Monophonic synthesizers with more than one oscillator (such as the ARP 2600) can often be patched to behave in a paraphonic manner, allowing for each oscillator to play an independent pitch which is then routed through a common VCF and VCA. For example, playing a new note on top of notes already held might retrigger the volume envelope for the entire sound. The result is a synthesizer that can play chords, provided all the notes start and end at the same time ( homophony). Paraphonic synthesizers, such as the Solina String Ensemble or Korg Poly-800, were designed to play multiple pitches at the same time by using multiple oscillators, but with a common filter and/or amplifier circuit shared among all the voices. When only one key is pressed, both oscillators are assigned to one note, possibly with a more complex sound.
When two or more keys are pressed simultaneously, the lowest- and highest-note will be heard. These synthesizers have at least two oscillators that are separately controllable, and a duophonic keyboard that can generate two control voltage signals for the lowest- and highest-note. Well-known monosynths include the Minimoog, the Roland TB-303, the Korg Prophecy, and the Korg Monologue.ĭuophonic synthesizers, such as the ARP Odyssey and Formanta Polivoks built in the 1970s and 1980s respectively, have a capability to independently play two pitches at a time. This does not necessarily refer to a synthesizer with a single oscillator The Minimoog, for example, has three oscillators which are settable in arbitrary intervals, but it can play only one note at a time. See also: Synthesizer Monophonic Ī monophonic synthesizer or monosynth is a synthesizer that produces only one note at a time, making it smaller and cheaper than a polyphonic synthesizer which can play multiple notes at once.
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