Okay it is not a Android app but the developer is and part of this web browser instrument can be found in his Android app - Mikrowave. ( He also made the funky controlled chaos rhythm machine Kosm). The big reason for posting this is to get the idea how to use a chiptune based sound for a live drone manipulation. It is working pretty good!
Please, pretty please make a donation to
Musical android You can do it! It will feel amazing afterwards!!!