I had to put something like
pcm.!default {
type hw
card 0
}
in my /etc/asound.conf in order to get a default rate of 44100.
Laurentiu
On Thu, Oct 23, 2014, at 11:25, mailing lists wrote:
> Hi all,
>
> the usb card have hardware support for 32000, 44100 and 48000
> samplerates:
>
> root at rpi:~# cat /proc/asound/card1/stream0
> Burr-Brown from TI USB Audio CODEC at usb-bcm2708_usb-1.2, full speed :
> USB Audio
>
> Playback:
> Status: Stop
> Interface 1
> Altset 1
> Format: S16_LE
> Channels: 2
> Endpoint: 2 OUT (ADAPTIVE)
> Rates: 32000, 44100, 48000
> [...]
>
> (full trace below)
> root at rpi:~# lsusb -v -s 1:14
> Bus 002 Device 004: ID 08bb:2902 Texas Instruments PCM2902 Audio Codec
> [...]
> AudioStreaming Interface Descriptor:
> bLength 17
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 3 Discrete
> tSamFreq[ 0] 32000
> tSamFreq[ 1] 44100
> tSamFreq[ 2] 48000
>
>
> and other aplications like the music player daemon, with alsa output,
> have not problem using 44100 samplerate, pulseaudio output is a cpu hog
> because the innecesary sample rate conversion, music is 44100 so
> pulseaudio 48000 detection triggers resampling.
>
> my doubt is that makes pulseadio detect 48000 in the raspberry and 44100
> in the laptop when I am using the same usb sound card in both cases ??
>
> any clues?
>
>
> Full trace of lsusb...
> # lsusb -v -s 1:14
> Bus 002 Device 004: ID 08bb:2902 Texas Instruments PCM2902 Audio Codec
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 1.10
> bDeviceClass 0 (Defined at Interface level)
> bDeviceSubClass 0
> bDeviceProtocol 0
> bMaxPacketSize0 8
> idVendor 0x08bb Texas Instruments
> idProduct 0x2902 PCM2902 Audio Codec
> bcdDevice 1.00
> iManufacturer 1 Burr-Brown from TI
> iProduct 2 USB Audio CODEC
> iSerial 0
> bNumConfigurations 1
> Configuration Descriptor:
> bLength 9
> bDescriptorType 2
> wTotalLength 1191
> bNumInterfaces 4
> bConfigurationValue 1
> iConfiguration 0
> bmAttributes 0x80
> (Bus Powered)
> MaxPower 100mA
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 0
> bNumEndpoints 0
> bInterfaceClass 1 Audio
> bInterfaceSubClass 1 Control Device
> bInterfaceProtocol 0
> iInterface 0
> AudioControl Interface Descriptor:
> bLength 10
> bDescriptorType 36
> bDescriptorSubtype 1 (HEADER)
> bcdADC 1.00
> wTotalLength 62
> bInCollection 2
> baInterfaceNr( 0) 1
> baInterfaceNr( 1) 2
> AudioControl Interface Descriptor:
> bLength 12
> bDescriptorType 36
> bDescriptorSubtype 2 (INPUT_TERMINAL)
> bTerminalID 1
> wTerminalType 0x0101 USB Streaming
> bAssocTerminal 0
> bNrChannels 2
> wChannelConfig 0x0003
> Left Front (L)
> Right Front (R)
> iChannelNames 0
> iTerminal 0
> AudioControl Interface Descriptor:
> bLength 9
> bDescriptorType 36
> bDescriptorSubtype 3 (OUTPUT_TERMINAL)
> bTerminalID 2
> wTerminalType 0x0301 Speaker
> bAssocTerminal 0
> bSourceID 3
> iTerminal 0
> AudioControl Interface Descriptor:
> bLength 10
> bDescriptorType 36
> bDescriptorSubtype 6 (FEATURE_UNIT)
> bUnitID 3
> bSourceID 1
> bControlSize 1
> bmaControls( 0) 0x01
> Mute Control
> bmaControls( 1) 0x02
> Volume Control
> bmaControls( 2) 0x02
> Volume Control
> iFeature 0
> AudioControl Interface Descriptor:
> bLength 12
> bDescriptorType 36
> bDescriptorSubtype 2 (INPUT_TERMINAL)
> bTerminalID 4
> wTerminalType 0x0201 Microphone
> bAssocTerminal 0
> bNrChannels 2
> wChannelConfig 0x0003
> Left Front (L)
> Right Front (R)
> iChannelNames 0
> iTerminal 0
> AudioControl Interface Descriptor:
> bLength 9
> bDescriptorType 36
> bDescriptorSubtype 3 (OUTPUT_TERMINAL)
> bTerminalID 5
> wTerminalType 0x0101 USB Streaming
> bAssocTerminal 0
> bSourceID 4
> iTerminal 0
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 1
> bAlternateSetting 0
> bNumEndpoints 0
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 1
> bAlternateSetting 1
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 1
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 17
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 3 Discrete
> tSamFreq[ 0] 32000
> tSamFreq[ 1] 44100
> tSamFreq[ 2] 48000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x02 EP 2 OUT
> bmAttributes 9
> Transfer Type Isochronous
> Synch Type Adaptive
> Usage Type Data
> wMaxPacketSize 0x00c0 1x 192 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 512 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 1
> bAlternateSetting 2
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 1
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 17
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 3 Discrete
> tSamFreq[ 0] 32000
> tSamFreq[ 1] 44100
> tSamFreq[ 2] 48000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x02 EP 2 OUT
> bmAttributes 9
> Transfer Type Isochronous
> Synch Type Adaptive
> Usage Type Data
> wMaxPacketSize 0x0060 1x 96 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 512 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 1
> bAlternateSetting 3
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 1
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 17
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 1
> bBitResolution 8
> bSamFreqType 3 Discrete
> tSamFreq[ 0] 32000
> tSamFreq[ 1] 44100
> tSamFreq[ 2] 48000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x02 EP 2 OUT
> bmAttributes 9
> Transfer Type Isochronous
> Synch Type Adaptive
> Usage Type Data
> wMaxPacketSize 0x0060 1x 96 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 512 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 1
> bAlternateSetting 4
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 1
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 17
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
> bSubframeSize 1
> bBitResolution 8
> bSamFreqType 3 Discrete
> tSamFreq[ 0] 32000
> tSamFreq[ 1] 44100
> tSamFreq[ 2] 48000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x02 EP 2 OUT
> bmAttributes 9
> Transfer Type Isochronous
> Synch Type Adaptive
> Usage Type Data
> wMaxPacketSize 0x0030 1x 48 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 512 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 1
> bAlternateSetting 5
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 1
> bDelay 0 frames
> wFormatTag 2 PCM8
> AudioStreaming Interface Descriptor:
> bLength 17
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 1
> bBitResolution 8
> bSamFreqType 3 Discrete
> tSamFreq[ 0] 32000
> tSamFreq[ 1] 44100
> tSamFreq[ 2] 48000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x02 EP 2 OUT
> bmAttributes 9
> Transfer Type Isochronous
> Synch Type Adaptive
> Usage Type Data
> wMaxPacketSize 0x0060 1x 96 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 512 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 1
> bAlternateSetting 6
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 1
> bDelay 0 frames
> wFormatTag 2 PCM8
> AudioStreaming Interface Descriptor:
> bLength 17
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
> bSubframeSize 1
> bBitResolution 8
> bSamFreqType 3 Discrete
> tSamFreq[ 0] 32000
> tSamFreq[ 1] 44100
> tSamFreq[ 2] 48000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x02 EP 2 OUT
> bmAttributes 9
> Transfer Type Isochronous
> Synch Type Adaptive
> Usage Type Data
> wMaxPacketSize 0x0030 1x 48 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 512 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 0
> bNumEndpoints 0
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 1
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 48000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x00c4 1x 196 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 2
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 48000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x0062 1x 98 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 3
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 44100
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x00b4 1x 180 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 4
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 44100
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x005a 1x 90 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 5
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 32000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x0084 1x 132 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 6
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 32000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x0042 1x 66 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 7
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 22050
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x005c 1x 92 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 8
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 22050
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x002e 1x 46 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 9
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 16000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x0044 1x 68 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 10
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 16000
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x0022 1x 34 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
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> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
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> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
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> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
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> bSamFreqType 1 Discrete
> tSamFreq[ 0] 16000
> Endpoint Descriptor:
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> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x0022 1x 34 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
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> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
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> Interface Descriptor:
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> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 12
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
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> AudioStreaming Interface Descriptor:
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> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
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> wFormatTag 1 PCM
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> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
> bSubframeSize 1
> bBitResolution 8
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 16000
> Endpoint Descriptor:
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> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x0011 1x 17 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
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> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 13
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
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> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
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> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 1
> bBitResolution 8
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 8000
> Endpoint Descriptor:
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> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
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> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
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> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
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> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 14
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
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> iInterface 0
> AudioStreaming Interface Descriptor:
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> bDescriptorSubtype 1 (AS_GENERAL)
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> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
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> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
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> bBitResolution 8
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 8000
> Endpoint Descriptor:
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> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
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> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
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> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
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> iInterface 0
> AudioStreaming Interface Descriptor:
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> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
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> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
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> Endpoint Descriptor:
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> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 13
> Transfer Type Isochronous
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> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
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> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
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> bInterfaceNumber 2
> bAlternateSetting 16
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
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> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
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> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
> bSubframeSize 2
> bBitResolution 16
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 11025
> Endpoint Descriptor:
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> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 13
> Transfer Type Isochronous
> Synch Type Synchronous
> Usage Type Data
> wMaxPacketSize 0x0018 1x 24 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
> bLength 7
> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
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> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 17
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 2
> bSubframeSize 1
> bBitResolution 8
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 11025
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 13
> Transfer Type Isochronous
> Synch Type Synchronous
> Usage Type Data
> wMaxPacketSize 0x0018 1x 24 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
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> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 18
> bNumEndpoints 1
> bInterfaceClass 1 Audio
> bInterfaceSubClass 2 Streaming
> bInterfaceProtocol 0
> iInterface 0
> AudioStreaming Interface Descriptor:
> bLength 7
> bDescriptorType 36
> bDescriptorSubtype 1 (AS_GENERAL)
> bTerminalLink 5
> bDelay 0 frames
> wFormatTag 1 PCM
> AudioStreaming Interface Descriptor:
> bLength 11
> bDescriptorType 36
> bDescriptorSubtype 2 (FORMAT_TYPE)
> bFormatType 1 (FORMAT_TYPE_I)
> bNrChannels 1
> bSubframeSize 1
> bBitResolution 8
> bSamFreqType 1 Discrete
> tSamFreq[ 0] 11025
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x84 EP 4 IN
> bmAttributes 13
> Transfer Type Isochronous
> Synch Type Synchronous
> Usage Type Data
> wMaxPacketSize 0x000c 1x 12 bytes
> bInterval 1
> bRefresh 0
> bSynchAddress 0
> AudioControl Endpoint Descriptor:
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> bDescriptorType 37
> bDescriptorSubtype 1 (EP_GENERAL)
> bmAttributes 0x00
> bLockDelayUnits 2 Decoded PCM samples
> wLockDelay 0 Decoded PCM samples
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 3
> bAlternateSetting 0
> bNumEndpoints 1
> bInterfaceClass 3 Human Interface Device
> bInterfaceSubClass 0 No Subclass
> bInterfaceProtocol 0 None
> iInterface 0
> HID Device Descriptor:
> bLength 9
> bDescriptorType 33
> bcdHID 1.00
> bCountryCode 0 Not supported
> bNumDescriptors 1
> bDescriptorType 34 Report
> wDescriptorLength 31
> Report Descriptors:
> ** UNAVAILABLE **
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x85 EP 5 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0001 1x 1 bytes
> bInterval 10
> Device Status: 0x0000
> (Bus Powered)
>
>
> --------------------------------------------
> On Wed, 10/22/14, mailing lists <listas.correo at yahoo.es> wrote:
>
> Subject: pulseaudio (V5) incorrect rate detection on usb sound card with
> raspberry
> To: pulseaudio-discuss at lists.freedesktop.org
> Date: Wednesday, October 22, 2014, 1:23 PM
>
> Hello,
>
> I'm not entirely sure about if pulseaudio is the culprit
> here, but I'm out of ideas and need some advise.
>
> Connecting _the_same_usb _sound_card_? to my laptop or
> to the raspberry makes pulseaudio detect different rate
> capabilities. Unfortunatelly the raspberry detects the wrong
> rate (48000) so it forces samplerate conversion for 44100
> streams. It doesn't matter the parameter that I change
> (default-sample-rate, rate=), pulseaudio always detect the
> wrong rate.
>
> Other applications on raspberry like mpd (alsa output) have
> not problem using 44100.
>
> Linux macbook 3.17.1-gentoo-r1-macbook4,1 #1 SMP PREEMPT Fri
> Oct 17 17:29:07 CEST 2014 x86_64 Intel(R) Core(TM)2 Duo CPU
> T8300 @ 2.40GHz GenuineIntel GNU/Linux
> [...]
> I: [pulseaudio] sink.c: Created sink 1
> "alsa_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.analog-stereo"
> with sample spec s16le 2ch 44100Hz and channel map
> front-left,front-right
>
>
> Linux rpi 3.12.29+ #714 PREEMPT Wed Oct 1 23:11:38 BST 2014
> armv6l GNU/Linux
> [...]
> I: [pulseaudio] sink.c: Created sink 0
> "alsa_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.analog-stereo"
> with sample spec s16le 2ch 48000Hz and channel map
> front-left,front-right
>
>
> any clue where can be the problem?
>
>
>
> _______________________________________________
> pulseaudio-discuss mailing list
> pulseaudio-discuss at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
