BalenaSound on Pi Zero with HifiBerry zero does not play

Product support balenaOS
1

Hi There,

BalenaSound on Pi Zero with HifiBerry zero does not play. Some things seems to went fine:

  • Define DT parameters “i2c_arm=on”,“spi=on”,“audio=off”
  • BALENA_HOST_CONFIG_dtoverlay hifiberry-dac
  • DISABLE_MULTI_ROOM 1

The device is visible in Spotify, there is says ’ listening’ . However in the log file:

12.07.20 21:07:55 (+0200) spotify ALSA lib pcm.c:8424:(snd_pcm_recover) underrun occurred

As i read on the forum i tried to disable multiroom (status = Exited) but the bluetooth-audio is still running. I want to disable those because there no need i hopefully the CPU usage will be lower and the underrun will be solved.

Any tips and trics are welcome.

Best regards,

Vincent

4

Hey,
It looks like this is related to audio stuttering issue you can try some troubleshooting methods mentioned here https://sound.balenalabs.io/docs/troubleshooting#audio-cuts-or-is-very-stuttery.

We can also try and reduce the bitrate to 160 and see if underrun issue is resolved. You can update this in spotify/start.sh.

Cheers,
Amit

6

hey Amit,

Thanks for you reply. I went to to the bluetooth-audio termal i found a start.sh in /usr/src. Howto edit this file in BalenaCloud? (I’m a BelenaCloud newbie)

Thanks in advance!

Best regards,

Vincent

7

Hello Vincent, I think the file Amit was referring to should be https://github.com/balenalabs/balena-sound/blob/master/spotify/start.sh Did you deploy balena-sound directly though the Deploy to Balena button?
If changes need to be made to the application then you will need to go through the “manual” deploy steps. Have a look at https://sound.balenalabs.io/docs/getting-started#one-click-application-creation-and-deploy for more information and let me know if you need any other help with this.

Best,
Giovanni