Electro-Harmonix Superego Synth Engine Pedal The Superego Synth Engine reinvents sample and hold, performs fluid glissandos and creates oscillator like, synthesizer effects. It can stack sounds or create infinite sustain, it even lets you tweak attack and decay, or use its effects loop to invent novel synth patches.
Auto mode captures and freezes notes and chords as you play
Sustain notes and chords as long as wanted
Insert effects into the wet signal with the effects loop