https://bugs.freedesktop.org/show_bug.cgi?id=88265
--- Comment #8 from Raymond <[email protected]> --- your usb audio only support 6 channel and has pcm playback volume control with very small dB range from -3.12 dB to 0dB the work around is ignore dB range by specify ignore_dB=1 http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules/#index53h3 USB Mixer: usb_id=0x05a71020, ctrlif=0, ctlerr=0 Card: Bose Corporation Bose USB Audio at usb-0000:00:14.0-1, full speed Unit: 3 Control: name="PCM Playback Volume", index=0 Info: id=3, control=2, cmask=0x0, channels=1, type="S16" Volume: min=-801, max=-1, dBmin=-312, dBmax=0 Unit: 3 Control: name="PCM Playback Switch", index=0 Info: id=3, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN" Volume: min=0, max=1, dBmin=0, dBmax=0 post output of your usb audio device lsusb -vvvv -- You are receiving this mail because: You are the QA Contact for the bug. You are the assignee for the bug.
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