The ES1 emulates the circuits of analog synthesizers in a simple, streamlined interface.

ES1 produces sounds using subtractive synthesis. It features an oscillator and sub-oscillator that generate harmonically rich waveforms. You subtract (cut, or filter out) portions of these waveforms and reshape them to create new sounds. The ES1’s tone-generation system also provides flexible modulation options that make it easy to create punchy basses, atmospheric pads, biting leads, and sharp percussion.

If you’re totally new to synthesizers, it might be best to start off with Synthesizer Basics, which will introduce you to the terminology and give you a great overview of different synthesis systems and how they work.