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Friday, February 20th, 2026 11:44 am

Synth Glossary

Aftertouch:
A means of generating a control signal based on how much pressure is applied to the keys of a MIDI keyboard. Most instruments that support this do not have independent pressure sensing for all keys, but rather detect the overall pressure by means of a sensing strip running beneath the keys. Aftertouch may be used to control such functions as vibrato depth, filter brightness, loudness and so on....

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Eight-Voice
Originally owners of the Four-Voice could expand it to up to eight SEM modules. Shown here is an example of just that. This became the first Eight-Voice. Later Oberheim released an Eight-Voice with two keyboards, (one on top of the other: the top one, a 4-octave(C-C), 49-note, and the bottom one, a 5-octave(C-C), 61-note) and an onboard Digital Programmer which held 16 presets. Currently we have no picture of this one.

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