The Korg Monotron Delay is the go-to instrument for an ultra-compact synthesizer that features a Space Delay for analog-style echoes. Comprised of only 5 knobs and a wide-range ribbon controller keyboard, the Monotron Delay features an analog filter (VCF) taken from the popular Korg MS-20 synthesizer, an LFO with switchable wave shapes, and a delay with feedback and time controls that can process external audio into spaced out sounds. Like the other Monotrons, there is a built in speaker and headphone jack to be used on the go.