Pico making crackling sound when audio is played via mp3audio on circuitpython
March 1, 2023, 18:29
So i'm making a portable soundboard using a raspberry Pi pico but the sound crackles when audio is coming through. It has an amp so power isn't an issue?
what filtering circuit you used?
<@341973065057566720>
or what it is
then how did you connect your amp to pico?
One se
sec
since pico does not have any audio output
This is the circuit
so no filtering at all.
no wonder you get digital crap.
😦
Whats a filtering circuit
I am trying to learn
you can get inspiration in bigger brother's schematics.
you need to filter out high frequency and DC component from the signal.
if you use this circuit with these exact values, it'll do good enough job.
Alright, thank you
I found this do you think this would do the job>
you can most probably ommit U5 and C88, obviously D4 is not necessary either.
that is basically what that circuit above is, except for DC separation
Alright Just gotta find a capacitor like that lying around
that's what C86 / C89 are for
100nF ?
or 47 micro
Idk im just looking through my minimally small capacitor collection to find a 100nf
tis cerramic.
Is it this dude?
I read of part numbers cause that’s how I was taught
Bit clueless apart from that
Wait nvm it is the right one
no probs 🙂
filtering high-frequency crap solves issues caused by high-frequency crap 😄
Learning new things everyday