I've been active in two open-source projects, both of which have the goal of making audio programming easier for developers:
- AudioKit For a little over the past year, I've been a core contributor of AudioKit, an open-source audio analysis, synthesis, and processing toolkit for iOS and OS X.
- Soundpipe Recently, I've become active in contributing to Paul Batchelor's Soundpipe project. Soudpipe is a lightweight music DSP library, designed to be easily extendable and embedable.
I also made a simple demo of how an AudioKit oscillator OS X app can be controlled with an Arduino: Arduino-AudioKitOSX
Early in the year, the first app I was involved with was released on the App Store: