Csound – an open source user-programmable software sound synthesizer is now available on Android.
Csound contains a full complement of digital oscillators, samplers, filters, envelope generators, random number generators, physical models, sound granulators, phase vocoders, and other unit generators.
Users write instrument definitions in Csound’s orchestra language to render notes written in Csound’s score language, played on a MIDI controller, or generated within the orchestra or by some other programming language.
The app integrates with text editors so that the app itself can be used to develop Csound pieces.
The app was originally written by Victor Lazzarini and Steven Yi, and has been extended and is currently maintained by Michael Gogins.