[AudioI] Nothing works on RPi3b+

[Matt]

Hi Ian,

On 18/10/20 10:00 am, Ian McKellar via People wrote:
> I bought an AudioInjector Zero and I can't get it to work on the 
> hardware I have.
>
> I believe I have it configured correctly. I'm running Linux 5.4.70-v7+ 
> and have
>
>     dtparam=i2c_arm=on
>     dtparam=i2s=on
>     dtoverlay=audioinjector-wm8731-audio
>
> in /boot/config.txt
>
> During boot dmesg gets:
> [    8.939739] audioinjector-stereo soc:sound: ASoC: failed to init 
> link AudioInjector audio: -517
> [    8.939762] audioinjector-stereo soc:sound: snd_soc_register_card 
> failed (-517)
> [    9.295473] audioinjector-stereo soc:sound: ASoC: failed to init 
> link AudioInjector audio: -517
> [    9.295496] audioinjector-stereo soc:sound: snd_soc_register_card 
> failed (-517)
> [    9.330667] audioinjector-stereo soc:sound: ASoC: failed to init 
> link AudioInjector audio: -517
> [    9.330692] audioinjector-stereo soc:sound: snd_soc_register_card 
> failed (-517)
> [   10.051168] wm8731 1-001a: Assuming static MCLK
> [   10.051223] wm8731 1-001a: 1-001a supply AVDD not found, using 
> dummy regulator
> [   10.051357] wm8731 1-001a: 1-001a supply HPVDD not found, using 
> dummy regulator
> [   10.051452] wm8731 1-001a: 1-001a supply DCVDD not found, using 
> dummy regulator
> [   10.051574] wm8731 1-001a: 1-001a supply DBVDD not found, using 
> dummy regulator
> [   10.067882] audioinjector-stereo soc:sound: wm8731-hifi <-> 
> 3f203000.i2s mapping ok
>

Good news, this last line indicates that the sound card is setup in 
software and ready to go.


> But when I try to play something, eg: aplay 
> /usr/share/sounds/alsa/Noise.wav
> it hangs and doesn't appear to be actually playing anything. Also 
> dmesg gets:
> [  224.002383] bcm2835-i2s 3f203000.i2s: I2S SYNC error!
>

This dmesg error isn't related to the soundcard, it is related to the 
Pi's I2S driver.


> Any ideas? Might I have done a terrible job soldering the pin socket?
>
>

Have you toggled the setting in alsamixer which enables the output mixer 
hifi ? You can read about it on our old forum :

http://forum.audioinjector.net/viewtopic.php@t=5.html#p7

thanks

Matt


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