DIY Teensy Looper Multiplies Music

If you’re into electronic music, chances are good that you like to roll your own. While step one is usually to build something, anything that makes sound, a natural step two is to build a looping device to extend and play with those sounds.

[Cutlasses] has finished version one of his Teensy-based Eurorack-style looper. He plugs in a thing, records some tunes, and the resulting loop gets divvied up into eight equal pieces. He can cut the loop together live using the eight buttons to jump around between sections. It supports unlimited overdubs, although too many will cause clipping. But hey, that just means free derivative sounds.

The looper records its audio to an SD card. Since this is typically a slow endeavor, [Cutlasses] used two circular buffers. One reads audio, and the other writes it. This took a lot of trial and error, which he may have to repeat with future SD cards.

[Cutlasses]’ plans for future versions include a separate audio CODEC for better sound, CV control, and a pedal option for hands-free operation. We’d love to hear some sweet Theremin loopage, wouldn’t you? Jog past the break to watch [Cutlasses] demo his looper with a kalimba and a DIY noise box that uses a string bow to make metal tines sing.

Feeling out of the music-making loop? There are (slightly) easier ways. Check out this LEGO looper or this multiplayer Pi-ano.

10 thoughts on “DIY Teensy Looper Multiplies Music

  1. A lesson in performance ergonomics or rather the lack of. Having to reach under and thru cables over the control area. Having to move a knob in increments that should be able to be turned any which way quickly or slowly over a wide range. Having plugs in the way. The pocket operator small form factor leaves little room for fingers to perform.

    I use Mobius, a free looper of 8 track complexity with nearly 100 commands. Windows only, no Linux options come close. Controlling it is mapped to qwerty, so a number pad is enough to play with it. In MIDI you can do anything, there a big control surface will be the most fun to play on.

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