puleglot wrote: ↑Sun Mar 15, 2020 9:30 am
This sounds like a synchronization issue. This could be an incorrect synchronization type in usb descriptors (like with Scarlett Solo 2nd gen), or maybe the device is using an implicit feedback. Could you post lsusb -v -d output for this device?
aplay -l
Code: Select all
**** List of PLAYBACK Hardware Devices ****
card 0: D2 [Xonar D2], device 0: Multichannel [Multichannel]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: D2 [Xonar D2], device 1: Digital [Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 1: ALC892 Digital [ALC892 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 4: USB [Scarlett 18i20 USB], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
aplay -L
Code: Select all
null
Discard all samples (playback) or generate zero samples (capture)
pulse
PulseAudio Sound Server
default
Default ALSA Output (currently PulseAudio Sound Server)
sysdefault:CARD=D2
Xonar D2, Multichannel
Default Audio Device
front:CARD=D2,DEV=0
Xonar D2, Multichannel
Front speakers
surround21:CARD=D2,DEV=0
Xonar D2, Multichannel
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=D2,DEV=0
Xonar D2, Multichannel
4.0 Surround output to Front and Rear speakers
surround41:CARD=D2,DEV=0
Xonar D2, Multichannel
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=D2,DEV=0
Xonar D2, Multichannel
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=D2,DEV=0
Xonar D2, Multichannel
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=D2,DEV=0
Xonar D2, Multichannel
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=D2,DEV=0
Xonar D2, Multichannel
IEC958 (S/PDIF) Digital Audio Output
sysdefault:CARD=PCH
HDA Intel PCH, ALC892 Analog
Default Audio Device
front:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
Front speakers
surround21:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=PCH,DEV=0
HDA Intel PCH, ALC892 Digital
IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=NVidia,DEV=0
HDA NVidia, HDMI 0
HDMI Audio Output
hdmi:CARD=NVidia,DEV=1
HDA NVidia, HDMI 1
HDMI Audio Output
hdmi:CARD=NVidia,DEV=2
HDA NVidia, HDMI 2
HDMI Audio Output
hdmi:CARD=NVidia,DEV=3
HDA NVidia, HDMI 3
HDMI Audio Output
sysdefault:CARD=USB
Scarlett 18i20 USB, USB Audio
Default Audio Device
front:CARD=USB,DEV=0
Scarlett 18i20 USB, USB Audio
Front speakers
surround21:CARD=USB,DEV=0
Scarlett 18i20 USB, USB Audio
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=USB,DEV=0
Scarlett 18i20 USB, USB Audio
4.0 Surround output to Front and Rear speakers
surround41:CARD=USB,DEV=0
Scarlett 18i20 USB, USB Audio
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=USB,DEV=0
Scarlett 18i20 USB, USB Audio
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=USB,DEV=0
Scarlett 18i20 USB, USB Audio
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=USB,DEV=0
Scarlett 18i20 USB, USB Audio
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=USB,DEV=0
Scarlett 18i20 USB, USB Audio
IEC958 (S/PDIF) Digital Audio Output
pacmd list-sinks (the same issue occurs when device is used with pulseaudio or even plain ALSA)
Code: Select all
index: 3
name: <alsa_output.usb-Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E-00-USB.multichannel>
driver: <module-alsa-card.c>
flags: HARDWARE DECIBEL_VOLUME LATENCY FLAT_VOLUME
state: SUSPENDED
suspend cause: IDLE
priority: 9040
volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB, rear-left: 65536 / 100% / 0.00 dB, rear-right: 65536 / 100% / 0.00 dB, front-center: 65536 / 100% / 0.00 dB, lfe: 65536 / 100% / 0.00 dB, side-left: 65536 / 100% / 0.00 dB, side-right: 65536 / 100% / 0.00 dB, aux0: 65536 / 100% / 0.00 dB, aux1: 65536 / 100% / 0.00 dB
balance 0.00
base volume: 65536 / 100% / 0.00 dB
volume steps: 65537
muted: no
current latency: 0.00 ms
max request: 0 KiB
max rewind: 0 KiB
monitor source: 6
sample spec: s32le 10ch 96000Hz
channel map: front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right,aux0,aux1
used by: 0
linked by: 0
fixed latency: 100.00 ms
card: 3 <alsa_card.usb-Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E-00-USB>
module: 30
properties:
alsa.resolution_bits = "32"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "USB Audio"
alsa.id = "USB Audio"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "4"
alsa.card_name = "Scarlett 18i20 USB"
alsa.long_card_name = "Focusrite Scarlett 18i20 USB at usb-0000:00:1d.0-1.6, high speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:00:1d.0-usb-0:1.6:1.0"
sysfs.path = "/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.6/2-1.6:1.0/sound/card4"
udev.id = "usb-Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E-00-USB"
device.bus = "usb"
device.vendor.id = "1235"
device.vendor.name = "Focusrite-Novation"
device.product.id = "8215"
device.product.name = "Scarlett 18i20 USB"
device.serial = "Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E"
device.string = "hw:4"
device.buffering.buffer_size = "384000"
device.buffering.fragment_size = "96000"
device.access_mode = "mmap"
device.profile.name = "multichannel"
device.profile.description = "Multichannel"
device.description = "Scarlett 18i20 USB Multichannel"
alsa.mixer_name = "USB Mixer"
alsa.components = "USB1235:8215"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-usb"
pacmd list-sources
Code: Select all
index: 6
name: <alsa_output.usb-Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E-00-USB.multichannel.monitor>
driver: <module-alsa-card.c>
flags: DECIBEL_VOLUME LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 1040
volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB, rear-left: 65536 / 100% / 0.00 dB, rear-right: 65536 / 100% / 0.00 dB, front-center: 65536 / 100% / 0.00 dB, lfe: 65536 / 100% / 0.00 dB, side-left: 65536 / 100% / 0.00 dB, side-right: 65536 / 100% / 0.00 dB, aux0: 65536 / 100% / 0.00 dB, aux1: 65536 / 100% / 0.00 dB
balance 0.00
base volume: 65536 / 100% / 0.00 dB
volume steps: 65537
muted: no
current latency: 0.00 ms
max rewind: 0 KiB
sample spec: s32le 10ch 96000Hz
channel map: front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right,aux0,aux1
used by: 0
linked by: 0
fixed latency: 100.00 ms
monitor_of: 3
card: 3 <alsa_card.usb-Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E-00-USB>
module: 30
properties:
device.description = "Monitor of Scarlett 18i20 USB Multichannel"
device.class = "monitor"
alsa.card = "4"
alsa.card_name = "Scarlett 18i20 USB"
alsa.long_card_name = "Focusrite Scarlett 18i20 USB at usb-0000:00:1d.0-1.6, high speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:00:1d.0-usb-0:1.6:1.0"
sysfs.path = "/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.6/2-1.6:1.0/sound/card4"
udev.id = "usb-Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E-00-USB"
device.bus = "usb"
device.vendor.id = "1235"
device.vendor.name = "Focusrite-Novation"
device.product.id = "8215"
device.product.name = "Scarlett 18i20 USB"
device.serial = "Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E"
device.string = "4"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-usb"
index: 7
name: <alsa_input.usb-Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E-00-USB.multichannel>
driver: <module-alsa-card.c>
flags: HARDWARE DECIBEL_VOLUME LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 9040
volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB, rear-left: 65536 / 100% / 0.00 dB, rear-right: 65536 / 100% / 0.00 dB, front-center: 65536 / 100% / 0.00 dB, lfe: 65536 / 100% / 0.00 dB, side-left: 65536 / 100% / 0.00 dB, side-right: 65536 / 100% / 0.00 dB, aux0: 65536 / 100% / 0.00 dB, aux1: 65536 / 100% / 0.00 dB
balance 0.00
base volume: 65536 / 100% / 0.00 dB
volume steps: 65537
muted: no
current latency: 0.00 ms
max rewind: 0 KiB
sample spec: s32le 10ch 96000Hz
channel map: front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right,aux0,aux1
used by: 0
linked by: 0
fixed latency: 100.00 ms
card: 3 <alsa_card.usb-Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E-00-USB>
module: 30
properties:
alsa.resolution_bits = "32"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "USB Audio"
alsa.id = "USB Audio"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "4"
alsa.card_name = "Scarlett 18i20 USB"
alsa.long_card_name = "Focusrite Scarlett 18i20 USB at usb-0000:00:1d.0-1.6, high speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:00:1d.0-usb-0:1.6:1.0"
sysfs.path = "/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.6/2-1.6:1.0/sound/card4"
udev.id = "usb-Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E-00-USB"
device.bus = "usb"
device.vendor.id = "1235"
device.vendor.name = "Focusrite-Novation"
device.product.id = "8215"
device.product.name = "Scarlett 18i20 USB"
device.serial = "Focusrite_Scarlett_18i20_USB_P993THZ9A04D6E"
device.string = "hw:4"
device.buffering.buffer_size = "384000"
device.buffering.fragment_size = "96000"
device.access_mode = "mmap"
device.profile.name = "multichannel"
device.profile.description = "Multichannel"
device.description = "Scarlett 18i20 USB Multichannel"
alsa.mixer_name = "USB Mixer"
alsa.components = "USB1235:8215"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-usb"
and finally lsusb -v -d
Code: Select all
Bus 002 Device 006: ID 1235:8215 Novation EMS
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x1235 Novation EMS
idProduct 0x8215
bcdDevice 6.1b
iManufacturer 1
iProduct 3
iSerial 2
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 643
bNumInterfaces 6
bConfigurationValue 1
iConfiguration 9
bmAttributes 0xc0
Self Powered
MaxPower 0mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 3
bFunctionClass 1 Audio
bFunctionSubClass 0
bFunctionProtocol 32
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
bInterfaceProtocol 32
iInterface 3
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 2.00
bCategory 8
wTotalLength 191
bmControl 0x00
AudioControl Interface Descriptor:
bLength 8
bDescriptorType 36
bDescriptorSubtype 10 (CLOCK_SOURCE)
bClockID 41
bmAttributes 0x03 Internal programmable Clock
bmControls 0x07
Clock Frequency Control (read/write)
Clock Validity Control (read-only)
bAssocTerminal 0
iClockSource 9
AudioControl Interface Descriptor:
bLength 8
bDescriptorType 36
bDescriptorSubtype 10 (CLOCK_SOURCE)
bClockID 42
bmAttributes 0x00 External Clock
bmControls 0x07
Clock Frequency Control (read/write)
Clock Validity Control (read-only)
bAssocTerminal 0
iClockSource 11
AudioControl Interface Descriptor:
bLength 8
bDescriptorType 36
bDescriptorSubtype 10 (CLOCK_SOURCE)
bClockID 43
bmAttributes 0x00 External Clock
bmControls 0x07
Clock Frequency Control (read/write)
Clock Validity Control (read-only)
bAssocTerminal 0
iClockSource 12
AudioControl Interface Descriptor:
bLength 10
bDescriptorType 36
bDescriptorSubtype 11 (CLOCK_SELECTOR)
bUnitID 40
bNrInPins 3
baCSourceID( 0) 41
baCSourceID( 1) 42
baCSourceID( 2) 43
bmControls 0x03
Clock Selector Control (read/write)
iClockSelector 8
AudioControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 2
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bCSourceID 40
bNrChannels 20
bmChannelConfig 0x00000000
bmControls 0x0000
iChannelNames 19
iTerminal 6
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 20
wTerminalType 0x0301 Speaker
bAssocTerminal 0
bSourceID 2
bCSourceID 40
bmControls 0x0000
iTerminal 0
AudioControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0201 Microphone
bAssocTerminal 0
bCSourceID 40
bNrChannels 20
bmChannelConfig 0x00000000
bmControls 0x0000
iChannelNames 39
iTerminal 0
AudioControl Interface Descriptor:
bLength 90
bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
bUnitID 11
bSourceID 1
bmaControls( 0) 0x00000000
bmaControls( 1) 0x00000000
bmaControls( 2) 0x00000000
bmaControls( 3) 0x00000000
bmaControls( 4) 0x00000000
bmaControls( 5) 0x00000000
bmaControls( 6) 0x00000000
bmaControls( 7) 0x00000000
bmaControls( 8) 0x00000000
bmaControls( 9) 0x00000000
bmaControls(10) 0x00000000
bmaControls(11) 0x00000000
bmaControls(12) 0x00000000
bmaControls(13) 0x00000000
bmaControls(14) 0x00000000
bmaControls(15) 0x00000000
bmaControls(16) 0x00000000
bmaControls(17) 0x00000000
bmaControls(18) 0x00000000
bmaControls(19) 0x00000000
bmaControls(20) 0x00000000
iFeature 0
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 22
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 11
bCSourceID 40
bmControls 0x0000
iTerminal 7
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 4
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 4
AudioStreaming Interface Descriptor:
bLength 16
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 2
bmControls 0x04
Valid Alternate Setting Control (read-only)
bFormatType 1
bmFormats 0x00000001
PCM
bNrChannels 20
bmChannelConfig 0x00000000
iChannelNames 19
AudioStreaming Interface Descriptor:
bLength 10
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bSubslotSize 4
bBitResolution 24
junk at descriptor end: 80 bb 00 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0230 1x 560 bytes
bInterval 1
AudioControl Endpoint Descriptor:
bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
bLockDelayUnits 1 Milliseconds
wLockDelay 512
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 2
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 4
AudioStreaming Interface Descriptor:
bLength 16
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 2
bmControls 0x04
Valid Alternate Setting Control (read-only)
bFormatType 1
bmFormats 0x00000001
PCM
bNrChannels 18
bmChannelConfig 0x00000000
iChannelNames 19
AudioStreaming Interface Descriptor:
bLength 10
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bSubslotSize 4
bBitResolution 24
junk at descriptor end: 00 77 01 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x03a8 1x 936 bytes
bInterval 1
AudioControl Endpoint Descriptor:
bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
bLockDelayUnits 1 Milliseconds
wLockDelay 512
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 3
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 4
AudioStreaming Interface Descriptor:
bLength 16
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 2
bmControls 0x04
Valid Alternate Setting Control (read-only)
bFormatType 1
bmFormats 0x00000001
PCM
bNrChannels 10
bmChannelConfig 0x00000000
iChannelNames 19
AudioStreaming Interface Descriptor:
bLength 10
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bSubslotSize 4
bBitResolution 24
junk at descriptor end: 00 ee 02 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x03e8 1x 1000 bytes
bInterval 1
AudioControl Endpoint Descriptor:
bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
bLockDelayUnits 1 Milliseconds
wLockDelay 512
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 5
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 5
AudioStreaming Interface Descriptor:
bLength 16
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 22
bmControls 0x04
Valid Alternate Setting Control (read-only)
bFormatType 1
bmFormats 0x00000001
PCM
bNrChannels 20
bmChannelConfig 0x00000000
iChannelNames 39
AudioStreaming Interface Descriptor:
bLength 10
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bSubslotSize 4
bBitResolution 24
junk at descriptor end: 80 bb 00 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 37
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Implicit feedback Data
wMaxPacketSize 0x0230 1x 560 bytes
bInterval 1
AudioControl Endpoint Descriptor:
bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
bLockDelayUnits 1 Milliseconds
wLockDelay 512
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 2
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 5
AudioStreaming Interface Descriptor:
bLength 16
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 22
bmControls 0x04
Valid Alternate Setting Control (read-only)
bFormatType 1
bmFormats 0x00000001
PCM
bNrChannels 18
bmChannelConfig 0x00000000
iChannelNames 39
AudioStreaming Interface Descriptor:
bLength 10
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bSubslotSize 4
bBitResolution 24
junk at descriptor end: 00 77 01 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 37
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Implicit feedback Data
wMaxPacketSize 0x03a8 1x 936 bytes
bInterval 1
AudioControl Endpoint Descriptor:
bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
bLockDelayUnits 1 Milliseconds
wLockDelay 512
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 3
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 32
iInterface 5
AudioStreaming Interface Descriptor:
bLength 16
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 22
bmControls 0x04
Valid Alternate Setting Control (read-only)
bFormatType 1
bmFormats 0x00000001
PCM
bNrChannels 10
bmChannelConfig 0x00000000
iChannelNames 39
AudioStreaming Interface Descriptor:
bLength 10
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bSubslotSize 4
bBitResolution 24
junk at descriptor end: 00 ee 02 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 37
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Implicit feedback Data
wMaxPacketSize 0x03e8 1x 1000 bytes
bInterval 1
AudioControl Endpoint Descriptor:
bLength 8
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bmControls 0x00
bLockDelayUnits 1 Milliseconds
wLockDelay 512
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 1
bInterfaceProtocol 32
iInterface 15
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
bInterfaceProtocol 0
iInterface 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 9
bInCollection 1
baInterfaceNr( 0) 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 5
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 1 Audio
bInterfaceSubClass 3 MIDI Streaming
bInterfaceProtocol 0
iInterface 0
MIDIStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 65
MIDIStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 2 (MIDI_IN_JACK)
bJackType 1 Embedded
bJackID 1
iJack 0
MIDIStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 2 (MIDI_IN_JACK)
bJackType 2 External
bJackID 2
iJack 14
MIDIStreaming Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (MIDI_OUT_JACK)
bJackType 1 Embedded
bJackID 3
bNrInputPins 1
baSourceID( 0) 2
BaSourcePin( 0) 1
iJack 0
MIDIStreaming Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (MIDI_OUT_JACK)
bJackType 2 External
bJackID 4
bNrInputPins 1
baSourceID( 0) 1
BaSourcePin( 0) 1
iJack 13
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
bRefresh 0
bSynchAddress 0
MIDIStreaming Endpoint Descriptor:
bLength 5
bDescriptorType 37
bDescriptorSubtype 1 (GENERAL)
bNumEmbMIDIJack 1
baAssocJackID( 0) 1
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
bRefresh 0
bSynchAddress 0
MIDIStreaming Endpoint Descriptor:
bLength 5
bDescriptorType 37
bDescriptorSubtype 1 (GENERAL)
bNumEmbMIDIJack 1
baAssocJackID( 0) 3