Version 1.0
Teensy Audio Library
http://www.pjrc.com/teensy/td_libs_Audio.html
This is the first stable release, after more than a year in development, from its humble beginning in August 2013 when the only functionality was generating a sine wave.
http://www.dorkbotpdx.org/blog/paul/quality_audio_on_teensy3_with_arduino
Version 1.0 features 43 different objects, for input, output, mixing, playback, recording, synthesis, analysis, filtering, and controlling external parts.
This release marks the beginning of a stable API, which Arduino sketches may depend upon for compatibility with their projects, as development continues and more features are added.
Future versions will likely add features from this development roadmap: