via this auction
"The SX-210 uses DCOs (1 per voice) with traditional analog VCF (filter) and VCA envelope generators. It features 8-voice polyphony, a 4-voice mode using 2 DCO per voice, and a monophonic unison lead mode (8 stacked oscillators!!). Program changes are entered using a global "Increment" wheel sort of like those used on the Roland Alpha Juno series. Fortunately its implementation is much better on the SX-210 - just hit a parameter switch and adjust the dial to the desired value or effect. The downside is there are only 32 memory patches. The oscillator section offers 3 waveforms, a sub-osc and PWM control plus a noise generator. The low pass VCF (filter) has its own ADSR envelope generator. There's also a high pass filter. The LFO can modulate both DCO, VCF and VCA, all at the same time! It is also one of the only synths to feature both glissando and portamento. A pretty rare machine for only few thousands made."
