Oberheim OB-1

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The Oberheim OB-1 was a monophonic, programmable, analog synthesizer introduced by Oberheim Electronics in 1978. It originally sold for $1,895 and was the first analog synthesizer capable of storing patches. The design was a replacement for the previous generation of Oberheim SEM (Synthesizer Expansion Module) based instruments and intended to be used for live performance.

The OB-1 is monophonic version of the Oberheim OB-X, with two VCOs and a Low Pass filter. It also contained an envelope control for both the filter and amplitude.