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Korg Lambda ES-50 Vintage Polyphonic Analog Synthesizer Keyboard, Fully Serviced w/ Cover & Case


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Up for sale, a Korg Lamdba ES-50 vintage synthesizer in exceptional condition and in perfect working order, fully serviced and complete with the original Korg-branded slip cover and aftermarket case. The Korg Lambda is a fully polyphonic 48-key preset synthesizer, and this example is exceedingly well-kept, freshly serviced by Synapse Audio Systems who replaced over 200 leaky capacitors to ensure trouble-free use.

The Lambda ES-50 features two banks of sounds. Percussive (Electric Piano, Clavi, Piano, Harmonics) and Ensemble (Brass, Organ, Choir, Strings I, Strings II). These presets are all available simultaneously, ideal for thick layering, and each key is articulated independently (ensuring none of the "note stealing" pervasive in synths with fewer voices).The Percussive sounds have a fast attack and variable decay envelope, and the Ensemble sounds have both preset and variable attack/release envelopes.

The Lambda uses divide-down technology with three oscillators that are mixed and filtered using fixed circuits to create the preset sounds. The control panel boasts controls for basic low-pass filtering of the Percussive and Ensemble tones, and each bank of sounds has its own dedicated Volume slider and Tone knob. There is also a control for "click" (used to add attack to the EP sound) and a filter cut-off control for the Brass sound, which has its own paraphonic filter - tuned to give a slightly resonant peak to the sound, and with its own preset filter envelope.

An Octave switch puts the keyboard in regular or Octave Down mode. The three oscillators can be detuned to thicken the sound further, and analog chorus can be independently applied to the Percussive and Ensemble sections. The joystick acts as a pitch bend control, doubling as a sweep control for the chorus. Vibrato can be switched off the Ensemble sounds, and Percussive sounds feature a variable Tremolo and a Sustain switch that turns Decay into a Release.

Outputs include Headphone out, the Mono Mix out, L/R Stereo outputs, and a short-to-ground Keyboard Trigger output, with Sustain and Expression pedal inputs as well.

Cosmetically, this synth is extremely well-kept, with only extremely light wear on the hardwood veneered frame. All original knobs and slider tips are intact, and the key caps are bright white.

The case has light padding, with functional latches and some stickers on the exterior, and the original tan Korg-branded slip cover is included.