Editing Electronic musical instrument (section)

===Polyphony===
{{main|Polyphony (instrument)#Synthesizer}}
Many early analog synthesizers were monophonic, producing only one tone at a time. Popular monophonic synthesizers include the Moog [[Minimoog]]. A few, such as the Moog Sonic Six, [[ARP Odyssey]] and EML 101, could produce two different pitches at a time when two keys were pressed.  [[Polyphony (instrument)|Polyphony]] (multiple simultaneous tones, which enables [[Chord (music)|chords]]) was only obtainable with electronic organ designs at first. Popular electronic keyboards combining organ circuits with synthesizer processing included the ARP Omni and Moog's Polymoog and Opus 3.

By 1976 affordable polyphonic synthesizers began to appear, such as the Yamaha CS-50, CS-60 and [[Yamaha CS-80|CS-80]], the [[Sequential Circuits Prophet-5]] and the [[Oberheim]] Four-Voice. These remained complex, heavy and relatively costly. The recording of settings in digital memory allowed storage and recall of sounds. The first practical polyphonic synth, and the first to use a microprocessor as a controller, was the [[Sequential Circuits]] [[Prophet-5]] introduced in late 1977.<ref>{{Citation
  | last = Wells
  | first = Peter
  | title = A Beginner's Guide to Digital Video
  | publisher = AVA Books (UK)
  | page = 10
  | year = 2004
  | isbn = 2-88479-037-3}}</ref> For the first time, musicians had a practical polyphonic synthesizer that could save all knob settings in computer memory and recall them at the touch of a button.  The Prophet-5's design paradigm became a new standard, slowly pushing out more complex and recondite modular designs.
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