Elka ER 33 FM Synthesis Expander Module

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The ER-33 is an 9 voice synthesizer with 8 oscillators and FM based sound structure very similar to the Yamaha DX 7.

All 8 oscillators can be edited simultaneously or adjusted separately. The first 12 parameters are presented this way on the LCD screen. A second set of editing parameters deal with the overall sound of the instrument. Some of the parameters are Pitch Envelope and LFO Vibrato. A chorus effect rounds out the sound shaping section. A feature in the editing portion is an over all level control for matching volume levels between programs. An additional set of editing features deal with the whole setup of the ER-33.
(Source: synth-db)