!!################################ !!ALSA Information Script v 0.4.65 !!################################ !!Script ran on: Wed Dec 30 20:37:48 UTC 2020 !!Linux Distribution !!------------------ ID_LIKE=debian !!DMI Information !!--------------- Manufacturer: Product Name: Product Version: Firmware Version: System SKU: Board Vendor: Board Name: !!ACPI Device Status Information !!--------------- !!Kernel Information !!------------------ Kernel release: 5.4.79-v7 Operating System: GNU/Linux Architecture: armv7l Processor: unknown SMP Enabled: Yes !!ALSA Version !!------------ Driver version: k5.4.79-v7 Library version: 1.1.8 Utilities version: 1.1.8 !!Loaded ALSA modules !!------------------- snd_bcm2835 snd_bcm2835 snd_usb_audio !!Sound Servers on this system !!---------------------------- No sound servers found. !!Soundcards recognised by ALSA !!----------------------------- 0 [b1 ]: bcm2835_hdmi - bcm2835 HDMI 1 bcm2835 HDMI 1 1 [Headphones ]: bcm2835_headphonbcm2835 Headphones - bcm2835 Headphones bcm2835 Headphones 2 [C170 ]: USB-Audio - Webcam C170 Webcam C170 at usb-3f980000.usb-1.3, high speed !!PCI Soundcards installed in the system !!-------------------------------------- !!Modprobe options (Sound related) !!-------------------------------- snd_pcsp: index=-2 snd_usb_audio: index=-2 snd_atiixp_modem: index=-2 snd_intel8x0m: index=-2 snd_via82xx_modem: index=-2 snd_bcm2835: enable_compat_alsa=0 snd_bcm2835: enable_hdmi=1 !!Loaded sound module options !!--------------------------- !!Module: snd_bcm2835 enable_compat_alsa : N enable_hdmi : Y enable_headphones : Y force_bulk : N !!Module: snd_bcm2835 enable_compat_alsa : N enable_hdmi : Y enable_headphones : Y force_bulk : N !!Module: snd_usb_audio autoclock : Y device_setup : 0,0,0,0,0,0,0,0 enable : Y,Y,Y,Y,Y,Y,Y,Y id : (null),(null),(null),(null),(null),(null),(null),(null) ignore_ctl_error : N index : -2,-1,-1,-1,-1,-1,-1,-1 pid : -1,-1,-1,-1,-1,-1,-1,-1 quirk_alias : (null),(null),(null),(null),(null),(null),(null),(null) use_vmalloc : Y vid : -1,-1,-1,-1,-1,-1,-1,-1 !!USB Descriptors !!--------------- --startcollapse-- Bus 001 Device 004: ID 046d:082b Logitech, Inc. Webcam C170 Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 239 Miscellaneous Device bDeviceSubClass 2 bDeviceProtocol 1 Interface Association bMaxPacketSize0 64 idVendor 0x046d Logitech, Inc. idProduct 0x082b Webcam C170 bcdDevice 28.25 iManufacturer 1 iProduct 2 Webcam C170 iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 0x046c bNumInterfaces 4 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 500mA Interface Association: bLength 8 bDescriptorType 11 bFirstInterface 0 bInterfaceCount 2 bFunctionClass 14 Video bFunctionSubClass 3 Video Interface Collection bFunctionProtocol 0 iFunction 4 Webcam C170 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 14 Video bInterfaceSubClass 1 Video Control bInterfaceProtocol 0 iInterface 4 Webcam C170 VideoControl Interface Descriptor: bLength 13 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdUVC 1.00 wTotalLength 0x004f dwClockFrequency 30.000000MHz bInCollection 1 baInterfaceNr( 0) 1 VideoControl Interface Descriptor: bLength 28 bDescriptorType 36 bDescriptorSubtype 6 (EXTENSION_UNIT) bUnitID 6 guidExtensionCode {68bbd0b0-61a4-4b83-90b7-a6215f3c4f70} bNumControl 24 bNrPins 1 baSourceID( 0) 2 bControlSize 3 bmControls( 0) 0xff bmControls( 1) 0xff bmControls( 2) 0xff iExtension 0 VideoControl Interface Descriptor: bLength 18 bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 1 wTerminalType 0x0201 Camera Sensor bAssocTerminal 0 iTerminal 0 wObjectiveFocalLengthMin 0 wObjectiveFocalLengthMax 0 wOcularFocalLength 0 bControlSize 3 bmControls 0x00000a0e Auto-Exposure Mode Auto-Exposure Priority Exposure Time (Absolute) Zoom (Absolute) PanTilt (Absolute) VideoControl Interface Descriptor: bLength 11 bDescriptorType 36 bDescriptorSubtype 5 (PROCESSING_UNIT) Warning: Descriptor too short bUnitID 2 bSourceID 1 wMaxMultiplier 0 bControlSize 2 bmControls 0x0000157f Brightness Contrast Hue Saturation Sharpness Gamma White Balance Temperature Backlight Compensation Power Line Frequency White Balance Temperature, Auto iProcessing 0 bmVideoStandards 0x09 None SECAM - 625/50 VideoControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (OUTPUT_TERMINAL) bTerminalID 3 wTerminalType 0x0101 USB Streaming bAssocTerminal 0 bSourceID 2 iTerminal 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0010 1x 16 bytes bInterval 7 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 14 Video bInterfaceSubClass 2 Video Streaming bInterfaceProtocol 0 iInterface 4 Webcam C170 VideoStreaming Interface Descriptor: bLength 15 bDescriptorType 36 bDescriptorSubtype 1 (INPUT_HEADER) bNumFormats 2 wTotalLength 0x02e9 bEndPointAddress 130 bmInfo 0 bTerminalLink 3 bStillCaptureMethod 1 bTriggerSupport 1 bTriggerUsage 0 bControlSize 1 bmaControls( 0) 0 bmaControls( 1) 0 VideoStreaming Interface Descriptor: bLength 27 bDescriptorType 36 bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED) bFormatIndex 1 bNumFrameDescriptors 9 guidFormat {32595559-0000-0010-8000-00aa00389b71} bBitsPerPixel 16 bDefaultFrameIndex 1 bAspectRatioX 0 bAspectRatioY 0 bmInterlaceFlags 0x00 Interlaced stream or variable: No Fields per frame: 2 fields Field 1 first: No Field pattern: Field 1 only bCopyProtect 0 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 5 (FRAME_UNCOMPRESSED) bFrameIndex 1 bmCapabilities 0x01 Still image supported wWidth 640 wHeight 480 dwMinBitRate 73728000 dwMaxBitRate 147456000 dwMaxVideoFrameBufferSize 614400 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 5 (FRAME_UNCOMPRESSED) bFrameIndex 2 bmCapabilities 0x01 Still image supported wWidth 352 wHeight 288 dwMinBitRate 24330240 dwMaxBitRate 48660480 dwMaxVideoFrameBufferSize 202752 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 5 (FRAME_UNCOMPRESSED) bFrameIndex 3 bmCapabilities 0x01 Still image supported wWidth 320 wHeight 240 dwMinBitRate 18432000 dwMaxBitRate 36864000 dwMaxVideoFrameBufferSize 153600 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 5 (FRAME_UNCOMPRESSED) bFrameIndex 4 bmCapabilities 0x01 Still image supported wWidth 176 wHeight 144 dwMinBitRate 6082560 dwMaxBitRate 12165120 dwMaxVideoFrameBufferSize 50688 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 5 (FRAME_UNCOMPRESSED) bFrameIndex 5 bmCapabilities 0x01 Still image supported wWidth 160 wHeight 120 dwMinBitRate 4608000 dwMaxBitRate 9216000 dwMaxVideoFrameBufferSize 38400 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 5 (FRAME_UNCOMPRESSED) bFrameIndex 6 bmCapabilities 0x01 Still image supported wWidth 544 wHeight 288 dwMinBitRate 37601280 dwMaxBitRate 75202560 dwMaxVideoFrameBufferSize 313344 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 5 (FRAME_UNCOMPRESSED) bFrameIndex 7 bmCapabilities 0x01 Still image supported wWidth 432 wHeight 240 dwMinBitRate 24883200 dwMaxBitRate 49766400 dwMaxVideoFrameBufferSize 207360 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 5 (FRAME_UNCOMPRESSED) bFrameIndex 8 bmCapabilities 0x01 Still image supported wWidth 320 wHeight 176 dwMinBitRate 13516800 dwMaxBitRate 27033600 dwMaxVideoFrameBufferSize 112640 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 5 (FRAME_UNCOMPRESSED) bFrameIndex 9 bmCapabilities 0x01 Still image supported wWidth 640 wHeight 360 dwMinBitRate 55296000 dwMaxBitRate 110592000 dwMaxVideoFrameBufferSize 460800 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 6 bDescriptorType 36 bDescriptorSubtype 13 (COLORFORMAT) bColorPrimaries 1 (BT.709,sRGB) bTransferCharacteristics 1 (BT.709) bMatrixCoefficients 4 (SMPTE 170M (BT.601)) VideoStreaming Interface Descriptor: bLength 11 bDescriptorType 36 bDescriptorSubtype 6 (FORMAT_MJPEG) bFormatIndex 2 bNumFrameDescriptors 11 bFlags 1 Fixed-size samples: Yes bDefaultFrameIndex 1 bAspectRatioX 0 bAspectRatioY 0 bmInterlaceFlags 0x00 Interlaced stream or variable: No Fields per frame: 1 fields Field 1 first: No Field pattern: Field 1 only bCopyProtect 0 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 7 (FRAME_MJPEG) bFrameIndex 1 bmCapabilities 0x01 Still image supported wWidth 640 wHeight 480 dwMinBitRate 110592000 dwMaxBitRate 221184000 dwMaxVideoFrameBufferSize 921600 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 7 (FRAME_MJPEG) bFrameIndex 2 bmCapabilities 0x01 Still image supported wWidth 352 wHeight 288 dwMinBitRate 36495360 dwMaxBitRate 72990720 dwMaxVideoFrameBufferSize 304128 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 7 (FRAME_MJPEG) bFrameIndex 3 bmCapabilities 0x01 Still image supported wWidth 320 wHeight 240 dwMinBitRate 27648000 dwMaxBitRate 55296000 dwMaxVideoFrameBufferSize 230400 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 7 (FRAME_MJPEG) bFrameIndex 4 bmCapabilities 0x01 Still image supported wWidth 176 wHeight 144 dwMinBitRate 9123840 dwMaxBitRate 18247680 dwMaxVideoFrameBufferSize 76032 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 7 (FRAME_MJPEG) bFrameIndex 5 bmCapabilities 0x01 Still image supported wWidth 160 wHeight 120 dwMinBitRate 6912000 dwMaxBitRate 13824000 dwMaxVideoFrameBufferSize 57600 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 7 (FRAME_MJPEG) bFrameIndex 6 bmCapabilities 0x01 Still image supported wWidth 544 wHeight 288 dwMinBitRate 56401920 dwMaxBitRate 112803840 dwMaxVideoFrameBufferSize 470016 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 7 (FRAME_MJPEG) bFrameIndex 7 bmCapabilities 0x01 Still image supported wWidth 432 wHeight 240 dwMinBitRate 37324800 dwMaxBitRate 74649600 dwMaxVideoFrameBufferSize 311040 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 7 (FRAME_MJPEG) bFrameIndex 8 bmCapabilities 0x01 Still image supported wWidth 320 wHeight 176 dwMinBitRate 20275200 dwMaxBitRate 40550400 dwMaxVideoFrameBufferSize 168960 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 7 (FRAME_MJPEG) bFrameIndex 9 bmCapabilities 0x01 Still image supported wWidth 640 wHeight 360 dwMinBitRate 82944000 dwMaxBitRate 165888000 dwMaxVideoFrameBufferSize 691200 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 7 (FRAME_MJPEG) bFrameIndex 10 bmCapabilities 0x01 Still image supported wWidth 800 wHeight 480 dwMinBitRate 138240000 dwMaxBitRate 276480000 dwMaxVideoFrameBufferSize 1152000 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 34 bDescriptorType 36 bDescriptorSubtype 7 (FRAME_MJPEG) bFrameIndex 11 bmCapabilities 0x01 Still image supported wWidth 1024 wHeight 768 dwMinBitRate 283115520 dwMaxBitRate 566231040 dwMaxVideoFrameBufferSize 2359296 dwDefaultFrameInterval 333333 bFrameIntervalType 2 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 666666 VideoStreaming Interface Descriptor: bLength 6 bDescriptorType 36 bDescriptorSubtype 13 (COLORFORMAT) bColorPrimaries 1 (BT.709,sRGB) bTransferCharacteristics 1 (BT.709) bMatrixCoefficients 4 (SMPTE 170M (BT.601)) Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 1 bNumEndpoints 1 bInterfaceClass 14 Video bInterfaceSubClass 2 Video Streaming bInterfaceProtocol 0 iInterface 4 Webcam C170 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x1400 3x 1024 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 2 bNumEndpoints 1 bInterfaceClass 14 Video bInterfaceSubClass 2 Video Streaming bInterfaceProtocol 0 iInterface 4 Webcam C170 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x0c00 2x 1024 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 3 bNumEndpoints 1 bInterfaceClass 14 Video bInterfaceSubClass 2 Video Streaming bInterfaceProtocol 0 iInterface 4 Webcam C170 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x0400 1x 1024 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 4 bNumEndpoints 1 bInterfaceClass 14 Video bInterfaceSubClass 2 Video Streaming bInterfaceProtocol 0 iInterface 4 Webcam C170 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 1 Interface Association: bLength 8 bDescriptorType 11 bFirstInterface 2 bInterfaceCount 2 bFunctionClass 1 Audio bFunctionSubClass 0 bFunctionProtocol 0 iFunction 5 Webcam C170 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 1 Control Device bInterfaceProtocol 0 iInterface 5 Webcam C170 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdADC 1.00 wTotalLength 0x002b bInCollection 1 baInterfaceNr(0) 3 AudioControl Interface Descriptor: bLength 12 bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 1 wTerminalType 0x0201 Microphone bAssocTerminal 0 bNrChannels 1 wChannelConfig 0x0000 iChannelNames 0 iTerminal 0 AudioControl Interface Descriptor: bLength 13 bDescriptorType 36 bDescriptorSubtype 6 (FEATURE_UNIT) bUnitID 5 bSourceID 1 bControlSize 6 bmaControls(0) 0x000000000003 Mute Control Volume Control iFeature 0 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (OUTPUT_TERMINAL) bTerminalID 3 wTerminalType 0x0101 USB Streaming bAssocTerminal 0 bSourceID 5 iTerminal 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 3 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 0 iInterface 5 Webcam C170 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 3 bAlternateSetting 1 bNumEndpoints 1 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 0 iInterface 5 Webcam C170 AudioStreaming Interface Descriptor: bLength 7 bDescriptorType 36 bDescriptorSubtype 1 (AS_GENERAL) bTerminalLink 3 bDelay 1 frames wFormatTag 0x0001 PCM AudioStreaming Interface Descriptor: bLength 32 bDescriptorType 36 bDescriptorSubtype 2 (FORMAT_TYPE) bFormatType 1 (FORMAT_TYPE_I) bNrChannels 1 bSubframeSize 2 bBitResolution 16 bSamFreqType 8 Discrete tSamFreq[ 0] 48000 tSamFreq[ 1] 44100 tSamFreq[ 2] 24000 tSamFreq[ 3] 22050 tSamFreq[ 4] 16000 tSamFreq[ 5] 12000 tSamFreq[ 6] 11025 tSamFreq[ 7] 8000 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 13 Transfer Type Isochronous Synch Type Synchronous Usage Type Data wMaxPacketSize 0x0064 1x 100 bytes bInterval 4 bRefresh 0 bSynchAddress 0 AudioStreaming Endpoint Descriptor: bLength 7 bDescriptorType 37 bDescriptorSubtype 1 (EP_GENERAL) bmAttributes 0x01 Sampling Frequency bLockDelayUnits 1 Milliseconds wLockDelay 0x0000 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 3 bAlternateSetting 2 bNumEndpoints 1 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 0 iInterface 5 Webcam C170 AudioStreaming Interface Descriptor: bLength 7 bDescriptorType 36 bDescriptorSubtype 1 (AS_GENERAL) bTerminalLink 3 bDelay 1 frames wFormatTag 0x0001 PCM AudioStreaming Interface Descriptor: bLength 32 bDescriptorType 36 bDescriptorSubtype 2 (FORMAT_TYPE) bFormatType 1 (FORMAT_TYPE_I) bNrChannels 1 bSubframeSize 1 bBitResolution 8 bSamFreqType 8 Discrete tSamFreq[ 0] 48000 tSamFreq[ 1] 44100 tSamFreq[ 2] 24000 tSamFreq[ 3] 22050 tSamFreq[ 4] 16000 tSamFreq[ 5] 12000 tSamFreq[ 6] 11025 tSamFreq[ 7] 8000 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 13 Transfer Type Isochronous Synch Type Synchronous Usage Type Data wMaxPacketSize 0x0032 1x 50 bytes bInterval 4 bRefresh 0 bSynchAddress 0 AudioStreaming Endpoint Descriptor: bLength 7 bDescriptorType 37 bDescriptorSubtype 1 (EP_GENERAL) bmAttributes 0x01 Sampling Frequency bLockDelayUnits 1 Milliseconds wLockDelay 0x0000 Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 239 Miscellaneous Device bDeviceSubClass 2 bDeviceProtocol 1 Interface Association bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0000 (Bus Powered) --endcollapse-- !!USB Stream information !!---------------------- --startcollapse-- Webcam C170 at usb-3f980000.usb-1.3, high speed : USB Audio Capture: Status: Stop Interface 3 Altset 1 Format: S16_LE Channels: 1 Endpoint: 3 IN (SYNC) Rates: 48000, 44100, 24000, 22050, 16000, 12000, 11025, 8000 Data packet interval: 1000 us Bits: 16 Interface 3 Altset 2 Format: S8 Channels: 1 Endpoint: 3 IN (SYNC) Rates: 48000, 44100, 24000, 22050, 16000, 12000, 11025, 8000 Data packet interval: 1000 us Bits: 8 --endcollapse-- !!USB Mixer information !!--------------------- --startcollapse-- USB Mixer: usb_id=0x046d082b, ctrlif=2, ctlerr=0 Card: Webcam C170 at usb-3f980000.usb-1.3, high speed --endcollapse-- !!ALSA Device nodes !!----------------- crw-rw---- 1 root audio 116, 0 Dec 30 21:21 /dev/snd/controlC0 crw-rw---- 1 root audio 116, 32 Dec 30 21:21 /dev/snd/controlC1 crw-rw---- 1 root audio 116, 64 Dec 30 21:21 /dev/snd/controlC2 crw-rw---- 1 root audio 116, 16 Dec 30 21:21 /dev/snd/pcmC0D0p crw-rw---- 1 root audio 116, 48 Dec 30 21:21 /dev/snd/pcmC1D0p crw-rw---- 1 root audio 116, 88 Dec 30 21:21 /dev/snd/pcmC2D0c crw-rw---- 1 root audio 116, 1 Dec 30 21:21 /dev/snd/seq crw-rw---- 1 root audio 116, 33 Dec 30 21:21 /dev/snd/timer /dev/snd/by-id: total 0 drwxr-xr-x 2 root root 60 Dec 30 21:21 . drwxr-xr-x 4 root root 240 Dec 30 21:21 .. lrwxrwxrwx 1 root root 12 Dec 30 21:21 usb-_Webcam_C170-02 -> ../controlC2 /dev/snd/by-path: total 0 drwxr-xr-x 2 root root 80 Dec 30 21:21 . drwxr-xr-x 4 root root 240 Dec 30 21:21 .. lrwxrwxrwx 1 root root 12 Dec 30 21:21 platform-3f980000.usb-usb-0:1.3:1.2 -> ../controlC2 lrwxrwxrwx 1 root root 12 Dec 30 21:21 platform-bcm2835_audio -> ../controlC1 !!Aplay/Arecord output !!-------------------- APLAY **** List of PLAYBACK Hardware Devices **** card 0: b1 [bcm2835 HDMI 1], device 0: bcm2835 HDMI 1 [bcm2835 HDMI 1] Subdevices: 4/4 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 Subdevice #2: subdevice #2 Subdevice #3: subdevice #3 card 1: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones] Subdevices: 4/4 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 Subdevice #2: subdevice #2 Subdevice #3: subdevice #3 ARECORD **** List of CAPTURE Hardware Devices **** card 2: C170 [Webcam C170], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 !!Amixer output !!------------- !!-------Mixer controls for card b1 Card hw:0 'b1'/'bcm2835 HDMI 1' Mixer name : 'Broadcom Mixer' Components : '' Controls : 2 Simple ctrls : 1 Simple mixer control 'HDMI',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback -10239 - 400 Mono: Playback 0 [96%] [0.00dB] [on] !!-------Mixer controls for card Headphones Card hw:1 'Headphones'/'bcm2835 Headphones' Mixer name : 'Broadcom Mixer' Components : '' Controls : 2 Simple ctrls : 1 Simple mixer control 'Headphone',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback -10239 - 400 Mono: Playback -2000 [77%] [-20.00dB] [on] !!-------Mixer controls for card C170 Card hw:2 'C170'/'Webcam C170 at usb-3f980000.usb-1.3, high speed' Mixer name : 'USB Mixer' Components : 'USB046d:082b' Controls : 2 Simple ctrls : 0 !!Alsactl output !!-------------- --startcollapse-- state.b1 { control.1 { iface MIXER name 'HDMI Playback Volume' value 0 comment { access 'read write' type INTEGER count 1 range '-10239 - 400' dbmin -9999999 dbmax 400 dbvalue.0 0 } } control.2 { iface MIXER name 'HDMI Playback Switch' value true comment { access 'read write' type BOOLEAN count 1 } } } state.Headphones { control.1 { iface MIXER name 'Headphone Playback Volume' value -2000 comment { access 'read write' type INTEGER count 1 range '-10239 - 400' dbmin -9999999 dbmax 400 dbvalue.0 -2000 } } control.2 { iface MIXER name 'Headphone Playback Switch' value true comment { access 'read write' type BOOLEAN count 1 } } } state.C170 { control.1 { iface PCM name 'Capture Channel Map' value 0 comment { access read type INTEGER count 1 range '0 - 36' } } control.2 { iface CARD name 'Keep Interface' value false comment { access 'read write' type BOOLEAN count 1 } } } --endcollapse-- !!All Loaded Modules !!------------------ 8021q bcm2835_codec bcm2835_isp bcm2835_mmal_vchiq bcm2835_v4l2 bluetooth bnep brcmfmac brcmutil btbcm cfg80211 cmac ecc ecdh_generic fixed garp hci_uart hid_logitech_dj hid_logitech_hidpp i2c_dev ip_tables ipv6 joydev libsha256 llc mc raspberrypi_hwmon rfkill sha256_generic snd snd_bcm2835 snd_hwdep snd_pcm snd_rawmidi snd_seq_device snd_timer snd_usb_audio snd_usbmidi_lib stp uio uio_pdrv_genirq uvcvideo v4l2_mem2mem vc_sm_cma videobuf2_common videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_vmalloc videodev x_tables !!ALSA/HDA dmesg !!-------------- [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 243600 [ 0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=0 snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 bcm2708_fb.fbwidth=1440 bcm2708_fb.fbheight=900 bcm2708_fb.fbswap=1 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 console=tty1 root=PARTUUID=d637d90f-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait ipv6.disable=1 [ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes, linear) -- [ 7.167155] videodev: Linux video capture interface: v2.00 [ 7.176174] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned. [ 7.206176] bcm2835_audio bcm2835_audio: card created with 4 channels -- [ 8.096365] brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac43430-sdio.raspberrypi,3-model-b.txt failed with error -2 [ 8.115561] usbcore: registered new interface driver snd-usb-audio [ 8.321114] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43430-sdio for chip BCM43430/1 !!Packages installed !!-------------------- ii alsa-utils 1.1.8-2 armhf Utilities for configuring and using ALSA