[pulseaudio-tickets] [Bug 42956] not able to set 44k sample rate with module-alsa-sink even the hardware supports it

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=42956

--- Comment #4 from sam.right at gmail.com 2011-11-16 05:34:44 PST ---
The desktop was using an earlier version of kernel 2.6.32. Today I tried aplay
that comes with alsa-utils and it seems to play at 44.1k sample rate just fine
(I had to create the .asoundrc file in the home folder otherwise aplay just
force the sample rate to 48k). The usb sound card is the only sound card
attached to  it (card0)


~/.asoundrc file

pcm.dmix_44 {
        type dmix
        ipc_key 321456  # any unique value
        ipc_key_add_uid true
        slave {
                pcm "hw:0"
                format S16_LE
                rate 44100
        }
}

./aplay -v -Dplug:dmix_44 44100.wav


Playing WAVE '44100.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
Plug PCM: Direct Stream Mixing PCM
Its setup is:
  stream       : PLAYBACK
  access       : RW_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 44100
  exact rate   : 44100 (44100/1)
  msbits       : 16
  buffer_size  : 16539
  period_size  : 5513
  period_time  : 125011
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 5513
  period_event : 0
  start_threshold  : 16539
  stop_threshold   : 16539
  silence_threshold: 0
  silence_size : 0
  boundary     : 1083899904
Hardware PCM card 0 'USB Audio DAC' device 0 subdevice 0
Its setup is:
  stream       : PLAYBACK
  access       : MMAP_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 44100
  exact rate   : 44100 (44100/1)
  msbits       : 16
  buffer_size  : 16539
  period_size  : 5513
  period_time  : 125011
  tstamp_mode  : ENABLE
  period_step  : 1
  avail_min    : 5513
  period_event : 0
  start_threshold  : 1
  stop_threshold   : 1083899904
  silence_threshold: 0
  silence_size : 1083899904
  boundary     : 1083899904
  appl_ptr     : 0
  hw_ptr       : 0



/proc/asound/card0/pcm0p/sub0/hw_params
access: MMAP_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 44100 (44100/1)
period_size: 5513
buffer_size: 16539

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