Yamaha REFACECS Analog Synthesizer - 37 Mini KeysThe 8 note polyphonic Virtual Analog reface CS has five unique oscillator modules for an incredible variety of sounds from analog to digital, 4 effects, integrated phrase looper, continuous input for volume control, MIDI connectivity, aux input, and dual line outputs. Features Analog Physical Modeling Engine with multiple synthesis and oscillator types. Each oscillator type has flexible LFO and ADSR routing plus unique Texture and Mod controls.