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CTS = Cross Table Sampled
"This is a very rare italian SIEL KEYTEK CTS 2000 vintage synthesizer with analog resonant filters in excellent working condition. It has 2 oscillators per voice, 8 voices and analogue CEM 3389 filters, the same as in the Waldorf Microwave I. Cross table synthesis is a kind of wavetable synthesis - with 333 digitally sampled waveforms -control up to 6 wave tables per voice with complete analog processing for each voice incl. 24db per octave filter. 2 times 5 parameter envelope generators & 3 LFO's. 6 data entry slider for realtime editing of all parameters."