I’m having so much fun making this I thought I would share.

I am working on a simple, cheap, easy to construct multi-effects guitar pedal based on the Raspberry Pi Pico microcontroller. All of the other parts are generic parts. So far I have implemented the following effects:

Noise gate, Delay, Room, Combine Effects, Bandpass Filter, Lowpass Filter, Highpass Filter, Allpass Filter, Tremolo, Vibrato, Wah, Autowah, Envelope, Distortion, Overdrive, Ring Modulator, Flanger, Chorus, Phaser, Backwards (play the last few samples backwards), Pitch Shift, and Octave (rectification).

Some effects can be cascaded inside the device. There are up to 16 “units” where each processing stage can process the results of the last stage. Various controls on the effects can be assigned to the four potentiometers at the bottom of the board, or two expression pedals you can plug into the side.

I also added a VGA output because I want to have a cool video display that changes with the audio. Also, perhaps implement some kind of guitarsynth or MIDI control.

Anyways this has been a lot of fun to make. I hope others will enjoy it too.

https://www.github.com/profdc9/GuitarPico

You are viewing a single thread.
View all comments View context
4 points

So presuming there’s also some DAC/ADC latency too … that still seems pretty fucking good no?

permalink
report
parent
reply
4 points

The ADC is run at 50 kHz, which is divided in half between the instrument itself and reading the analog controls. Every 40 microseconds the ADC is read, and the effects are processed in order, and then on the other half of the 40 microsecond cycle, the DAC is set.

permalink
report
parent
reply

guitars

!guitars@lemmy.world

Create post

Welcome to /c/guitars! Let’s show off our new guitar pics, ask questions about playing, theory, luthier-ship, and more!

Please bring all positive vibes to the community and leave the toxic stuff elsewhere.

Banner credit

Rules:

  • Treat others with respect. ALL others.

  • No spam

  • No self promotion

  • No NSFW

  • No circle jerk posts, there are other places for that silliness, and they are wonderful. Not here.

Community stats

  • 181

    Monthly active users

  • 261

    Posts

  • 1.9K

    Comments

Community moderators