YAMAHA SS 30

via this auction
"Control section running from left to right
pitch/ detune - The outer pot adjusts the overall tuning and the inner pot detunes the voices against the pitch which can produce a wonderful thickening effect ( some sources describe this synth as a duphonic/ multiphonic ,others describe it as a 4 voice polyphonic. I have a feeling it is a 4 voice polyphonic but the 4 voices are split between cello (two tones) and violin (2 tones) . It then uses divide down chips enabling all keys to be played at once)
Orchestra -Depth ( Speed 1/2 ,cello ,violin ) A great ensemble effect with 2 different effect types (speed) and the ability to separate the effect between cello and violin ( so you can have ,for example cello effect and violins dry )
Vibrato ,Delay/Depth- Very nice vibrato effect.
Sustain, Cello /Violin - sustain 1 control each for cello and violin giving again the ability to have separate amount of sustain for cello and violin sections . Very short to very long .
Keyboard split 0/1/2/3 .0 setting is no split and just the violin sound over the whole range. 1 gives a split with the lowest octave for cellos the rest strings. 2 setting gives 1 and a half octaves to the cello . 3 gives 2 octaves to the cello. The splits are indicated by a white dot above the note on the control panel
Cello ,Volume, attack/slow ,cello1/cello2 - control section for cellos giving control over attack fast/slow. Choice of 2 cello sounds.
Violin Attack/Slow, Viola/violin1/Violin2 /Volume - Same as cello control section though the volume is at the far right.
Brilliance Cello/Violin Very usable low pass filter for cello and violin."