Synth Glossary

Analog Synthesis:: This term is normally used to refer to the tradional synthesis model used by analog synthesizers in the 1970s. It is also known as subtractive synthesis. It involves oscillators, the outputs of which are mixed together and fed into a filter (where certain frequencies are subtracted) after which they are fed through an amplifier. The amplifier and filter are normally also driven by envelope generators....

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An enhanced version of the OB-X, the OB-Xa also was "available in four-, six-, and eight-voice configurations, offered 32 program memories, polyphonic portamento, and polyphonic sample-and-hold", and in addition to that, it "offered the ability to split the keyboard, or double up the voices so that two voices would sound for each key that was depressed."

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