It took a while (10s?) before.

Now I get this immediately:

evices: 1/1
  Subdevice #0: subdevice #0
pi@cam-09:~ $ arecord -f cd -d 10 --device="hw:2,0" /tmp/test-mic.wav
Recording WAVE '/tmp/test-mic.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
arecord: set_params:1407: Unable to install hw params:
ACCESS:  RW_INTERLEAVED
FORMAT:  S16_LE
SUBFORMAT:  STD
SAMPLE_BITS: 16
FRAME_BITS: 32
CHANNELS: 2
RATE: 44100
PERIOD_TIME: (125011 125012)
PERIOD_SIZE: 5513
PERIOD_BYTES: 22052
PERIODS: 4
BUFFER_TIME: (500045 500046)
BUFFER_SIZE: 22052
BUFFER_BYTES: 88208
TICK_TIME: 0

This most recent one (after a reboot that changed the card $) laste the full 30 seconds and showed the mixer EQ at the bottom. That was pegged at 99% the whole time.

I need to move the file to see if I can hear anything but it looks like it died the same way.

pi@cam-09:~ $ arecord --device="hw:2,0" -c2 -r 48000 -f S32_LE -t wav -V stereo -d 30 -v file_stereo.wav
Recording WAVE 'file_stereo.wav' : Signed 32 bit Little Endian, Rate 48000 Hz, Stereo
Hardware PCM card 2 'audioinjector-ultra' device 0 subdevice 0
Its setup is:
  stream       : CAPTURE
  access       : RW_INTERLEAVED
  format       : S32_LE
  subformat    : STD
  channels     : 2
  rate         : 48000
  exact rate   : 48000 (48000/1)
  msbits       : 32
  buffer_size  : 24000
  period_size  : 6000
  period_time  : 125000
  tstamp_mode  : NONE
  tstamp_type  : MONOTONIC
  period_step  : 1
  avail_min    : 6000
  period_event : 0
  start_threshold  : 1
  stop_threshold   : 24000
  silence_threshold: 0
  silence_size : 0
  boundary     : 1572864000
  appl_ptr     : 0
  hw_ptr       : 0
+################################# 99%|99%##################################+ arecord: pcm_read:2152: read error: Input/output error

On Tue, Jul 12, 2022 at 1:56 AM Matt Flax <matt@audioinjector.net> wrote:

It looks like it should work.

The fact that ALSA/Linux finds the card and sets it up means that you
have got I2C working.

Perhaps there is a clocking I2S bus issue ? How long does it take before
it reports the error ?

Matt

On 12/7/22 15:34, mark via People wrote:
> Excited to add audio to my Pi, and just finished assembling the boards.
> I see the device listed with arecord -l.
> But, when I go to capture there is a read error.  Any suggestions on
> how to troubleshoot appreciated.
>
> pi@cam-09:~ $ sudo arecord -l
> **** List of CAPTURE Hardware Devices ****
> card 0: audioinjectorul [audioinjector-ultra], device 0:
> bcm2835-i2s-cs4265-dai1 cs4265-dai1-0 [bcm2835-i2s-cs4265-dai1
> cs4265-dai1-0]
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> pi@cam-09:~ $ arecord --device="hw:0,0" -c2 -r 48000 -f S32_LE -t wav
> -V stereo -d 30 -v file_stereo.wav
> Recording WAVE 'file_stereo.wav' : Signed 32 bit Little Endian, Rate
> 48000 Hz, Stereo
> Hardware PCM card 0 'audioinjector-ultra' device 0 subdevice 0
> Its setup is:
>   stream       : CAPTURE
>   access       : RW_INTERLEAVED
>   format       : S32_LE
>   subformat    : STD
>   channels     : 2
>   rate         : 48000
>   exact rate   : 48000 (48000/1)
>   msbits       : 32
>   buffer_size  : 24000
>   period_size  : 6000
>   period_time  : 125000
>   tstamp_mode  : NONE
>   tstamp_type  : MONOTONIC
>   period_step  : 1
>   avail_min    : 6000
>   period_event : 0
>   start_threshold  : 1
>   stop_threshold   : 24000
>   silence_threshold: 0
>   silence_size : 0
>   boundary     : 1572864000
>   appl_ptr     : 0
>   hw_ptr       : 0
> arecord: pcm_read:2152: read error: Input/output error
> pi@cam-09:~ $
>
>
>
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