The Synthotron is bringing the psychedelic fire of analog synth sounds to your guitar. The Synthotron is an all analog (100% pure analog) synthesizer, envelope filter/ sample hold pedal. The Synthesizer section and the Filter section can be used independently or simultaneously – in essence two effects in one box – the Synth comes first and the Filter last. Bathe in the glory of twin voices, amplitude modulation, envelope filtering, sample hold, as well as octave up and down.