AudioKit is an audio synthesis, processing, and analysis platform for OS X, iOS, and tvOS.
Live-Code Prototyping - AudioKit 3 uses native Xcode Swift Playgrounds to allow you to develop instruments in real-time with immediate audio feedback.
Synthesizers and FX - Create sounds with many synthesizers, physical models, and sample playback operations, and then process those sounds with effects, filters, delays, reverbs, and more.
Powerful Sequencing - AudioKit now features a full MIDI Sequencer with EXS24 and SoundFont samplers which can be tied to your instruments for awesome, accurate playback.
Swift - While audio processing is done in lightning fast C and C++, the Swift code you will write is beautiful, expressive, and sexy, like Swift!
FMOD Studio is an adaptive audio tool and engine for games