[AudioI] read error

Matt Flax matt at audioinjector.net
Wed Jul 13 00:02:59 UTC 2022 

OK, I2C is working, the CPU can communicate with he audio codec IC. That 
means that the CPU can setup the registers.

When it takes many seconds for the system to fail (on aplay or arecord) 
with something like  :

arecord: pcm_read:2152: read error: Input/output error

It means that the I2S bus has failed to clock. In this case you will 
want to interrogate the 40 pin header on the card, make sure it is 
cleanly soldered. Also if you have a cro handy, connect to the I2S bus 
lines and look for clocking and data. If you have any issues with this, 
look for dropped solder, dry solder joints or anything which would 
disrupt the signals.

When you see errors like this :

arecord: set_params:1407: Unable to install hw params:

It means that ALSA couldn't run the *_hwparam_* functions in the driver. 
In this case the card can't do 44100 Hz sample rates, try to use plughw: 
instread of hw:


Matt


On 13/7/22 05:01, mark wrote:
> I noticed some weirdness and decided to start with a fresh Bullseye 
> image.
> After a full-upgrade I made the changes mentioned on the git page. The 
> devices show up when listed, but I cannot get the speakers or 
> microphones (on-board) to work. It seems like the device is seen but 
> not really set up.
>
> Thanks in advance for any help you can provide.
>
> aplay and arecord see the device:
>
> pi at soundpi:~ $ 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 at soundpi:~ $ aplay -l
> **** List of PLAYBACK 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
> card 1: vc4hdmi0 [vc4-hdmi-0], device 0: MAI PCM i2s-hifi-0 [MAI PCM 
> i2s-hifi-0]
>
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> card 2: vc4hdmi1 [vc4-hdmi-1], device 0: MAI PCM i2s-hifi-0 [MAI PCM 
> i2s-hifi-0]
>
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
>
>
> But even though I can see them, I don't seem to know how to use them.  
> I get an error trying to play on card 0 that gives an interesting 
> error that may point to a config or software issue:
>
> pi at soundpi:~/Desktop/recordings $ aplay -D plughw:0,0 CantinaBand3.wav
> Playing WAVE 'CantinaBand3.wav' : Signed 16 bit Little Endian, Rate 
> 22050 Hz, Mono
> aplay: set_params:1407: Unable to install hw params:
>
> ACCESS:  RW_INTERLEAVED
> FORMAT:  S16_LE
> SUBFORMAT:  STD
> SAMPLE_BITS: 16
> FRAME_BITS: 16
> CHANNELS: 1
> RATE: 22050
> PERIOD_TIME: (125011 125012)
> PERIOD_SIZE: (2756 2757)
> PERIOD_BYTES: (5512 5514)
> PERIODS: (3 5)
> BUFFER_TIME: (500045 500046)
> BUFFER_SIZE: 11026
> BUFFER_BYTES: 22052
> TICK_TIME: 0
> pi at soundpi:~/Desktop/recordings $
>
>
>
>
>
> On Tue, Jul 12, 2022 at 7:08 AM mark <mvlambiase at gmail.com> wrote:
>
>     It took a while (10s?) before.
>     Now I get this immediately:
>
>     evices: 1/1
>       Subdevice #0: subdevice #0
>     pi at 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 at 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 at 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 at 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 at 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 at cam-09:~ $
>         >
>         >
>         >
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>
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