The Fatsondo MIDI Synthesizer is a plugin (AU), which has been tailored made for the creation of fat sounds. In addition, it has a built-in chorus, flanger, stereo delay, evolution editing, comes with 256 factory patches and a manual (Adobe Acrobat). The main features are a polyphonic unison mode, a unique processor module, which can switch between different functions, a warm and resonant lowpass/highpass filter (Moog style), 3 oscillators per voice (which can be extended with the unison function) and built-in effects. The bundle inludes 11 other plugins.