i2S Audio issues retropie using adafruit class D-DAc and amplifier

arvis1

Hello! I am running into issues when setting up i2s audio using the following guide:
https://cdn-learn.adafruit.com/downloads/pdf/adafruit-max98357-i2s-class-d-mono-amp.pdf
I can get the sound to play when using speaker-test c2, but only on "Right" and not at all in retropie/emulationStation.

RPi 4B
Pisugar S Plus
Made from official Rpi imager, retropie V. 4.8

mitu

Did you disable the onboard audio on the Pi ? What's the output of

aplay -l
aplay -L
amixer

arvis1

@mitu

pi@retropie:~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: MAX98357A [MAX98357A], device 0: bcm2835-i2s-HiFi HiFi-0 [bcm2835-i2s-HiFi HiFi-0]
  Subdevices: 0/1
  Subdevice #0: subdevice #0


pi@retropie:~ $ aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
jack
    JACK Audio Connection Kit
pulse
    PulseAudio Sound Server
speakerbonnet
dmixer
softvol
default
sysdefault:CARD=MAX98357A
    MAX98357A, bcm2835-i2s-HiFi HiFi-0
    Default Audio Device
dmix:CARD=MAX98357A,DEV=0
    MAX98357A, bcm2835-i2s-HiFi HiFi-0
    Direct sample mixing device
dsnoop:CARD=MAX98357A,DEV=0
    MAX98357A, bcm2835-i2s-HiFi HiFi-0
    Direct sample snooping device
hw:CARD=MAX98357A,DEV=0
    MAX98357A, bcm2835-i2s-HiFi HiFi-0
    Direct hardware device without any conversions
plughw:CARD=MAX98357A,DEV=0
    MAX98357A, bcm2835-i2s-HiFi HiFi-0
    Hardware device with all software conversions
usbstream:CARD=MAX98357A
    MAX98357A
    USB Stream Output


pi@retropie:~ $ amixer
Simple mixer control 'PCM',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 255
  Front Left: 204 [80%]
  Front Right: 204 [80%]

I think i disabled the onboard audio, where is that? I'll add my asound.conf file here as well. Thank you for the help! I realised that pulseaudio for some reason is still mentioned here, even though i uninstalled that or i thought i did. I added the asound.conf file as well.



pcm.speakerbonnet {
   type hw card 0
}

pcm.dmixer {
   type dmix
   ipc_key 1024
   ipc_perm 0666
   slave {
     pcm "speakerbonnet"
     period_time 0
     period_size 1024
     buffer_size 8192
     rate 44100
     channels 2
   }
}

ctl.dmixer {
    type hw card 0
}

pcm.softvol {
    type softvol
    slave.pcm "dmixer"
    control.name "PCM"
    control.card 0
}

ctl.softvol {
 type hw card 0
}

pcm.!default {
    type             plug
    slave.pcm       "softvol"
}

arvis1

@arvis1 NEVERMIND, i found the issue. In this thread: https://retropie.org.uk/forum/topic/34661/solved-remove-pulseaudio-and-revert-back-to-alsa/3
The issue was that using purge on pulseaudio did not fully uninstall, so you have to go into the retropie setup as detailed in this guide.