Snapcast Client for Arduino...

[pschatzmann]

I thought it might be cool to have a Snapcast Client for Arduino!

I finally managed to have a first DRAFT version running that integrates nicely with my Arduino Audio Tools project.

I still need to work a bit on the synchronization and it should be quite easy to extend it to support additional codecs...

[luar123]

Looks very interesting, thanks for sharing. How good does your synchronization work? I think this was always an issue with the original implementation (and RAM usage).
There is also this actively developed version https://github.com/CarlosDerSeher/snapclient where synchronization works really well.

[pschatzmann]

RAM is not a problem in my implementation, because I do not store any PCM data.

I have just added the synchronization starting logic today and it looks pretty promising: it can be fine tuned with the CONFIG_PLAYBACK_LAG_MS parameter because this might depend on the selected output (e.g I2S buffer size) and codec.

As far as the fine tuning of the playback speed is concerned, I am not sure what the best approach would be: I am currently thinking about using some dynamic resampling. It would need to be a mechanism which is generally available on the different Arduino platforms and has a minimal impact on the needed RAM.

I have seen that Carlos is using a timer and some filters for this, so this is not really an option...

Any input will be appreciated!