Fatsondo - Version 1.0 The Fatsondo MIDI Synthesizer is a plugin (VSTi), which has been tailored made for the creation of fat sounds. In addition, it has a built-in chorus, flanger, stereo delay, comes with 64 factory patches and a 17 page 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, 3 oscillators per voice (which can be extended with the unison function) and built-in effects.