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Oberheim Xpander (Wikipedia)
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Oberheim Xpander
Synthesizer · United States
The Oberheim Xpander, introduced in 1984, is a six-voice rack-format analog synthesizer module and the architectural sibling of the Matrix-12. Each voice offers two oscillators, fifteen filter modes, five LFOs, five DADSR envelopes, ramp and tracking generators, and a flexible modulation matrix, making it a benchmark of analog synthesis flexibility in a keyboardless module.