I'm trying to get started with programming a small synthesizer (wave generator) on my raspberry pi 3a+. To start off, I tried to use python's sounddevice module to play a stream from a numpy - array. However, my raspberry pi doesn't output any sound, which is weird, since the exact same code works perfectly fine on my laptop and produces a nice, steady sine - wave tone, like you'd expect.
The code I used is basically just a copied example code from the sounddevice documentation, it can be found here: https://python-sounddevice.readthedocs.io/en/0.4.1/examples.html#play-a-sine-signal
I think downloaded all required modules on my pi (portAudio etc.), as I have downloaded the same ones on my laptop, where the code works.
Could it be that sounddevice just can't handle some part of the pi's hardware, or that I messed up somewhere in the ALSA - settings (although I checked several times)?
Interestingly, the pi plays sound perfectly fine with the simpleaudio - module, which is sadly not versatile enough for what I'm planning to do, which is why I need sounddevice or something similar. I'd be very thankful if someone could help me here.
You need to set the samplerate in /etc/asounc.config to whatever samplerate you plan to use.
pcm.!default {
rate 48000
type hw
card 0
device 0
}
ctl.!default {
type hw
card 0
}
Your applications will need to use this samplerate to work corretly so ensure that it is set properly in you code.
Hopefully this solves your issue