Sequential Circuits Siel Prelude Vintage Synth

via this auction

"These were Made In Italy by Siel for Sequential Circuits

FEATURES:
o LFO.
* Pitch bend.
* Master tune.
* Master volume.
* Modulation:
o Amount, Flande, Speed, Depth, Delay.
o Indicators for: Chorus, LFO.
* Brass:
o Attack, Cutoff, Brass1, Brass 2, Swell, Resonance.
* Piano:
o Decay, Piano 1, Clav, Piano 2.
* Organ:
o Pipe, Organ 1, Organ 2.
* Program select:
o Brass, Piano, Organ, Strings.
* Strings:
o Attack, Release, Cello, Violin, Mute, Percussion.

# Back-panel shows:
* Connectors for:
o Input, Footswitch.
o Audio output: High/ Low.
* Jack for:
o Volume pedal."