pyo for synchronizing audio loops

[3d0sc4]

Hi everyone,

I want to first state that I'm pretty new to Github, programming, and just all of this stuff in general! So please be patient with me.

I recently purchased a Raspberry Pi 5 to use as the brain of an interactive audio installation. In short, I'm planning on using hall-effect sensors (Via GPIO pins) that detect the presence of a block containing a magnet. When a block is placed, it triggers looped playback of an audio file. When a block is removed, that audio file stops playing.

Currently I'm just trying to build a prototype, and am just getting my head around the RasPi, Linux, IDE workflow, etc.

- It seems pyo uses portaudio. How stable is portaudio?
I read some things that imply portaudio has some issues with jitter/stability. My installation needs to run reliably for 6+ hours, so stability is paramount for my needs.

- What method is recommended for creating a master clock, and syncing audio playback to this master clock?
I need to ensure that playback only starts on a downbeat, no matter at what point in time the sensor was triggered - thus the need for a master clock. Currently I'm thinking phasor and tableread will be necessary. Any pointers here?
Note: I don't require time-stretching or anything of the sort. All audio files will natively be the same tempo.

Any advice is massively appreciated. Thanks!

[alexdrymonitis]

Hi and welcome! About portaudio I have no answer, but you can also use jack wtih Pyo and that should be stable.
About your master clock, perhaps the Metro class (https://belangeo.github.io/pyo/api/classes/triggers.html#metro) together with Counter (https://belangeo.github.io/pyo/api/classes/triggers.html#counter) could probably do the job.

[3d0sc4]

Thanks for your reply. I think you're right about Metro and Counter.

Phasor + TableRead is probably way overkill for a musical application, and likely too complex for a beginner like me anyway.