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UAC设备改变采样率

大彬 2023-01-11 14:15:08 编辑


请教一下大家，我现在用USB声卡采集声音。图片中是输入接口的描述符，里面的端口没有采样率选项。我试着改变时钟的频率，发现在有的bAlternateSetting中能用，有的却不能用，不知道是哪的问题。如何正确的设置采样率？

USB中文网 2023-01-13 09:36:03 编辑

UAC设备的采样率是由UAC音频流接口描述符的 Audio Streaming Format Type Descripto来指定所支持的采样率的。其具体可详见https://www.usbzh.com/article/detail-184.html
而采样率的设置是由选择接口之后，是通过UAC的特点类请求（端点）来设置的，数据为3字节的采样率，详见：https://www.usbzh.com/article/detail-182.html

大彬 2023-01-13 10:42:53 编辑

谢谢你的回答！
我的这个声卡好像在端点里不能设置采样率，描述符里没有设置采样率的选项。应该可以在时钟单元里设置采样率，就是21 开头的命令。
声卡的厂家不是很专业，他只做硬件，和USB的描述符对不上，有的描述符是6通道，采集回来却是8通道的数据。
硬件上ADC的最大24bits的采样，USB描述符上却有32bits的选项。
外围的ADC芯片最大只有96k的采样率，更改192k的采样率后，有的bAlternateSetting采集到的数据听不了。有的bAlternateSetting采集到的数据用44100采样率去导入，音频听起来正常。
不过在windows下用Audicity设置192k采样率32bits采样，得到的音频数据听起来是正常的。Audicity对数据进行处理了吗？
刚开始接触，好多问题，请多指教。

USB中文网 2023-01-17 09:24:38 编辑

无论是否有几种采样率，打开时都会有个设置采样率的命令的。
AudioCity一般采到的是PCM数据。
你可以把你的设备信息通过USBTreeViewer这个工具导出，贴出来分析一下。

大彬 2023-01-18 11:03:48 编辑

下面是在linux下用lsusb命令导出的设备信息
809行 -1305行，是我要用到的接口描述符（录音），bAlternateSetting范围 0-9，里面没有采样率配置的选项。
我认为需要配置连接的时钟，才能改变采样率

  1. Bus 003 Device 007: ID 2fc6:6013 LIS Tech LIS_MIIS_8X8_192K
  2. Device Descriptor:
  3.   bLength                18
  4.   bDescriptorType         1
  5.   bcdUSB               2.00
  6.   bDeviceClass          239 Miscellaneous Device
  7.   bDeviceSubClass         2 
  8.   bDeviceProtocol         1 Interface Association
  9.   bMaxPacketSize0        64
  10.   idVendor           0x2fc6 
  11.   idProduct          0x6013 
  12.   bcdDevice            2.01
  13.   iManufacturer           1 LIS Tech
  14.   iProduct                2 LIS_MIIS_8X8_192K
  15.   iSerial                 3 LIS CTUAD
  16.   bNumConfigurations      1
  17.   Configuration Descriptor:
  18.     bLength                 9
  19.     bDescriptorType         2
  20.     wTotalLength       0x0503
  21.     bNumInterfaces          4
  22.     bConfigurationValue     1
  23.     iConfiguration          0 
  24.     bmAttributes         0x80
  25.       (Bus Powered)
  26.     MaxPower              100mA
  27.     Interface Association:
  28.       bLength                 8
  29.       bDescriptorType        11
  30.       bFirstInterface         0
  31.       bInterfaceCount         4
  32.       bFunctionClass          1 Audio
  33.       bFunctionSubClass       0 
  34.       bFunctionProtocol      32 
  35.       iFunction               0 
  36.     Interface Descriptor:
  37.       bLength                 9
  38.       bDescriptorType         4
  39.       bInterfaceNumber        0
  40.       bAlternateSetting       0
  41.       bNumEndpoints           0
  42.       bInterfaceClass         1 Audio
  43.       bInterfaceSubClass      1 Control Device        //00undef  01control  02stream 03midistream 
  44.       bInterfaceProtocol     32 
  45.       iInterface              2 LIS_MIIS_8X8_192K
  46.       AudioControl Interface Descriptor:
  47.         bLength                 9
  48.         bDescriptorType        36
  49.         bDescriptorSubtype      1 (HEADER)        // Class-Specific AC Interface Header Descriptor
  50.         bcdADC               2.00
  51.         bCategory               4
  52.         wTotalLength       0x00b4                        //类特定描述符总长度
  53.         bmControls           0x00
  54.       AudioControl Interface Descriptor:
  55.         bLength                 8
  56.         bDescriptorType        36
  57.         bDescriptorSubtype     10 (CLOCK_SOURCE)
  58.         bClockID                5
  59.         bmAttributes            3 Internal programmable clock 
  60.         bmControls           0x07
  61.           Clock Frequency Control (read/write)
  62.           Clock Validity Control (read-only)
  63.         bAssocTerminal          0
  64.         iClockSource            0 
  65.       AudioControl Interface Descriptor:
  66.         bLength                17
  67.         bDescriptorType        36
  68.         bDescriptorSubtype      2 (INPUT_TERMINAL)
  69.         bTerminalID             1
  70.         wTerminalType      0x0101 USB Streaming
  71.         bAssocTerminal          0
  72.         bCSourceID              5
  73.         bNrChannels             8
  74.         bmChannelConfig    0x000000ff
  75.           Front Left (FL)
  76.           Front Right (FR)
  77.           Front Center (FC)
  78.           Low Frequency Effects (LFE)
  79.           Back Left (BL)
  80.           Back Right (BR)
  81.           Front Left of Center (FLC)
  82.           Front Right of Center (FRC)
  83.         iChannelNames           0 
  84.         bmControls         0x0000
  85.         iTerminal               0 
  86.       AudioControl Interface Descriptor:
  87.         bLength                42
  88.         bDescriptorType        36
  89.         bDescriptorSubtype      6 (FEATURE_UNIT)
  90.         bUnitID                 3
  91.         bSourceID               1
  92.         bmaControls(0)     0x0000000f
  93.           Mute Control (read/write)
  94.           Volume Control (read/write)
  95.         bmaControls(1)     0x0000000c
  96.           Volume Control (read/write)
  97.         bmaControls(2)     0x0000000c
  98.           Volume Control (read/write)
  99.         bmaControls(3)     0x0000000c
  100.           Volume Control (read/write)
  101.         bmaControls(4)     0x0000000c
  102.           Volume Control (read/write)
  103.         bmaControls(5)     0x0000000c
  104.           Volume Control (read/write)
  105.         bmaControls(6)     0x0000000c
  106.           Volume Control (read/write)
  107.         bmaControls(7)     0x0000000c
  108.           Volume Control (read/write)
  109.         bmaControls(8)     0x0000000c
  110.           Volume Control (read/write)
  111.         iFeature                0 
  112.       AudioControl Interface Descriptor:
  113.         bLength                12
  114.         bDescriptorType        36
  115.         bDescriptorSubtype      3 (OUTPUT_TERMINAL)
  116.         bTerminalID             4
  117.         wTerminalType      0x0301 Speaker
  118.         bAssocTerminal          0
  119.         bSourceID               3
  120.         bCSourceID              5
  121.         bmControls         0x0000
  122.         iTerminal               0 
  123.       AudioControl Interface Descriptor:
  124.         bLength                 8
  125.         bDescriptorType        36
  126.         bDescriptorSubtype     10 (CLOCK_SOURCE)
  127.         bClockID               15
  128.         bmAttributes            3 Internal programmable clock 
  129.         bmControls           0x07
  130.           Clock Frequency Control (read/write)
  131.           Clock Validity Control (read-only)
  132.         bAssocTerminal          0
  133.         iClockSource            0 
  134.       AudioControl Interface Descriptor:
  135.         bLength                17
  136.         bDescriptorType        36
  137.         bDescriptorSubtype      2 (INPUT_TERMINAL)
  138.         bTerminalID            10
  139.         wTerminalType      0x0603 Line Connector
  140.         bAssocTerminal          0
  141.         bCSourceID             15
  142.         bNrChannels             8
  143.         bmChannelConfig    0x000000ff
  144.           Front Left (FL)
  145.           Front Right (FR)
  146.           Front Center (FC)
  147.           Low Frequency Effects (LFE)
  148.           Back Left (BL)
  149.           Back Right (BR)
  150.           Front Left of Center (FLC)
  151.           Front Right of Center (FRC)
  152.         iChannelNames           0 
  153.         bmControls         0x0000
  154.         iTerminal               0 
  155.       AudioControl Interface Descriptor:
  156.         bLength                12
  157.         bDescriptorType        36
  158.         bDescriptorSubtype      3 (OUTPUT_TERMINAL)
  159.         bTerminalID            13
  160.         wTerminalType      0x0101 USB Streaming
  161.         bAssocTerminal          0
  162.         bSourceID              10
  163.         bCSourceID             15
  164.         bmControls         0x0000
  165.         iTerminal               0 
  166.       AudioControl Interface Descriptor:
  167.         bLength                 8
  168.         bDescriptorType        36
  169.         bDescriptorSubtype     10 (CLOCK_SOURCE)
  170.         bClockID               21
  171.         bmAttributes            2 Internal variable clock 
  172.         bmControls           0x07
  173.           Clock Frequency Control (read/write)
  174.           Clock Validity Control (read-only)
  175.         bAssocTerminal          0
  176.         iClockSource            0 
  177.       AudioControl Interface Descriptor:
  178.         bLength                17
  179.         bDescriptorType        36
  180.         bDescriptorSubtype      2 (INPUT_TERMINAL)
  181.         bTerminalID            17
  182.         wTerminalType      0x0101 USB Streaming
  183.         bAssocTerminal          0
  184.         bCSourceID             21
  185.         bNrChannels             2
  186.         bmChannelConfig    0x00000003
  187.           Front Left (FL)
  188.           Front Right (FR)
  189.         iChannelNames           0 
  190.         bmControls         0x0000
  191.         iTerminal               0 
  192.       AudioControl Interface Descriptor:
  193.         bLength                18
  194.         bDescriptorType        36
  195.         bDescriptorSubtype      6 (FEATURE_UNIT)
  196.         bUnitID                19
  197.         bSourceID              17
  198.         bmaControls(0)     0x0000000f
  199.           Mute Control (read/write)
  200.           Volume Control (read/write)
  201.         bmaControls(1)     0x0000000c
  202.           Volume Control (read/write)
  203.         bmaControls(2)     0x0000000c
  204.           Volume Control (read/write)
  205.         iFeature                0 
  206.       AudioControl Interface Descriptor:
  207.         bLength                12
  208.         bDescriptorType        36
  209.         bDescriptorSubtype      3 (OUTPUT_TERMINAL)
  210.         bTerminalID            20
  211.         wTerminalType      0x0302 Headphones
  212.         bAssocTerminal          0
  213.         bSourceID              19
  214.         bCSourceID             21
  215.         bmControls         0x0000
  216.         iTerminal               0 
  217.     Interface Descriptor:
  218.       bLength                 9
  219.       bDescriptorType         4
  220.       bInterfaceNumber        1
  221.       bAlternateSetting       0    //0
  222.       bNumEndpoints           0
  223.       bInterfaceClass         1 Audio
  224.       bInterfaceSubClass      2 Streaming
  225.       bInterfaceProtocol     32 
  226.       iInterface              4 LIS_MIIS_8X8_192K
  227.     Interface Descriptor:
  228.       bLength                 9
  229.       bDescriptorType         4                            //4 标准音频流接口描述符 P75
  230.       bInterfaceNumber        1
  231.       bAlternateSetting       1        //1
  232.       bNumEndpoints           2
  233.       bInterfaceClass         1 Audio
  234.       bInterfaceSubClass      2 Streaming
  235.       bInterfaceProtocol     32 
  236.       iInterface              0 
  237.       AudioStreaming Interface Descriptor:                // 36  类特定 AS接口描述符 P76
  238.         bLength                16
  239.         bDescriptorType        36
  240.         bDescriptorSubtype      1 (AS_GENERAL)
  241.         bTerminalLink           1                                //连接 IT 1
  242.         bmControls           0x05
  243.           Active Alternate Setting Control (read-only)
  244.           Valid Alternate Setting Control (read-only)
  245.         bFormatType             1
  246.         bmFormats          0x00000001
  247.           PCM
  248.         bNrChannels             2                        //两个物理通道
  249.         bmChannelConfig    0x00000003
  250.           Front Left (FL)
  251.           Front Right (FR)
  252.         iChannelNames           0 
  253.       AudioStreaming Interface Descriptor:                // 
  254.         bLength                 6
  255.         bDescriptorType        36
  256.         bDescriptorSubtype      2 (FORMAT_TYPE)
  257.         bFormatType             1 (FORMAT_TYPE_I)
  258.         bSubslotSize            2
  259.         bBitResolution         16
  260.       Endpoint Descriptor:                        //5 标准音频流同步音频数据端点描述符 P85
  261.         bLength                 7
  262.         bDescriptorType         5
  263.         bEndpointAddress     0x01  EP 1 OUT
  264.         bmAttributes            5
  265.           Transfer Type            Isochronous
  266.           Synch Type               Asynchronous
  267.           Usage Type               Data
  268.         wMaxPacketSize     0x0308  1x 776 bytes
  269.         bInterval               1
  270.         AudioStreaming Endpoint Descriptor:                    //37 类特定音频流同步音频数据端点描述符 p87
  271.           bLength                 8
  272.           bDescriptorType        37
  273.           bDescriptorSubtype      1 (EP_GENERAL)
  274.           bmAttributes         0x00
  275.           bmControls           0x00
  276.           bLockDelayUnits         0 Undefined
  277.           wLockDelay         0x0000
  278.       Endpoint Descriptor:
  279.         bLength                 7
  280.         bDescriptorType         5
  281.         bEndpointAddress     0x81  EP 1 IN
  282.         bmAttributes           17
  283.           Transfer Type            Isochronous
  284.           Synch Type               None
  285.           Usage Type               Feedback
  286.         wMaxPacketSize     0x0004  1x 4 bytes
  287.         bInterval               4
  288.     Interface Descriptor:
  289.       bLength                 9
  290.       bDescriptorType         4
  291.       bInterfaceNumber        1
  292.       bAlternateSetting       2                //2
  293.       bNumEndpoints           2
  294.       bInterfaceClass         1 Audio
  295.       bInterfaceSubClass      2 Streaming
  296.       bInterfaceProtocol     32 
  297.       iInterface              0 
  298.       AudioStreaming Interface Descriptor:
  299.         bLength                16
  300.         bDescriptorType        36
  301.         bDescriptorSubtype      1 (AS_GENERAL)
  302.         bTerminalLink           1
  303.         bmControls           0x05
  304.           Active Alternate Setting Control (read-only)
  305.           Valid Alternate Setting Control (read-only)
  306.         bFormatType             1
  307.         bmFormats          0x00000001
  308.           PCM
  309.         bNrChannels             2
  310.         bmChannelConfig    0x00000003
  311.           Front Left (FL)
  312.           Front Right (FR)
  313.         iChannelNames           0 
  314.       AudioStreaming Interface Descriptor:
  315.         bLength                 6
  316.         bDescriptorType        36
  317.         bDescriptorSubtype      2 (FORMAT_TYPE)
  318.         bFormatType             1 (FORMAT_TYPE_I)
  319.         bSubslotSize            3
  320.         bBitResolution         24
  321.       Endpoint Descriptor:
  322.         bLength                 7
  323.         bDescriptorType         5
  324.         bEndpointAddress     0x01  EP 1 OUT
  325.         bmAttributes            5
  326.           Transfer Type            Isochronous
  327.           Synch Type               Asynchronous
  328.           Usage Type               Data
  329.         wMaxPacketSize     0x0308  1x 776 bytes
  330.         bInterval               1
  331.         AudioStreaming Endpoint Descriptor:
  332.           bLength                 8
  333.           bDescriptorType        37
  334.           bDescriptorSubtype      1 (EP_GENERAL)
  335.           bmAttributes         0x00
  336.           bmControls           0x00
  337.           bLockDelayUnits         0 Undefined
  338.           wLockDelay         0x0000
  339.       Endpoint Descriptor:
  340.         bLength                 7
  341.         bDescriptorType         5
  342.         bEndpointAddress     0x81  EP 1 IN
  343.         bmAttributes           17
  344.           Transfer Type            Isochronous
  345.           Synch Type               None
  346.           Usage Type               Feedback
  347.         wMaxPacketSize     0x0004  1x 4 bytes
  348.         bInterval               4
  349.     Interface Descriptor:
  350.       bLength                 9
  351.       bDescriptorType         4
  352.       bInterfaceNumber        1
  353.       bAlternateSetting       3
  354.       bNumEndpoints           2
  355.       bInterfaceClass         1 Audio
  356.       bInterfaceSubClass      2 Streaming
  357.       bInterfaceProtocol     32 
  358.       iInterface              0 
  359.       AudioStreaming Interface Descriptor:
  360.         bLength                16
  361.         bDescriptorType        36
  362.         bDescriptorSubtype      1 (AS_GENERAL)
  363.         bTerminalLink           1
  364.         bmControls           0x05
  365.           Active Alternate Setting Control (read-only)
  366.           Valid Alternate Setting Control (read-only)
  367.         bFormatType             1
  368.         bmFormats          0x00000001
  369.           PCM
  370.         bNrChannels             2
  371.         bmChannelConfig    0x00000003
  372.           Front Left (FL)
  373.           Front Right (FR)
  374.         iChannelNames           0 
  375.       AudioStreaming Interface Descriptor:
  376.         bLength                 6
  377.         bDescriptorType        36
  378.         bDescriptorSubtype      2 (FORMAT_TYPE)
  379.         bFormatType             1 (FORMAT_TYPE_I)
  380.         bSubslotSize            4
  381.         bBitResolution         32
  382.       Endpoint Descriptor:
  383.         bLength                 7
  384.         bDescriptorType         5
  385.         bEndpointAddress     0x01  EP 1 OUT
  386.         bmAttributes            5
  387.           Transfer Type            Isochronous
  388.           Synch Type               Asynchronous
  389.           Usage Type               Data
  390.         wMaxPacketSize     0x0308  1x 776 bytes
  391.         bInterval               1
  392.         AudioStreaming Endpoint Descriptor:
  393.           bLength                 8
  394.           bDescriptorType        37
  395.           bDescriptorSubtype      1 (EP_GENERAL)
  396.           bmAttributes         0x00
  397.           bmControls           0x00
  398.           bLockDelayUnits         0 Undefined
  399.           wLockDelay         0x0000
  400.       Endpoint Descriptor:
  401.         bLength                 7
  402.         bDescriptorType         5
  403.         bEndpointAddress     0x81  EP 1 IN
  404.         bmAttributes           17
  405.           Transfer Type            Isochronous
  406.           Synch Type               None
  407.           Usage Type               Feedback
  408.         wMaxPacketSize     0x0004  1x 4 bytes
  409.         bInterval               4
  410.     Interface Descriptor:
  411.       bLength                 9
  412.       bDescriptorType         4
  413.       bInterfaceNumber        1
  414.       bAlternateSetting       4
  415.       bNumEndpoints           2
  416.       bInterfaceClass         1 Audio
  417.       bInterfaceSubClass      2 Streaming
  418.       bInterfaceProtocol     32 
  419.       iInterface              0 
  420.       AudioStreaming Interface Descriptor:
  421.         bLength                16
  422.         bDescriptorType        36
  423.         bDescriptorSubtype      1 (AS_GENERAL)
  424.         bTerminalLink           1
  425.         bmControls           0x05
  426.           Active Alternate Setting Control (read-only)
  427.           Valid Alternate Setting Control (read-only)
  428.         bFormatType             1
  429.         bmFormats          0x00000001
  430.           PCM
  431.         bNrChannels             6
  432.         bmChannelConfig    0x0000003f
  433.           Front Left (FL)
  434.           Front Right (FR)
  435.           Front Center (FC)
  436.           Low Frequency Effects (LFE)
  437.           Back Left (BL)
  438.           Back Right (BR)
  439.         iChannelNames           0 
  440.       AudioStreaming Interface Descriptor:
  441.         bLength                 6
  442.         bDescriptorType        36
  443.         bDescriptorSubtype      2 (FORMAT_TYPE)
  444.         bFormatType             1 (FORMAT_TYPE_I)
  445.         bSubslotSize            2
  446.         bBitResolution         16
  447.       Endpoint Descriptor:
  448.         bLength                 7
  449.         bDescriptorType         5
  450.         bEndpointAddress     0x01  EP 1 OUT
  451.         bmAttributes            5
  452.           Transfer Type            Isochronous
  453.           Synch Type               Asynchronous
  454.           Usage Type               Data
  455.         wMaxPacketSize     0x0308  1x 776 bytes
  456.         bInterval               1
  457.         AudioStreaming Endpoint Descriptor:
  458.           bLength                 8
  459.           bDescriptorType        37
  460.           bDescriptorSubtype      1 (EP_GENERAL)
  461.           bmAttributes         0x00
  462.           bmControls           0x00
  463.           bLockDelayUnits         0 Undefined
  464.           wLockDelay         0x0000
  465.       Endpoint Descriptor:
  466.         bLength                 7
  467.         bDescriptorType         5
  468.         bEndpointAddress     0x81  EP 1 IN
  469.         bmAttributes           17
  470.           Transfer Type            Isochronous
  471.           Synch Type               None
  472.           Usage Type               Feedback
  473.         wMaxPacketSize     0x0004  1x 4 bytes
  474.         bInterval               4
  475.     Interface Descriptor:
  476.       bLength                 9
  477.       bDescriptorType         4
  478.       bInterfaceNumber        1
  479.       bAlternateSetting       5
  480.       bNumEndpoints           2
  481.       bInterfaceClass         1 Audio
  482.       bInterfaceSubClass      2 Streaming
  483.       bInterfaceProtocol     32 
  484.       iInterface              0 
  485.       AudioStreaming Interface Descriptor:
  486.         bLength                16
  487.         bDescriptorType        36
  488.         bDescriptorSubtype      1 (AS_GENERAL)
  489.         bTerminalLink           1
  490.         bmControls           0x05
  491.           Active Alternate Setting Control (read-only)
  492.           Valid Alternate Setting Control (read-only)
  493.         bFormatType             1
  494.         bmFormats          0x00000001
  495.           PCM
  496.         bNrChannels             6
  497.         bmChannelConfig    0x0000003f
  498.           Front Left (FL)
  499.           Front Right (FR)
  500.           Front Center (FC)
  501.           Low Frequency Effects (LFE)
  502.           Back Left (BL)
  503.           Back Right (BR)
  504.         iChannelNames           0 
  505.       AudioStreaming Interface Descriptor:
  506.         bLength                 6
  507.         bDescriptorType        36
  508.         bDescriptorSubtype      2 (FORMAT_TYPE)
  509.         bFormatType             1 (FORMAT_TYPE_I)
  510.         bSubslotSize            3
  511.         bBitResolution         24
  512.       Endpoint Descriptor:
  513.         bLength                 7
  514.         bDescriptorType         5
  515.         bEndpointAddress     0x01  EP 1 OUT
  516.         bmAttributes            5
  517.           Transfer Type            Isochronous
  518.           Synch Type               Asynchronous
  519.           Usage Type               Data
  520.         wMaxPacketSize     0x0308  1x 776 bytes
  521.         bInterval               1
  522.         AudioStreaming Endpoint Descriptor:
  523.           bLength                 8
  524.           bDescriptorType        37
  525.           bDescriptorSubtype      1 (EP_GENERAL)
  526.           bmAttributes         0x00
  527.           bmControls           0x00
  528.           bLockDelayUnits         0 Undefined
  529.           wLockDelay         0x0000
  530.       Endpoint Descriptor:
  531.         bLength                 7
  532.         bDescriptorType         5
  533.         bEndpointAddress     0x81  EP 1 IN
  534.         bmAttributes           17
  535.           Transfer Type            Isochronous
  536.           Synch Type               None
  537.           Usage Type               Feedback
  538.         wMaxPacketSize     0x0004  1x 4 bytes
  539.         bInterval               4
  540.     Interface Descriptor:
  541.       bLength                 9
  542.       bDescriptorType         4
  543.       bInterfaceNumber        1
  544.       bAlternateSetting       6
  545.       bNumEndpoints           2
  546.       bInterfaceClass         1 Audio
  547.       bInterfaceSubClass      2 Streaming
  548.       bInterfaceProtocol     32 
  549.       iInterface              0 
  550.       AudioStreaming Interface Descriptor:
  551.         bLength                16
  552.         bDescriptorType        36
  553.         bDescriptorSubtype      1 (AS_GENERAL)
  554.         bTerminalLink           1
  555.         bmControls           0x05
  556.           Active Alternate Setting Control (read-only)
  557.           Valid Alternate Setting Control (read-only)
  558.         bFormatType             1
  559.         bmFormats          0x00000001
  560.           PCM
  561.         bNrChannels             6
  562.         bmChannelConfig    0x0000003f
  563.           Front Left (FL)
  564.           Front Right (FR)
  565.           Front Center (FC)
  566.           Low Frequency Effects (LFE)
  567.           Back Left (BL)
  568.           Back Right (BR)
  569.         iChannelNames           0 
  570.       AudioStreaming Interface Descriptor:
  571.         bLength                 6
  572.         bDescriptorType        36
  573.         bDescriptorSubtype      2 (FORMAT_TYPE)
  574.         bFormatType             1 (FORMAT_TYPE_I)
  575.         bSubslotSize            4
  576.         bBitResolution         32
  577.       Endpoint Descriptor:
  578.         bLength                 7
  579.         bDescriptorType         5
  580.         bEndpointAddress     0x01  EP 1 OUT
  581.         bmAttributes            5
  582.           Transfer Type            Isochronous
  583.           Synch Type               Asynchronous
  584.           Usage Type               Data
  585.         wMaxPacketSize     0x0308  1x 776 bytes
  586.         bInterval               1
  587.         AudioStreaming Endpoint Descriptor:
  588.           bLength                 8
  589.           bDescriptorType        37
  590.           bDescriptorSubtype      1 (EP_GENERAL)
  591.           bmAttributes         0x00
  592.           bmControls           0x00
  593.           bLockDelayUnits         0 Undefined
  594.           wLockDelay         0x0000
  595.       Endpoint Descriptor:
  596.         bLength                 7
  597.         bDescriptorType         5
  598.         bEndpointAddress     0x81  EP 1 IN
  599.         bmAttributes           17
  600.           Transfer Type            Isochronous
  601.           Synch Type               None
  602.           Usage Type               Feedback
  603.         wMaxPacketSize     0x0004  1x 4 bytes
  604.         bInterval               4
  605.     Interface Descriptor:
  606.       bLength                 9
  607.       bDescriptorType         4
  608.       bInterfaceNumber        1
  609.       bAlternateSetting       7
  610.       bNumEndpoints           2
  611.       bInterfaceClass         1 Audio
  612.       bInterfaceSubClass      2 Streaming
  613.       bInterfaceProtocol     32 
  614.       iInterface              0 
  615.       AudioStreaming Interface Descriptor:
  616.         bLength                16
  617.         bDescriptorType        36
  618.         bDescriptorSubtype      1 (AS_GENERAL)
  619.         bTerminalLink           1
  620.         bmControls           0x05
  621.           Active Alternate Setting Control (read-only)
  622.           Valid Alternate Setting Control (read-only)
  623.         bFormatType             1
  624.         bmFormats          0x00000001
  625.           PCM
  626.         bNrChannels             8
  627.         bmChannelConfig    0x000000ff
  628.           Front Left (FL)
  629.           Front Right (FR)
  630.           Front Center (FC)
  631.           Low Frequency Effects (LFE)
  632.           Back Left (BL)
  633.           Back Right (BR)
  634.           Front Left of Center (FLC)
  635.           Front Right of Center (FRC)
  636.         iChannelNames           0 
  637.       AudioStreaming Interface Descriptor:
  638.         bLength                 6
  639.         bDescriptorType        36
  640.         bDescriptorSubtype      2 (FORMAT_TYPE)
  641.         bFormatType             1 (FORMAT_TYPE_I)
  642.         bSubslotSize            2
  643.         bBitResolution         16
  644.       Endpoint Descriptor:
  645.         bLength                 7
  646.         bDescriptorType         5
  647.         bEndpointAddress     0x01  EP 1 OUT
  648.         bmAttributes            5
  649.           Transfer Type            Isochronous
  650.           Synch Type               Asynchronous
  651.           Usage Type               Data
  652.         wMaxPacketSize     0x0308  1x 776 bytes
  653.         bInterval               1
  654.         AudioStreaming Endpoint Descriptor:
  655.           bLength                 8
  656.           bDescriptorType        37
  657.           bDescriptorSubtype      1 (EP_GENERAL)
  658.           bmAttributes         0x00
  659.           bmControls           0x00
  660.           bLockDelayUnits         0 Undefined
  661.           wLockDelay         0x0000
  662.       Endpoint Descriptor:
  663.         bLength                 7
  664.         bDescriptorType         5
  665.         bEndpointAddress     0x81  EP 1 IN
  666.         bmAttributes           17
  667.           Transfer Type            Isochronous
  668.           Synch Type               None
  669.           Usage Type               Feedback
  670.         wMaxPacketSize     0x0004  1x 4 bytes
  671.         bInterval               4
  672.     Interface Descriptor:
  673.       bLength                 9
  674.       bDescriptorType         4
  675.       bInterfaceNumber        1
  676.       bAlternateSetting       8
  677.       bNumEndpoints           2
  678.       bInterfaceClass         1 Audio
  679.       bInterfaceSubClass      2 Streaming
  680.       bInterfaceProtocol     32 
  681.       iInterface              0 
  682.       AudioStreaming Interface Descriptor:
  683.         bLength                16
  684.         bDescriptorType        36
  685.         bDescriptorSubtype      1 (AS_GENERAL)
  686.         bTerminalLink           1
  687.         bmControls           0x05
  688.           Active Alternate Setting Control (read-only)
  689.           Valid Alternate Setting Control (read-only)
  690.         bFormatType             1
  691.         bmFormats          0x00000001
  692.           PCM
  693.         bNrChannels             8
  694.         bmChannelConfig    0x000000ff
  695.           Front Left (FL)
  696.           Front Right (FR)
  697.           Front Center (FC)
  698.           Low Frequency Effects (LFE)
  699.           Back Left (BL)
  700.           Back Right (BR)
  701.           Front Left of Center (FLC)
  702.           Front Right of Center (FRC)
  703.         iChannelNames           0 
  704.       AudioStreaming Interface Descriptor:
  705.         bLength                 6
  706.         bDescriptorType        36
  707.         bDescriptorSubtype      2 (FORMAT_TYPE)
  708.         bFormatType             1 (FORMAT_TYPE_I)
  709.         bSubslotSize            3
  710.         bBitResolution         24
  711.       Endpoint Descriptor:
  712.         bLength                 7
  713.         bDescriptorType         5
  714.         bEndpointAddress     0x01  EP 1 OUT
  715.         bmAttributes            5
  716.           Transfer Type            Isochronous
  717.           Synch Type               Asynchronous
  718.           Usage Type               Data
  719.         wMaxPacketSize     0x0308  1x 776 bytes
  720.         bInterval               1
  721.         AudioStreaming Endpoint Descriptor:
  722.           bLength                 8
  723.           bDescriptorType        37
  724.           bDescriptorSubtype      1 (EP_GENERAL)
  725.           bmAttributes         0x00
  726.           bmControls           0x00
  727.           bLockDelayUnits         0 Undefined
  728.           wLockDelay         0x0000
  729.       Endpoint Descriptor:
  730.         bLength                 7
  731.         bDescriptorType         5
  732.         bEndpointAddress     0x81  EP 1 IN
  733.         bmAttributes           17
  734.           Transfer Type            Isochronous
  735.           Synch Type               None
  736.           Usage Type               Feedback
  737.         wMaxPacketSize     0x0004  1x 4 bytes
  738.         bInterval               4
  739.     Interface Descriptor:
  740.       bLength                 9
  741.       bDescriptorType         4
  742.       bInterfaceNumber        1
  743.       bAlternateSetting       9
  744.       bNumEndpoints           2
  745.       bInterfaceClass         1 Audio
  746.       bInterfaceSubClass      2 Streaming
  747.       bInterfaceProtocol     32 
  748.       iInterface              0 
  749.       AudioStreaming Interface Descriptor:
  750.         bLength                16
  751.         bDescriptorType        36
  752.         bDescriptorSubtype      1 (AS_GENERAL)
  753.         bTerminalLink           1
  754.         bmControls           0x05
  755.           Active Alternate Setting Control (read-only)
  756.           Valid Alternate Setting Control (read-only)
  757.         bFormatType             1
  758.         bmFormats          0x00000001
  759.           PCM
  760.         bNrChannels             8
  761.         bmChannelConfig    0x000000ff
  762.           Front Left (FL)
  763.           Front Right (FR)
  764.           Front Center (FC)
  765.           Low Frequency Effects (LFE)
  766.           Back Left (BL)
  767.           Back Right (BR)
  768.           Front Left of Center (FLC)
  769.           Front Right of Center (FRC)
  770.         iChannelNames           0 
  771.       AudioStreaming Interface Descriptor:
  772.         bLength                 6
  773.         bDescriptorType        36
  774.         bDescriptorSubtype      2 (FORMAT_TYPE)
  775.         bFormatType             1 (FORMAT_TYPE_I)
  776.         bSubslotSize            4
  777.         bBitResolution         32
  778.       Endpoint Descriptor:
  779.         bLength                 7
  780.         bDescriptorType         5
  781.         bEndpointAddress     0x01  EP 1 OUT
  782.         bmAttributes            5
  783.           Transfer Type            Isochronous
  784.           Synch Type               Asynchronous
  785.           Usage Type               Data
  786.         wMaxPacketSize     0x0308  1x 776 bytes
  787.         bInterval               1
  788.         AudioStreaming Endpoint Descriptor:
  789.           bLength                 8
  790.           bDescriptorType        37
  791.           bDescriptorSubtype      1 (EP_GENERAL)
  792.           bmAttributes         0x00
  793.           bmControls           0x00
  794.           bLockDelayUnits         0 Undefined
  795.           wLockDelay         0x0000
  796.       Endpoint Descriptor:
  797.         bLength                 7
  798.         bDescriptorType         5
  799.         bEndpointAddress     0x81  EP 1 IN
  800.         bmAttributes           17
  801.           Transfer Type            Isochronous
  802.           Synch Type               None
  803.           Usage Type               Feedback
  804.         wMaxPacketSize     0x0004  1x 4 bytes
  805.         bInterval               4
  806.     Interface Descriptor:
  807.       bLength                 9
  808.       bDescriptorType         4
  809.       bInterfaceNumber        2                            //数字是 2
  810.       bAlternateSetting       0
  811.       bNumEndpoints           0
  812.       bInterfaceClass         1 Audio
  813.       bInterfaceSubClass      2 Streaming
  814.       bInterfaceProtocol     32 
  815.       iInterface              5 LIS_MIIS_8X8_192K
  816.     Interface Descriptor:
  817.       bLength                 9
  818.       bDescriptorType         4
  819.       bInterfaceNumber        2
  820.       bAlternateSetting       1
  821.       bNumEndpoints           1
  822.       bInterfaceClass         1 Audio
  823.       bInterfaceSubClass      2 Streaming
  824.       bInterfaceProtocol     32 
  825.       iInterface              0 
  826.       AudioStreaming Interface Descriptor:
  827.         bLength                16
  828.         bDescriptorType        36
  829.         bDescriptorSubtype      1 (AS_GENERAL)
  830.         bTerminalLink          13                            //usb 输入端
  831.         bmControls           0x05
  832.           Active Alternate Setting Control (read-only)
  833.           Valid Alternate Setting Control (read-only)
  834.         bFormatType             1
  835.         bmFormats          0x00000001
  836.           PCM
  837.         bNrChannels             2
  838.         bmChannelConfig    0x00000003
  839.           Front Left (FL)
  840.           Front Right (FR)
  841.         iChannelNames           0 
  842.       AudioStreaming Interface Descriptor:
  843.         bLength                 6
  844.         bDescriptorType        36
  845.         bDescriptorSubtype      2 (FORMAT_TYPE)
  846.         bFormatType             1 (FORMAT_TYPE_I)
  847.         bSubslotSize            2
  848.         bBitResolution         16
  849.       Endpoint Descriptor:
  850.         bLength                 7
  851.         bDescriptorType         5
  852.         bEndpointAddress     0x82  EP 2 IN
  853.         bmAttributes            5
  854.           Transfer Type            Isochronous
  855.           Synch Type               Asynchronous
  856.           Usage Type               Data
  857.         wMaxPacketSize     0x0308  1x 776 bytes
  858.         bInterval               1
  859.         AudioStreaming Endpoint Descriptor:
  860.           bLength                 8
  861.           bDescriptorType        37
  862.           bDescriptorSubtype      1 (EP_GENERAL)
  863.           bmAttributes         0x00
  864.           bmControls           0x00
  865.           bLockDelayUnits         0 Undefined
  866.           wLockDelay         0x0000
  867.     Interface Descriptor:
  868.       bLength                 9
  869.       bDescriptorType         4
  870.       bInterfaceNumber        2
  871.       bAlternateSetting       2
  872.       bNumEndpoints           1
  873.       bInterfaceClass         1 Audio
  874.       bInterfaceSubClass      2 Streaming
  875.       bInterfaceProtocol     32 
  876.       iInterface              0 
  877.       AudioStreaming Interface Descriptor:
  878.         bLength                16
  879.         bDescriptorType        36
  880.         bDescriptorSubtype      1 (AS_GENERAL)
  881.         bTerminalLink          13
  882.         bmControls           0x05
  883.           Active Alternate Setting Control (read-only)
  884.           Valid Alternate Setting Control (read-only)
  885.         bFormatType             1
  886.         bmFormats          0x00000001
  887.           PCM
  888.         bNrChannels             2
  889.         bmChannelConfig    0x00000003
  890.           Front Left (FL)
  891.           Front Right (FR)
  892.         iChannelNames           0 
  893.       AudioStreaming Interface Descriptor:
  894.         bLength                 6
  895.         bDescriptorType        36
  896.         bDescriptorSubtype      2 (FORMAT_TYPE)
  897.         bFormatType             1 (FORMAT_TYPE_I)
  898.         bSubslotSize            3
  899.         bBitResolution         24
  900.       Endpoint Descriptor:
  901.         bLength                 7
  902.         bDescriptorType         5
  903.         bEndpointAddress     0x82  EP 2 IN
  904.         bmAttributes            5
  905.           Transfer Type            Isochronous
  906.           Synch Type               Asynchronous
  907.           Usage Type               Data
  908.         wMaxPacketSize     0x0308  1x 776 bytes
  909.         bInterval               1
  910.         AudioStreaming Endpoint Descriptor:
  911.           bLength                 8
  912.           bDescriptorType        37
  913.           bDescriptorSubtype      1 (EP_GENERAL)
  914.           bmAttributes         0x00
  915.           bmControls           0x00
  916.           bLockDelayUnits         0 Undefined
  917.           wLockDelay         0x0000
  918.     Interface Descriptor:
  919.       bLength                 9
  920.       bDescriptorType         4
  921.       bInterfaceNumber        2
  922.       bAlternateSetting       3
  923.       bNumEndpoints           1
  924.       bInterfaceClass         1 Audio
  925.       bInterfaceSubClass      2 Streaming
  926.       bInterfaceProtocol     32 
  927.       iInterface              0 
  928.       AudioStreaming Interface Descriptor:
  929.         bLength                16
  930.         bDescriptorType        36
  931.         bDescriptorSubtype      1 (AS_GENERAL)
  932.         bTerminalLink          13
  933.         bmControls           0x05
  934.           Active Alternate Setting Control (read-only)
  935.           Valid Alternate Setting Control (read-only)
  936.         bFormatType             1
  937.         bmFormats          0x00000001
  938.           PCM
  939.         bNrChannels             2
  940.         bmChannelConfig    0x00000003
  941.           Front Left (FL)
  942.           Front Right (FR)
  943.         iChannelNames           0 
  944.       AudioStreaming Interface Descriptor:
  945.         bLength                 6
  946.         bDescriptorType        36
  947.         bDescriptorSubtype      2 (FORMAT_TYPE)
  948.         bFormatType             1 (FORMAT_TYPE_I)
  949.         bSubslotSize            4
  950.         bBitResolution         32
  951.       Endpoint Descriptor:
  952.         bLength                 7
  953.         bDescriptorType         5
  954.         bEndpointAddress     0x82  EP 2 IN
  955.         bmAttributes            5
  956.           Transfer Type            Isochronous
  957.           Synch Type               Asynchronous
  958.           Usage Type               Data
  959.         wMaxPacketSize     0x0308  1x 776 bytes
  960.         bInterval               1
  961.         AudioStreaming Endpoint Descriptor:
  962.           bLength                 8
  963.           bDescriptorType        37
  964.           bDescriptorSubtype      1 (EP_GENERAL)
  965.           bmAttributes         0x00
  966.           bmControls           0x00
  967.           bLockDelayUnits         0 Undefined
  968.           wLockDelay         0x0000
  969.     Interface Descriptor:
  970.       bLength                 9
  971.       bDescriptorType         4
  972.       bInterfaceNumber        2
  973.       bAlternateSetting       4
  974.       bNumEndpoints           1
  975.       bInterfaceClass         1 Audio
  976.       bInterfaceSubClass      2 Streaming
  977.       bInterfaceProtocol     32 
  978.       iInterface              0 
  979.       AudioStreaming Interface Descriptor:
  980.         bLength                16
  981.         bDescriptorType        36
  982.         bDescriptorSubtype      1 (AS_GENERAL)
  983.         bTerminalLink          13
  984.         bmControls           0x05
  985.           Active Alternate Setting Control (read-only)
  986.           Valid Alternate Setting Control (read-only)
  987.         bFormatType             1
  988.         bmFormats          0x00000001
  989.           PCM
  990.         bNrChannels             6
  991.         bmChannelConfig    0x0000003f
  992.           Front Left (FL)
  993.           Front Right (FR)
  994.           Front Center (FC)
  995.           Low Frequency Effects (LFE)
  996.           Back Left (BL)
  997.           Back Right (BR)
  998.         iChannelNames           0 
  999.       AudioStreaming Interface Descriptor:
  1000.         bLength                 6
  1001.         bDescriptorType        36
  1002.         bDescriptorSubtype      2 (FORMAT_TYPE)
  1003.         bFormatType             1 (FORMAT_TYPE_I)
  1004.         bSubslotSize            2
  1005.         bBitResolution         16
  1006.       Endpoint Descriptor:
  1007.         bLength                 7
  1008.         bDescriptorType         5
  1009.         bEndpointAddress     0x82  EP 2 IN
  1010.         bmAttributes            5
  1011.           Transfer Type            Isochronous
  1012.           Synch Type               Asynchronous
  1013.           Usage Type               Data
  1014.         wMaxPacketSize     0x0308  1x 776 bytes
  1015.         bInterval               1
  1016.         AudioStreaming Endpoint Descriptor:
  1017.           bLength                 8
  1018.           bDescriptorType        37
  1019.           bDescriptorSubtype      1 (EP_GENERAL)
  1020.           bmAttributes         0x00
  1021.           bmControls           0x00
  1022.           bLockDelayUnits         0 Undefined
  1023.           wLockDelay         0x0000
  1024.     Interface Descriptor:
  1025.       bLength                 9
  1026.       bDescriptorType         4
  1027.       bInterfaceNumber        2
  1028.       bAlternateSetting       5
  1029.       bNumEndpoints           1
  1030.       bInterfaceClass         1 Audio
  1031.       bInterfaceSubClass      2 Streaming
  1032.       bInterfaceProtocol     32 
  1033.       iInterface              0 
  1034.       AudioStreaming Interface Descriptor:
  1035.         bLength                16
  1036.         bDescriptorType        36
  1037.         bDescriptorSubtype      1 (AS_GENERAL)
  1038.         bTerminalLink          13
  1039.         bmControls           0x05
  1040.           Active Alternate Setting Control (read-only)
  1041.           Valid Alternate Setting Control (read-only)
  1042.         bFormatType             1
  1043.         bmFormats          0x00000001
  1044.           PCM
  1045.         bNrChannels             6
  1046.         bmChannelConfig    0x0000003f
  1047.           Front Left (FL)
  1048.           Front Right (FR)
  1049.           Front Center (FC)
  1050.           Low Frequency Effects (LFE)
  1051.           Back Left (BL)
  1052.           Back Right (BR)
  1053.         iChannelNames           0 
  1054.       AudioStreaming Interface Descriptor:
  1055.         bLength                 6
  1056.         bDescriptorType        36
  1057.         bDescriptorSubtype      2 (FORMAT_TYPE)
  1058.         bFormatType             1 (FORMAT_TYPE_I)
  1059.         bSubslotSize            3
  1060.         bBitResolution         24
  1061.       Endpoint Descriptor:
  1062.         bLength                 7
  1063.         bDescriptorType         5
  1064.         bEndpointAddress     0x82  EP 2 IN
  1065.         bmAttributes            5
  1066.           Transfer Type            Isochronous
  1067.           Synch Type               Asynchronous
  1068.           Usage Type               Data
  1069.         wMaxPacketSize     0x0308  1x 776 bytes
  1070.         bInterval               1
  1071.         AudioStreaming Endpoint Descriptor:
  1072.           bLength                 8
  1073.           bDescriptorType        37
  1074.           bDescriptorSubtype      1 (EP_GENERAL)
  1075.           bmAttributes         0x00
  1076.           bmControls           0x00
  1077.           bLockDelayUnits         0 Undefined
  1078.           wLockDelay         0x0000
  1079.     Interface Descriptor:
  1080.       bLength                 9
  1081.       bDescriptorType         4
  1082.       bInterfaceNumber        2
  1083.       bAlternateSetting       6
  1084.       bNumEndpoints           1
  1085.       bInterfaceClass         1 Audio
  1086.       bInterfaceSubClass      2 Streaming
  1087.       bInterfaceProtocol     32 
  1088.       iInterface              0 
  1089.       AudioStreaming Interface Descriptor:
  1090.         bLength                16
  1091.         bDescriptorType        36
  1092.         bDescriptorSubtype      1 (AS_GENERAL)
  1093.         bTerminalLink          13
  1094.         bmControls           0x05
  1095.           Active Alternate Setting Control (read-only)
  1096.           Valid Alternate Setting Control (read-only)
  1097.         bFormatType             1
  1098.         bmFormats          0x00000001
  1099.           PCM
  1100.         bNrChannels             6
  1101.         bmChannelConfig    0x0000003f
  1102.           Front Left (FL)
  1103.           Front Right (FR)
  1104.           Front Center (FC)
  1105.           Low Frequency Effects (LFE)
  1106.           Back Left (BL)
  1107.           Back Right (BR)
  1108.         iChannelNames           0 
  1109.       AudioStreaming Interface Descriptor:
  1110.         bLength                 6
  1111.         bDescriptorType        36
  1112.         bDescriptorSubtype      2 (FORMAT_TYPE)
  1113.         bFormatType             1 (FORMAT_TYPE_I)
  1114.         bSubslotSize            4
  1115.         bBitResolution         32
  1116.       Endpoint Descriptor:
  1117.         bLength                 7
  1118.         bDescriptorType         5
  1119.         bEndpointAddress     0x82  EP 2 IN
  1120.         bmAttributes            5
  1121.           Transfer Type            Isochronous
  1122.           Synch Type               Asynchronous
  1123.           Usage Type               Data
  1124.         wMaxPacketSize     0x0308  1x 776 bytes
  1125.         bInterval               1
  1126.         AudioStreaming Endpoint Descriptor:
  1127.           bLength                 8
  1128.           bDescriptorType        37
  1129.           bDescriptorSubtype      1 (EP_GENERAL)
  1130.           bmAttributes         0x00
  1131.           bmControls           0x00
  1132.           bLockDelayUnits         0 Undefined
  1133.           wLockDelay         0x0000
  1134.     Interface Descriptor:
  1135.       bLength                 9
  1136.       bDescriptorType         4
  1137.       bInterfaceNumber        2
  1138.       bAlternateSetting       7
  1139.       bNumEndpoints           1
  1140.       bInterfaceClass         1 Audio
  1141.       bInterfaceSubClass      2 Streaming
  1142.       bInterfaceProtocol     32 
  1143.       iInterface              0 
  1144.       AudioStreaming Interface Descriptor:
  1145.         bLength                16
  1146.         bDescriptorType        36
  1147.         bDescriptorSubtype      1 (AS_GENERAL)
  1148.         bTerminalLink          13
  1149.         bmControls           0x05
  1150.           Active Alternate Setting Control (read-only)
  1151.           Valid Alternate Setting Control (read-only)
  1152.         bFormatType             1
  1153.         bmFormats          0x00000001
  1154.           PCM
  1155.         bNrChannels             8
  1156.         bmChannelConfig    0x000000ff
  1157.           Front Left (FL)
  1158.           Front Right (FR)
  1159.           Front Center (FC)
  1160.           Low Frequency Effects (LFE)
  1161.           Back Left (BL)
  1162.           Back Right (BR)
  1163.           Front Left of Center (FLC)
  1164.           Front Right of Center (FRC)
  1165.         iChannelNames           0 
  1166.       AudioStreaming Interface Descriptor:
  1167.         bLength                 6
  1168.         bDescriptorType        36
  1169.         bDescriptorSubtype      2 (FORMAT_TYPE)
  1170.         bFormatType             1 (FORMAT_TYPE_I)
  1171.         bSubslotSize            2
  1172.         bBitResolution         16
  1173.       Endpoint Descriptor:
  1174.         bLength                 7
  1175.         bDescriptorType         5
  1176.         bEndpointAddress     0x82  EP 2 IN
  1177.         bmAttributes            5
  1178.           Transfer Type            Isochronous
  1179.           Synch Type               Asynchronous
  1180.           Usage Type               Data
  1181.         wMaxPacketSize     0x0308  1x 776 bytes
  1182.         bInterval               1
  1183.         AudioStreaming Endpoint Descriptor:
  1184.           bLength                 8
  1185.           bDescriptorType        37
  1186.           bDescriptorSubtype      1 (EP_GENERAL)
  1187.           bmAttributes         0x00
  1188.           bmControls           0x00
  1189.           bLockDelayUnits         0 Undefined
  1190.           wLockDelay         0x0000
  1191.     Interface Descriptor:
  1192.       bLength                 9
  1193.       bDescriptorType         4
  1194.       bInterfaceNumber        2
  1195.       bAlternateSetting       8                                    //实际16bits
  1196.       bNumEndpoints           1
  1197.       bInterfaceClass         1 Audio
  1198.       bInterfaceSubClass      2 Streaming
  1199.       bInterfaceProtocol     32 
  1200.       iInterface              0 
  1201.       AudioStreaming Interface Descriptor:
  1202.         bLength                16
  1203.         bDescriptorType        36
  1204.         bDescriptorSubtype      1 (AS_GENERAL)
  1205.         bTerminalLink            13
  1206.         bmControls           0x05
  1207.           Active Alternate Setting Control (read-only)
  1208.           Valid Alternate Setting Control (read-only)
  1209.         bFormatType             1
  1210.         bmFormats          0x00000001
  1211.           PCM
  1212.         bNrChannels             8
  1213.         bmChannelConfig    0x000000ff
  1214.           Front Left (FL)
  1215.           Front Right (FR)
  1216.           Front Center (FC)
  1217.           Low Frequency Effects (LFE)
  1218.           Back Left (BL)
  1219.           Back Right (BR)
  1220.           Front Left of Center (FLC)
  1221.           Front Right of Center (FRC)
  1222.         iChannelNames           0 
  1223.       AudioStreaming Interface Descriptor:
  1224.         bLength                 6
  1225.         bDescriptorType        36
  1226.         bDescriptorSubtype      2 (FORMAT_TYPE)
  1227.         bFormatType             1 (FORMAT_TYPE_I)
  1228.         bSubslotSize            3
  1229.         bBitResolution         24
  1230.       Endpoint Descriptor:
  1231.         bLength                 7
  1232.         bDescriptorType         5
  1233.         bEndpointAddress     0x82  EP 2 IN
  1234.         bmAttributes            5
  1235.           Transfer Type            Isochronous
  1236.           Synch Type               Asynchronous
  1237.           Usage Type               Data
  1238.         wMaxPacketSize     0x0308  1x 776 bytes
  1239.         bInterval               1
  1240.         AudioStreaming Endpoint Descriptor:
  1241.           bLength                 8
  1242.           bDescriptorType        37
  1243.           bDescriptorSubtype      1 (EP_GENERAL)
  1244.           bmAttributes         0x00
  1245.           bmControls           0x00
  1246.           bLockDelayUnits         0 Undefined
  1247.           wLockDelay         0x0000
  1248.     Interface Descriptor:
  1249.       bLength                 9
  1250.       bDescriptorType         4
  1251.       bInterfaceNumber        2
  1252.       bAlternateSetting       9                                //实际8个通道 44.1k采样可用
  1253.       bNumEndpoints           1
  1254.       bInterfaceClass         1 Audio
  1255.       bInterfaceSubClass      2 Streaming
  1256.       bInterfaceProtocol     32 
  1257.       iInterface              0 
  1258.       AudioStreaming Interface Descriptor:
  1259.         bLength                16
  1260.         bDescriptorType        36
  1261.         bDescriptorSubtype      1 (AS_GENERAL)
  1262.         bTerminalLink          13
  1263.         bmControls           0x05
  1264.           Active Alternate Setting Control (read-only)
  1265.           Valid Alternate Setting Control (read-only)
  1266.         bFormatType             1
  1267.         bmFormats          0x00000001
  1268.           PCM
  1269.         bNrChannels             6
  1270.         bmChannelConfig    0x0000003f
  1271.           Front Left (FL)
  1272.           Front Right (FR)
  1273.           Front Center (FC)
  1274.           Low Frequency Effects (LFE)
  1275.           Back Left (BL)
  1276.           Back Right (BR)
  1277.         iChannelNames           0 
  1278.       AudioStreaming Interface Descriptor:
  1279.         bLength                 6
  1280.         bDescriptorType        36
  1281.         bDescriptorSubtype      2 (FORMAT_TYPE)
  1282.         bFormatType             1 (FORMAT_TYPE_I)
  1283.         bSubslotSize            4
  1284.         bBitResolution         32
  1285.       Endpoint Descriptor:
  1286.         bLength                 7
  1287.         bDescriptorType         5
  1288.         bEndpointAddress     0x82  EP 2 IN
  1289.         bmAttributes            5
  1290.           Transfer Type            Isochronous
  1291.           Synch Type               Asynchronous
  1292.           Usage Type               Data
  1293.         wMaxPacketSize     0x0308  1x 776 bytes
  1294.         bInterval               1
  1295.         AudioStreaming Endpoint Descriptor:
  1296.           bLength                 8
  1297.           bDescriptorType        37
  1298.           bDescriptorSubtype      1 (EP_GENERAL)
  1299.           bmAttributes         0x00
  1300.           bmControls           0x00
  1301.           bLockDelayUnits         0 Undefined
  1302.           wLockDelay         0x0000
  1303.     Interface Descriptor:
  1304.       bLength                 9
  1305.       bDescriptorType         4
  1306.       bInterfaceNumber        3
  1307.       bAlternateSetting       0
  1308.       bNumEndpoints           0
  1309.       bInterfaceClass         1 Audio
  1310.       bInterfaceSubClass      2 Streaming
  1311.       bInterfaceProtocol     32 
  1312.       iInterface              6 LIS_MIIS_8X8_192K
  1313.     Interface Descriptor:
  1314.       bLength                 9
  1315.       bDescriptorType         4
  1316.       bInterfaceNumber        3
  1317.       bAlternateSetting       1
  1318.       bNumEndpoints           2
  1319.       bInterfaceClass         1 Audio
  1320.       bInterfaceSubClass      2 Streaming
  1321.       bInterfaceProtocol     32 
  1322.       iInterface              0 
  1323.       AudioStreaming Interface Descriptor:
  1324.         bLength                16
  1325.         bDescriptorType        36
  1326.         bDescriptorSubtype      1 (AS_GENERAL)
  1327.         bTerminalLink          17
  1328.         bmControls           0x05
  1329.           Active Alternate Setting Control (read-only)
  1330.           Valid Alternate Setting Control (read-only)
  1331.         bFormatType             1
  1332.         bmFormats          0x00000001
  1333.           PCM
  1334.         bNrChannels             2
  1335.         bmChannelConfig    0x00000003
  1336.           Front Left (FL)
  1337.           Front Right (FR)
  1338.         iChannelNames           0 
  1339.       AudioStreaming Interface Descriptor:
  1340.         bLength                 6
  1341.         bDescriptorType        36
  1342.         bDescriptorSubtype      2 (FORMAT_TYPE)
  1343.         bFormatType             1 (FORMAT_TYPE_I)
  1344.         bSubslotSize            2
  1345.         bBitResolution         16
  1346.       Endpoint Descriptor:
  1347.         bLength                 7
  1348.         bDescriptorType         5
  1349.         bEndpointAddress     0x04  EP 4 OUT
  1350.         bmAttributes            5
  1351.           Transfer Type            Isochronous
  1352.           Synch Type               Asynchronous
  1353.           Usage Type               Data
  1354.         wMaxPacketSize     0x0308  1x 776 bytes
  1355.         bInterval               1
  1356.         AudioStreaming Endpoint Descriptor:
  1357.           bLength                 8
  1358.           bDescriptorType        37
  1359.           bDescriptorSubtype      1 (EP_GENERAL)
  1360.           bmAttributes         0x00
  1361.           bmControls           0x00
  1362.           bLockDelayUnits         0 Undefined
  1363.           wLockDelay         0x0000
  1364.       Endpoint Descriptor:
  1365.         bLength                 7
  1366.         bDescriptorType         5
  1367.         bEndpointAddress     0x84  EP 4 IN
  1368.         bmAttributes           17
  1369.           Transfer Type            Isochronous
  1370.           Synch Type               None
  1371.           Usage Type               Feedback
  1372.         wMaxPacketSize     0x0004  1x 4 bytes
  1373.         bInterval               1
  1374.     Interface Descriptor:
  1375.       bLength                 9
  1376.       bDescriptorType         4
  1377.       bInterfaceNumber        3
  1378.       bAlternateSetting       2
  1379.       bNumEndpoints           2
  1380.       bInterfaceClass         1 Audio
  1381.       bInterfaceSubClass      2 Streaming
  1382.       bInterfaceProtocol     32 
  1383.       iInterface              0 
  1384.       AudioStreaming Interface Descriptor:
  1385.         bLength                16
  1386.         bDescriptorType        36
  1387.         bDescriptorSubtype      1 (AS_GENERAL)
  1388.         bTerminalLink          17
  1389.         bmControls           0x05
  1390.           Active Alternate Setting Control (read-only)
  1391.           Valid Alternate Setting Control (read-only)
  1392.         bFormatType             1
  1393.         bmFormats          0x00000001
  1394.           PCM
  1395.         bNrChannels             2
  1396.         bmChannelConfig    0x00000003
  1397.           Front Left (FL)
  1398.           Front Right (FR)
  1399.         iChannelNames           0 
  1400.       AudioStreaming Interface Descriptor:
  1401.         bLength                 6
  1402.         bDescriptorType        36
  1403.         bDescriptorSubtype      2 (FORMAT_TYPE)
  1404.         bFormatType             1 (FORMAT_TYPE_I)
  1405.         bSubslotSize            3
  1406.         bBitResolution         24
  1407.       Endpoint Descriptor:
  1408.         bLength                 7
  1409.         bDescriptorType         5
  1410.         bEndpointAddress     0x04  EP 4 OUT
  1411.         bmAttributes            5
  1412.           Transfer Type            Isochronous
  1413.           Synch Type               Asynchronous
  1414.           Usage Type               Data
  1415.         wMaxPacketSize     0x0308  1x 776 bytes
  1416.         bInterval               1
  1417.         AudioStreaming Endpoint Descriptor:
  1418.           bLength                 8
  1419.           bDescriptorType        37
  1420.           bDescriptorSubtype      1 (EP_GENERAL)
  1421.           bmAttributes         0x00
  1422.           bmControls           0x00
  1423.           bLockDelayUnits         0 Undefined
  1424.           wLockDelay         0x0000
  1425.       Endpoint Descriptor:
  1426.         bLength                 7
  1427.         bDescriptorType         5
  1428.         bEndpointAddress     0x84  EP 4 IN
  1429.         bmAttributes           17
  1430.           Transfer Type            Isochronous
  1431.           Synch Type               None
  1432.           Usage Type               Feedback
  1433.         wMaxPacketSize     0x0004  1x 4 bytes
  1434.         bInterval               1
  1435.     Interface Descriptor:
  1436.       bLength                 9
  1437.       bDescriptorType         4
  1438.       bInterfaceNumber        3
  1439.       bAlternateSetting       3
  1440.       bNumEndpoints           2
  1441.       bInterfaceClass         1 Audio
  1442.       bInterfaceSubClass      2 Streaming
  1443.       bInterfaceProtocol     32 
  1444.       iInterface              0 
  1445.       AudioStreaming Interface Descriptor:
  1446.         bLength                16
  1447.         bDescriptorType        36
  1448.         bDescriptorSubtype      1 (AS_GENERAL)
  1449.         bTerminalLink          17
  1450.         bmControls           0x05
  1451.           Active Alternate Setting Control (read-only)
  1452.           Valid Alternate Setting Control (read-only)
  1453.         bFormatType             1
  1454.         bmFormats          0x00000001
  1455.           PCM
  1456.         bNrChannels             2
  1457.         bmChannelConfig    0x00000003
  1458.           Front Left (FL)
  1459.           Front Right (FR)
  1460.         iChannelNames           0 
  1461.       AudioStreaming Interface Descriptor:
  1462.         bLength                 6
  1463.         bDescriptorType        36
  1464.         bDescriptorSubtype      2 (FORMAT_TYPE)
  1465.         bFormatType             1 (FORMAT_TYPE_I)
  1466.         bSubslotSize            4
  1467.         bBitResolution         32
  1468.       Endpoint Descriptor:
  1469.         bLength                 7
  1470.         bDescriptorType         5
  1471.         bEndpointAddress     0x04  EP 4 OUT
  1472.         bmAttributes            5
  1473.           Transfer Type            Isochronous
  1474.           Synch Type               Asynchronous
  1475.           Usage Type               Data
  1476.         wMaxPacketSize     0x0308  1x 776 bytes
  1477.         bInterval               1
  1478.         AudioStreaming Endpoint Descriptor:
  1479.           bLength                 8
  1480.           bDescriptorType        37
  1481.           bDescriptorSubtype      1 (EP_GENERAL)
  1482.           bmAttributes         0x00
  1483.           bmControls           0x00
  1484.           bLockDelayUnits         0 Undefined
  1485.           wLockDelay         0x0000
  1486.       Endpoint Descriptor:
  1487.         bLength                 7
  1488.         bDescriptorType         5
  1489.         bEndpointAddress     0x84  EP 4 IN
  1490.         bmAttributes           17
  1491.           Transfer Type            Isochronous
  1492.           Synch Type               None
  1493.           Usage Type               Feedback
  1494.         wMaxPacketSize     0x0004  1x 4 bytes
  1495.         bInterval               1
  1496. Device Qualifier (for other device speed):   //Device_Qualifier Descriptor
  1497.   bLength                10
  1498.   bDescriptorType         6
  1499.   bcdUSB               2.00
  1500.   bDeviceClass          239 Miscellaneous Device
  1501.   bDeviceSubClass         2 
  1502.   bDeviceProtocol         1 Interface Association
  1503.   bMaxPacketSize0        64
  1504.   bNumConfigurations      1
  1505. Device Status:     0x0001
  1506.   Self Powered
USB中文网 2023-01-18 11:10:13 编辑

从这里来看：

  1.  AudioControl Interface Descriptor:
  2.         bLength                 9
  3.         bDescriptorType        36
  4.         bDescriptorSubtype      1 (HEADER)        // Class-Specific AC Interface Header Descriptor
  5.         bcdADC               2.00
  6.         bCategory               4
  7.         wTotalLength       0x00b4                        //类特定描述符总长度
  8.         bmControls           0x00

你使用的是UAC2.0规范，而不是UAC1.0
UAC2.0规范是从Windows10从1703版本才开始支持UAC2.0，所以windows10 1703之前的版本也只支持UAC1.0。
所以你需要查阅的是UAC2.0的规范文档。
UAC2.0和UAC1.0虽然是版本上的升级，但是改变很大，可以当成是2个规范来对待。