OSC1 (Oscillator 1) allows one to select from eight different oscillator algorithms, including basic analog synthesizer waveforms such as SAW and PWM, Cross Modulation, a Noise Generator, and Korg's proprietary DWGS (Digital Waveform Generator System) originally developed for the Korg DW-8000 synthesizer. The DWGS waveforms allow the creation of bell and electric piano-like sounds. The Noise Generator produces white noise which can be used for sound effects and introducing harmonic distortions to waveforms. An external signal such as a mic, instrument or line input from the AUDIO IN 1/2 jacks can also be processed.