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Oberheim Xpander - Desktop Matrix 12 Synthesizer - $5,000 (hercules, pinole, san pablo, el sob)
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No trades please. Price firm.
https://www.vintagesynth.com/oberheim/xpander#google_vignette
The Xpander is a six-voice desktop version of the Matrix 12 with which it shares an identical voice architecture. In many ways they are the most flexible non-modular analog synths ever built. Each voice has five LFOs, each with about five different wave shapes, plus the ability to sample most other modulators; five envelopes that can repeat themselves, sync to an LFO, and so on; a lag processor (like portamento, but more general); three tracking generators (that apply a series of linear functions to a value over its range); some ramp generators (the attack portion of an envelope); a 15-mode filter and a user interface to make all of this accessible.