Yamaha Synthesizer The Reface CS from Yamaha is an analog modeling synthesizer offering simple controls and complex sounds in a small sizeBased on the CS-80 synthesizer, the CS or "Control Synthesizer" is a re-imagined interface providing 8-note polyphony with five oscillator modules capable of creating a variety of sounds from analog to digital. The CS's front panel offers dedicated sliders for all functions, making sound design and exploration fast and easy. The oscillator section offers five waveforms with additional texture and mod controls, while the 18 dB-per-octave low-pass filter offers cutoff frequency and resonance controls. The envelope generator features the classic attack, decay, sustain, and release (ADSR) controls. An envelope generator balance slider assigns the control to the filter when at the top, or the amplifier at the bottom, and blends the two when placed in the middle. The LFO or low-frequency oscillator offers a fixed waveform with a four way switch to route th