midierror has released OP-A Loops, a free sample pack featuring a collection of loops made with the OP-A multitimbral FM synthesizer shield for Arduino, created by Frédéric Meslin.
These Loops are free to use and share as you wish, and may be used in commercial music releases – but may not be used in Sample Packs.
The download includes 19 sequences, with individual loops of parts (total of 114 loops at 125 bpm).
OP-A Loops — Download size: 109 MB
Find more free loops and samples here.