The Korg Monotron Duo is a battery powered palm sized analog synth. This fun and easy to use synthesizer has a ribbon controller and simple 5 knob 1 switch operation. Plus its two oscillators deliver an aggressive extreme sound that will stand out in any live performance. Dual Oscillator The Korg Monotron Duo has two oscillators delivering a more extreme sound. Tune them in unison for a rich thick analog tone or in intervals for classic solo sounds and generating new effects. The X-MOD (cross modulation) circuit can introduce a mild or razor-sharp edge to the overall sound; everything from a rich vibrato to extreme metallic sounds reminiscent of an FM synth. Ribbon Controller The Duo had a ribbon controller keyboard that features a Scale function which selects one of four scales – Chromatic Major Minor or Off. Choose the Chromatic scale to play precise pitches as on a piano or choose Major or Minor to generate musically coherent phrases by simply sliding your finger around on the keyboard. Korg Filtering The distinctive tone of an analog filter (VCF) can dramatically alter and enrich the sound. The monotron DUO uses the same highly acclaimed VCF circuit as KORGs classic MS-10 and MS-20 semi modular synthesizers. The VCF Cutoff knob sets the frequency or tone of the filter; the VCF Peak knob adds emphasis. A powerful filter is an essential aspect of any analog synthesizer applying dramatic tonal changes to the sound and projecting an intense personality that will stand out in any live performance. Fully Patchable Filter The input jack (AUX input) built into the Monotron Duos compact body allow you to place any audio source into the signal path directly before the analog filter. This provides a great way to connect a Kaossilator a guitar or a digital audio player to the monotron and enjoy tone-bending filter effects. Compact and Portable A miniature speaker is built into the monotron Duo. Along with the battery operation and compact size this feature allows you to enjoy the monotrons analog synthesis sound with your friends anywhere at any time. Theres also a headphone output that you can use when practicing in private creating sounds at home recording or for connecting to an amplifier or PA system. Features Two analog oscillators (VCO) with individual tunings Edgy X-MOD circuit borrowed from Korgs classic Mono/Poly 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 Specifications Synthesizer structure: 2 VCOs with X-Mod; 1 VCF Switches: Standby / VCO1 / VCO1+2 Scale Select Button: (Chromatic -> Major -> Minor -> Off) Knobs: VCO1 Pitch X-MOD Int. VCO2 Pitch VCF Cutoff VCF Peak Controller: Ribbon Controller Volume: Headphone Volume Aux Input: 1/8″ Stereo Jack Headphone Output: 1/8″ Stereo Jack Speaker: Miniature Internal; Disabled when headphones are in use Power Supply: AAA batteries (x2) recommended alkaline batteries Battery Life: Approximately 8 hours (with alkaline batteries) Dimensions: (W x D x H) 120 mm x 72 mm x 28 mm / 4.72″ x 2.83″ x 1.10″ Weight: 95g / 3.35 oz. (without batteries) Accessories: AAA batteries x2 (for verifying operation)