The Korg Monotron DUO Dual Oscillator Ribbon Synthesizer is a compact and portable monophonic analog synthesizer with a ribbon keyboard and built-in speaker. The monotron DUO features dual oscillators for creating a wide range of analog sounds and intervals, and its filter is based on the world famous Mono/Poly synthesizer. There is a filter input for routing external audio devices through the monotron DUO's filter, as well as a headphone output for playing and programming sounds privately. The monotron DUO is battery operated, allowing musicians and enthusiasts the flexibility of a powerful mono synthesizer on the go.

• Two analog oscillators (VCO) with individual tunings
• Edgy X-MOD (with intensity knob) circuit from Korg's classic Mono/Poly
• VCF with cutoff and peak Control
• Ribbon controller keyboard with scale select
• Original Analog (VCF) Filter taken from the classic MS-10 & MS-20
• Aux input jack lets you apply filter to any audio source
• Built-in speaker and battery power for go-anywhere analog sound
• Headphone jack for private use