do you mean the log was obtained when you switch to 7.1 since there is
no stereo ?
the card only support 48000Hz
6 or 8 channels playback
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
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 8
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 48000
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 6
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 48000
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 3
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bNrChannels 8
wChannelConfig 0x063f
Left Front (L)
Right Front (R)
Center Front (C)
Low Freqency Enhancement (LFE)
Left Surround (LS)
Right Surround (RS)
Side Left (SL)
Side Right (SR)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 25
bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
bUnitID 4
bSourceID 3
bControlSize 2
bmaControls( 0) 0x01
bmaControls( 0) 0x00
Mute Control
bmaControls( 1) 0x00
bmaControls( 1) 0x00
bmaControls( 2) 0x00
bmaControls( 2) 0x00
bmaControls( 3) 0x00
bmaControls( 3) 0x00
bmaControls( 4) 0x00
bmaControls( 4) 0x00
bmaControls( 5) 0x00
bmaControls( 5) 0x00
bmaControls( 6) 0x00
bmaControls( 6) 0x00
bmaControls( 7) 0x00
bmaControls( 7) 0x00
bmaControls( 8) 0x00
bmaControls( 8) 0x00
iFeature 0
seem you have selected 5.1 profile in sound preference
seem strange that O05 has no input from left and right ,
do Center or LFE need mix of left and right channels when upmixing from
stereo ?
( 24.134| 0.000) I: [alsa-sink] alsa-sink.c: Starting playback.
( 24.134| 0.000) D: [pulseaudio] module-suspend-on-idle.c: Sink
alsa_output.usb-Razer_Razer_Megalodon-00-Megalodon.analog-surround-51 becomes
busy.
( 24.134| 0.000) D: [pulseaudio] resampler.c: Channel matrix:
( 24.134| 0.000) D: [pulseaudio] resampler.c: I00 I01
( 24.134| 0.000) D: [pulseaudio] resampler.c: +------------
( 24.134| 0.000) D: [pulseaudio] resampler.c: O00 | 1.000 0.000
( 24.134| 0.000) D: [pulseaudio] resampler.c: O01 | 0.000 1.000
( 24.134| 0.000) D: [pulseaudio] resampler.c: O02 | 1.000 0.000
( 24.134| 0.000) D: [pulseaudio] resampler.c: O03 | 0.000 1.000
( 24.134| 0.000) D: [pulseaudio] resampler.c: O04 | 0.500 0.500
( 24.134| 0.000) D: [pulseaudio] resampler.c: O05 | 0.000 0.000
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https://bugs.launchpad.net/bugs/1184025
Title:
[USB-Audio - Razer Megalodon, playback] Underruns, dropouts or
crackling sound
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