Raspberry Pi Guitar Amplifier

While trying to make this work, I came up with a lot of ideas and most of them didn't work. I made a lot of test programs and in the event that any of them might help, I've uploaded them all to the github repository.

https://github.com/dsagman/guitarpedal

I'm working on the looper. Step one is to try to get a program where I can:

1. press a key to start recording
2. press a key to start looping (and stop recording)
3. press a key to stop the looping and wait to start over again at 1 with next key.

I've managed to do that here:

https://github.com/dsagman/guitarpedal/blob/main/keypress.py

It was trickier than I expected. There's some oddities with the callbacks and pyo objects and the audio player not working if it was outside of the callback function. No idea why. But it works on my linux machine and now I need to get it working on the raspberry pi.

Next steps are to get it working as part of the existing pedal program and to wire it up to a button attached to a GPIO pin. I'm hoping to get an LED that blinks while recording, steady while looping, and then off when not active.

Maybe easy. maybe not so easy.

Overly long video on every code line. 

I've downloaded the OBS software for recording my computer screen and audio input. I'm going to try and do a code review video, but, as always, there's another tool to learn and figure out. That said, OBS seems quite good. Fingers crossed. Including the one I electrocuted the other day.

I had done a lot of the work here with my guitar teacher, Ben McMunn, who I've now figured out how to add to the project. Ben is building his own version using a raspberry pi 2. I'm going to try and get him to upload his photos here.

I just figured out how to make the chatroom public. I hadn't realized it is private.

Updated the Python code to fix for the fact that I wired all the pot backwards. Updated code on Github.

Also, working on making a looper effect. I've got a button working, but now have to figure out how to record the audio and play it back in a loop!