Hi,
attached are the config descriptors and the device dump of two uaudio devices. Both exhibit distorted audio output. It sounds a little bit like clipping / not feeding enough samples fast enough...
I played around with dev.pcm.2.bitperfect=1, dev.pcm.2.play.vchans=0, dev.pcm.2.play.vchanrate and hw.snd.latency=1...10.
At some point vchanrate doesn't work anymore, it always stays at 4.0 audio, even when trying to go back to 2.0. I have to usbconfig reset the device.
Sometimes (rarely) when playing around I get clear audio output, but when I try to reproduce it (going back to default value for the last sysctl setting and then going back again to the same setting again), the audio is distorted again.
To me it sounds like some kind of buffer is not big enough or the data is not delivered fast enough to the uaudio device. But this is a dual-socket system with: CPU: Intel(R) Xeon(R) CPU E5620 @ 2.40GHz (2133.36-MHz K8-class CPU)
FreeBSD/SMP: Multiprocessor System Detected: 16 CPUs
FreeBSD/SMP: 2 package(s) x 4 core(s) x 2 hardware threads
And while playing around with uaudio the system has a load of around
1, so I would expect CPU/RAM is not an issue here.
I would expect that just attaching an uaudio device like those and using madplay/mpg123 would just work (not looking at digital output and 5.1/7.1 output for video, just the basics like stereo output of MP3). So either I do something fundamentally wrong and would need a hint with the cluebat, or I would need some description how to debug this further from the USB side...
Bye, Alexander. -- http://www.Leidinger.net alexan...@leidinger.net: PGP 0x8F31830F9F2772BF http://www.FreeBSD.org netch...@freebsd.org : PGP 0x8F31830F9F2772BF
ugen5.2: <Creative Technology SB Live 24-bit External> at usbus5, cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON (308mA) bLength = 0x0012 bDescriptorType = 0x0001 bcdUSB = 0x0110 bDeviceClass = 0x0000 <Probed by interface class> bDeviceSubClass = 0x0000 bDeviceProtocol = 0x0000 bMaxPacketSize0 = 0x0008 idVendor = 0x041e idProduct = 0x3040 bcdDevice = 0x0100 iManufacturer = 0x0001 <Creative Technology> iProduct = 0x0002 <SB Live! 24-bit External> iSerialNumber = 0x0000 <no string> bNumConfigurations = 0x0001
ugen5.2: <Creative Technology SB Live 24-bit External> at usbus5, cfg=0 md=HOST
spd=FULL (12Mbps) pwr=ON (308mA)
Configuration index 0
bLength = 0x0009
bDescriptorType = 0x0002
wTotalLength = 0x03d3
bNumInterfaces = 0x0003
bConfigurationValue = 0x0001
iConfiguration = 0x0000 <no string>
bmAttributes = 0x0080
bMaxPower = 0x009a
Interface 0
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0000
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0001
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x0a
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x0a, 0x24, 0x01, 0x00, 0x01, 0x4c, 0x00, 0x02,
0x08 | 0x01, 0x02
Additional Descriptor
bLength = 0x0c
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0c, 0x24, 0x02, 0x01, 0x01, 0x01, 0x00, 0x06,
0x08 | 0x3f, 0x00, 0x00, 0x00
Additional Descriptor
bLength = 0x0e
bDescriptorType = 0x24
bDescriptorSubType = 0x06
RAW dump:
0x00 | 0x0e, 0x24, 0x06, 0x02, 0x01, 0x01, 0x03, 0x00,
0x08 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
Additional Descriptor
bLength = 0x09
bDescriptorType = 0x24
bDescriptorSubType = 0x03
RAW dump:
0x00 | 0x09, 0x24, 0x03, 0x03, 0x01, 0x03, 0x00, 0x02,
0x08 | 0x00
Additional Descriptor
bLength = 0x0c
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0c, 0x24, 0x02, 0x04, 0x03, 0x06, 0x00, 0x02,
0x08 | 0x03, 0x00, 0x00, 0x00
Additional Descriptor
bLength = 0x0a
bDescriptorType = 0x24
bDescriptorSubType = 0x06
RAW dump:
0x00 | 0x0a, 0x24, 0x06, 0x05, 0x04, 0x01, 0x02, 0x00,
0x08 | 0x00, 0x00
Additional Descriptor
bLength = 0x09
bDescriptorType = 0x24
bDescriptorSubType = 0x03
RAW dump:
0x00 | 0x09, 0x24, 0x03, 0x06, 0x01, 0x01, 0x00, 0x05,
0x08 | 0x00
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0083 <IN>
bmAttributes = 0x0003 <INTERRUPT>
wMaxPacketSize = 0x0008
bInterval = 0x000a
bRefresh = 0x0000
bSynchAddress = 0x0000
Interface 1
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x0000
bNumEndpoints = 0x0000
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Interface 1 Alt 1
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x0001
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x02, 0x10, 0x01,
0x08 | 0x44, 0xac, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x00b4
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 2
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x0002
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x03, 0x18, 0x01,
0x08 | 0x44, 0xac, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x010e
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 3
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x0003
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x04, 0x02, 0x10, 0x01,
0x08 | 0x44, 0xac, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x0168
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 4
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x0004
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x04, 0x03, 0x18, 0x01,
0x08 | 0x44, 0xac, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x021c
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 5
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x0005
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x06, 0x02, 0x10, 0x01,
0x08 | 0x44, 0xac, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x021c
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 6
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x0006
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x06, 0x03, 0x18, 0x01,
0x08 | 0x44, 0xac, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x032a
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 7
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x0007
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x02, 0x10, 0x01,
0x08 | 0x80, 0xbb, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x00c0
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 8
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x0008
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x03, 0x18, 0x01,
0x08 | 0x80, 0xbb, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x0120
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 9
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x0009
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x04, 0x02, 0x10, 0x01,
0x08 | 0x80, 0xbb, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x0180
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 10
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x000a
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x04, 0x03, 0x18, 0x01,
0x08 | 0x80, 0xbb, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x0240
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 11
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x000b
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x06, 0x02, 0x10, 0x01,
0x08 | 0x80, 0xbb, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x0240
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 12
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x000c
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x06, 0x03, 0x18, 0x01,
0x08 | 0x80, 0xbb, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x0360
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 13
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x000d
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x02, 0x10, 0x01,
0x08 | 0x00, 0x77, 0x01
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x0180
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 1 Alt 14
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0001
bAlternateSetting = 0x000e
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x01, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x03, 0x18, 0x01,
0x08 | 0x00, 0x77, 0x01
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0001 <OUT>
bmAttributes = 0x0009 <ADAPT-ISOCHRONOUS>
wMaxPacketSize = 0x0240
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 2
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0000
bNumEndpoints = 0x0000
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Interface 2 Alt 1
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0001
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x06, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x02, 0x10, 0x01,
0x08 | 0x44, 0xac, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x000d <SYNC-ISOCHRONOUS>
wMaxPacketSize = 0x00dc
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 2 Alt 2
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0002
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x06, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x03, 0x18, 0x01,
0x08 | 0x44, 0xac, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x000d <SYNC-ISOCHRONOUS>
wMaxPacketSize = 0x014a
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 2 Alt 3
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0003
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x06, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x02, 0x10, 0x01,
0x08 | 0x80, 0xbb, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x000d <SYNC-ISOCHRONOUS>
wMaxPacketSize = 0x00f0
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 2 Alt 4
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0004
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x06, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x03, 0x18, 0x01,
0x08 | 0x80, 0xbb, 0x00
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x000d <SYNC-ISOCHRONOUS>
wMaxPacketSize = 0x0168
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 2 Alt 5
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0005
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x06, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x02, 0x10, 0x01,
0x08 | 0x00, 0x77, 0x01
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x000d <SYNC-ISOCHRONOUS>
wMaxPacketSize = 0x01e0
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
Interface 2 Alt 6
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0002
bAlternateSetting = 0x0006
bNumEndpoints = 0x0001
bInterfaceClass = 0x0001 <Audio device>
bInterfaceSubClass = 0x0002
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x24
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x24, 0x01, 0x06, 0x01, 0x01, 0x00
Additional Descriptor
bLength = 0x0b
bDescriptorType = 0x24
bDescriptorSubType = 0x02
RAW dump:
0x00 | 0x0b, 0x24, 0x02, 0x01, 0x02, 0x03, 0x18, 0x01,
0x08 | 0x00, 0x77, 0x01
Endpoint 0
bLength = 0x0009
bDescriptorType = 0x0005
bEndpointAddress = 0x0082 <IN>
bmAttributes = 0x000d <SYNC-ISOCHRONOUS>
wMaxPacketSize = 0x02d0
bInterval = 0x0001
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x07
bDescriptorType = 0x25
bDescriptorSubType = 0x01
RAW dump:
0x00 | 0x07, 0x25, 0x01, 0x01, 0x00, 0x00, 0x00
pgp3fE1fUQ7aA.pgp
Description: Digitale PGP-Signatur
