>Your usb audio seem support mono, stereo, 8 bits and 16 bits > >and some endpoint support 8000,11025,16000,22025Hz > >Seem like driver bug if you can only use 32000 44100 and 48000Hz The 8000, 11025, 16000 and 22050 values are capture samplerates (see below /proc/asound/card1/stream0 output), for playback the card support 32000, 44100, 48000. my laptop is running kernel 3.17.1 and the raspberry kernel 3.12.29, which are less than a year apart and both reports the same capabilities, so why PA 5 detects different samplerates? I even run PA as root to discard file permissions problems but the result is the same. As I said I'm out of ideas, but it seems a problem with PA, is there anything that I can do to find the cause? $ cat /proc/asound/card1/stream0 Burr-Brown from TI USB Audio CODEC at usb-0000:00:1d.0-2, full speed : USB Audio Playback:  Status: Stop  Interface 1   Altset 1   Format: S16_LE   Channels: 2   Endpoint: 2 OUT (ADAPTIVE)   Rates: 32000, 44100, 48000  Interface 1   Altset 2   Format: S16_LE   Channels: 1   Endpoint: 2 OUT (ADAPTIVE)   Rates: 32000, 44100, 48000  Interface 1   Altset 3   Format: S8   Channels: 2   Endpoint: 2 OUT (ADAPTIVE)   Rates: 32000, 44100, 48000  Interface 1   Altset 4   Format: S8   Channels: 1   Endpoint: 2 OUT (ADAPTIVE)   Rates: 32000, 44100, 48000  Interface 1   Altset 5   Format: U8   Channels: 2   Endpoint: 2 OUT (ADAPTIVE)   Rates: 32000, 44100, 48000  Interface 1   Altset 6   Format: U8   Channels: 1   Endpoint: 2 OUT (ADAPTIVE)   Rates: 32000, 44100, 48000 Capture:  Status: Stop  Interface 2   Altset 1   Format: S16_LE   Channels: 2   Endpoint: 4 IN (ASYNC)   Rates: 48000  Interface 2   Altset 2   Format: S16_LE   Channels: 1   Endpoint: 4 IN (ASYNC)   Rates: 48000  Interface 2   Altset 3   Format: S16_LE   Channels: 2   Endpoint: 4 IN (ASYNC)   Rates: 44100  Interface 2   Altset 4   Format: S16_LE   Channels: 1   Endpoint: 4 IN (ASYNC)   Rates: 44100  Interface 2   Altset 5   Format: S16_LE   Channels: 2   Endpoint: 4 IN (ASYNC)   Rates: 32000  Interface 2   Altset 6   Format: S16_LE   Channels: 1   Endpoint: 4 IN (ASYNC)   Rates: 32000  Interface 2   Altset 7   Format: S16_LE   Channels: 2   Endpoint: 4 IN (ASYNC)   Rates: 22050  Interface 2   Altset 8   Format: S16_LE   Channels: 1   Endpoint: 4 IN (ASYNC)   Rates: 22050  Interface 2   Altset 9   Format: S16_LE   Channels: 2   Endpoint: 4 IN (ASYNC)   Rates: 16000  Interface 2   Altset 10   Format: S16_LE   Channels: 1   Endpoint: 4 IN (ASYNC)   Rates: 16000  Interface 2   Altset 11   Format: S8   Channels: 2   Endpoint: 4 IN (ASYNC)   Rates: 16000  Interface 2   Altset 12   Format: S8   Channels: 1   Endpoint: 4 IN (ASYNC)   Rates: 16000  Interface 2   Altset 13   Format: S8   Channels: 2   Endpoint: 4 IN (ASYNC)   Rates: 8000  Interface 2   Altset 14   Format: S8   Channels: 1   Endpoint: 4 IN (ASYNC)   Rates: 8000  Interface 2   Altset 15   Format: S16_LE   Channels: 2   Endpoint: 4 IN (SYNC)   Rates: 11025  Interface 2   Altset 16   Format: S16_LE   Channels: 1   Endpoint: 4 IN (SYNC)   Rates: 11025  Interface 2   Altset 17   Format: S8   Channels: 2   Endpoint: 4 IN (SYNC)   Rates: 11025  Interface 2   Altset 18   Format: S8   Channels: 1   Endpoint: 4 IN (SYNC)   Rates: 11025
