this post was submitted on 08 May 2024
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It should be possible, but the answer is going to depend on your implementation, what libraries you are using, and so on.
For example, if the play sound action is synchronous, then maybe you could start it up in another thread, and interrupt that thread if you want to cancel the sound.
If it’s asynchronous, maybe you need to retain a reference to the sound object and then invoke a stop() call when the other button is pressed.
Okay, I've got it offloaded to a different process and I can cancel that process now. However, is there anything I need to do to let it access GPIO? It looks like it's working but nothing is coming out of the passive buzzer when I'm playing it off the other process.
EDIT: I think I got it with threading. Thanks!
Great to hear you got it sorted! May I ask out of curiosity which library you are using to play sounds?
I converted this into python; you can see it here.
Edit: Err, you will be able to see it there once I get to my laptop and make it public.
Edit: Public now!
Ah nice, you’re GPIO to generate tones with PWM. Very cool!