I am working on a human interface for volume rendering.

The livid ds1 mixer uses midi through USB.

http://lividinstruments.com/products/ds1/

I should be able to use python midi libraries for access. 

This leads to the problem of the midi implementation, and a question as to a similar implementation for chimera2.

One implementation would insert into the event loop, another approach could be tied to a frame/trigger callback. 

Any suggestions?