Livelooping meta-trombonist Sylvain Poitras is also a software wizard.
Here are two videos demonstrating Pure Data patches, played on the Organelle:

As a bonus track, here is the amazing piano improvisation he came up with recently when his cold was so bad that he couldn’t play trombone:

and of course, his meta-trombone as performed on the 2013 Cologne livelooping festival: