Siel mono

Monophonic Synthesizer (1981)

Vintage Monophonic synthesizer from Italy featuring 10 presets and a limited edit mode. The successive SIEL CRUISE implemented a polyphonic section

User manual Service manual

Overview

OVERVIEW synthesizer 37 keys, no velocity. Main panel features 32 levers, 2 buttons and 22 diodes leds , on left side there is a horizontal pitchbender joystick and a slider for portamento level.

Terminal connectors:

- audio output with high low impedance

- volume swell pedal input with din connector

Sound

OSCILLATORS Subtractive synthesis generates 1 voice of polyphony. The SIEL voice is composed by 1 digital oscillator DCO bbased on M110B1 SGS IC + 1 pink noise circuit . When set in edit mode (the "FREE") it is possible to edit a few DCO parameters.
- 2 Waveforms :saw / square octaves 4' 8' 16' 32'

M110B1 SGS IC custom IC

MEMORY Preset list: basso tuba, piccolo, trombone, sax, trumpet, flute, violin, guitar, bass and clarinet.

EFFECT a single fx is onboard ANIMATION which is an analog chorus based on TDA 1022.

FILTER: Resonant VCF is multimode (better than Cruise)
- lowpass
- highpass
- bandpass