The ESQ-1 features eight voices with three oscillators per voice, and is fully multi-timbral. Despite eight voice polyphony, it is capable of tracking nine voices - when using eight internal sounds in the sequencer, one additional internal or cartridge sound can be controlled independently. The wave ROM contains 32 different waveforms, including standard synthesis waveforms such as sawtooth and square, but also less usual ones such as "piano", "voice", or "bass" (note that, although multi-sampled, these are still single-cycle waveforms, not true samples as such).