[alsa-devel] [Linux-kernel] [PATCH v5 2/7] ASoC: tegra: Allow 24bit and 32bit samples

[Jon Hunter]

On 28/01/2020 13:19, Jon Hunter wrote:

...

> I ran a test on Tegra124 Jetson-TK1 and 24-bit playback seems to work as
> Ben has indicated. So I don't think it is broken.

Actually, it does not work on TK1. Pulseaudio was converting from
S24_3LE to S16_LE. If I use plughw to do the conversion it sounds
distorted indeed.

Ben what audio codec are you testing with?

Jon

Playing WAVE 'tmp.wav' : Signed 24 bit Little Endian in 3bytes, Rate
44100 Hz, Stereo
Plug PCM: Linear conversion PCM (S24_LE)
Its setup is:
  stream       : PLAYBACK
  access       : RW_INTERLEAVED
  format       : S24_3LE
  subformat    : STD
  channels     : 2
  rate         : 44100
  exact rate   : 44100 (44100/1)
  msbits       : 24
  buffer_size  : 4096
  period_size  : 512
  period_time  : 11609
  tstamp_mode  : NONE
  tstamp_type  : MONOTONIC
  period_step  : 1
  avail_min    : 512
  period_event : 0
  start_threshold  : 4096
  stop_threshold   : 4096
  silence_threshold: 0
  silence_size : 0
  boundary     : 1073741824
Slave: Hardware PCM card 0 'NVIDIA Tegra Jetson TK1' device 0 subdevice 0
Its setup is:
  stream       : PLAYBACK
  access       : MMAP_INTERLEAVED
  format       : S24_LE
  subformat    : STD
  channels     : 2
  rate         : 44100
  exact rate   : 44100 (44100/1)
  msbits       : 32
  buffer_size  : 4096
  period_size  : 512
  period_time  : 11609
  tstamp_mode  : NONE
  tstamp_type  : MONOTONIC
  period_step  : 1
  avail_min    : 512
  period_event : 0
  start_threshold  : 4096
  stop_threshold   : 4096
  silence_threshold: 0
  silence_size : 0
  boundary     : 1073741824
  appl_ptr     : 0
  hw_ptr       : 0


-- 
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