I have a Quectel modem that I use to send pre-recorded audio using the audio over USB functionality UAC. My implementation works fine on a standard raspbian image with a docker container.
I used pulseaudio to send PCM data and followed this guide - Container sound: ALSA or Pulseaudio · mviereck/x11docker Wiki · GitHub
I create a shared socket in the temp file which I use as an environment variable to send audio data, from the docker container to the local default sound card.
I am looking for guidance on a Balena implementation for the same. I have tried balena sound but no luck so far and it does not recognize the UAC port of Quectel modem.
Any help in this regard will be much appreciated.