San is a hybrid synthesizer. It features two analogue oscillators (with two FM oscillators) and a phase distortion oscillator. Each sound generator can be mixed between two of three variable state filters. Many of the parameters in San can be modulated by three multi-routable, multi-rate LFOs, two ADSR envelopes and one 8 stage envelope. There is also a simple flanger/chorus and distortion effect.
San's second panel has a quick guide to some of its features as well as a MIDI controller ID list.