[sdiy] TeensyLooper

Heitor Alves theatomlabspt at gmail.com
Thu Jan 29 13:09:56 CET 2026


Hi All

https://github.com/HeitorAL9000/TeensyLooper

TeensyLooper
An audio looper with reverse capabilities and low latency, reverb and based
on the Teensy (4 and 4.1) platform.

This project is born out of the "need" for a simple audio reverse tool for
my live setup. It will be connected to the AUX1 send/return bus on my
console but the main use will be to record and reverse spoken words from
old vinyl records. A unit that samples a few seconds of audio (mono) and
reverses it playing it in loop mode.

The base is a Teensy 4.0 and it has a 4 second sampling time @ 44.1khz
sampling rate 16 bit resolution. You can use a Teensy 4.1 that will
increase the sampling time to 8 seconds.

First interaction:

one input one output Rec button Kill button Loop or single shot switch
Reverse or forward switch

Code for 4 seconds To Do:

PCB
Front Panel
test reverb FX Code
Test add ons (second interaction)
Second interaction:

Added GATE/TRIGGER control for record and kill function Added Reverb FX
(via code and Open Source Library) Added Reverb Size potentiometer Added
Reverb WET/DRY potentiometer

Feel free to try it, hack it, change it. Any suggestions are welcomed and
if you find bugs or improvements let me know :)

I'm no serious coder so i admit i used chatgpt for the coding part.
Hardware wise it's pretty straightforward :)

Thanks for taking time reading this
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