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Siel Mono

Mono and polysynthesizer (1981)

Siel Mono

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

 Main Data 

Siel MONO

Company: SIEL
Model: Mono
Class: synthesizer
Country: Italy
Weight: 7 Kg
Dimensions: n/a
keyboard: 37 keys
Dates: 1981
Price: 300€ trend up

Display: none
Synthesis: subtractive
Technology: analog 
Polyphony: 1 (mono)
Envelope: 1 EG ADSR
Filter: Band Pass, High Pass, Low Pass, Resonance
LFO: 1 modulator
Effect: analog chorus
Memory: 10 presets
Polyphonic Gen: TDA 1022 
Monophonic Gen: M110B1 

sadly there is not CV control and of course no Midi. 

SYNTH 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.

Rear panel terminal connectors:
- audio output
- volume swell pedal input.

NO factory reset procedure


NO official  VST

if you have some free samples you want to share CONTACT US

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 In details 

CPU

Subtractive synthesis generates 1 voice of polyphony.


The SIEL voice is composed by 1 digital oscillator DCO + 1 pink noise circuit . When set in edit mode (the "FREE") it is possible to edit a few DCO parameters.

1 DCO oscillator

1 voice DCO based on M110B1 SGS IC

2 Waveforms

saw / square 
octaves  4' 8' 16' 32'

1  noise generator

pink noise

Siel MONO

Mono section 

 Basically the the oscillator DCO is pretty simple with just sawtooth / square shape + an octave setting at 4' 8' 16' 32.  When set in edit mode (called mode "FREE") it is possible to access direct DCO edit. 

10 presets

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

Octave

4 different octave feet settings: 4' 8' 16' 32

MONO preset
IC M110B1-IC
SIEL  MONO IC

ZANZA

Effect

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

LFO / EG / FILTER

Filter

FILTER 

Resonant VCF is multimode:
- lowpass
- highpass
- bandpass.

LFo

LFO

1 delayed triangle modulator with adjustable depth parameter and 1 of the 2 destinations:

1- DCO pitch
2- VCF cutoff.


Envelope

Envelope

a single EG type 4 segments ADSR.

Siel Monosynth

Our Verdict 

"Basic entry level mono synth with excellent multimode filter, but sadly no Midi / CV!  These SIEL are getting hard to find  " 

Sound 
quality

Interface

Build
 quality

Rarity

Quality / 
price

Overall

CONS

- No CV controls
- limited edit


PROS

-analog
 - quite rare

Are you a SIEL MONO fan how do you use it? You do not agree with our review?  Let us know in the comment field just below 

DISQUS COMMENTS WILL BE SHOWN ONLY WHEN YOUR SITE IS ONLINE

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Siel MONO related gallery

Siel MONO audio demo

ZANZA

 Video demo

SIEL MONO SIEL MONO
62 out of 100 based on 1 user ratings
200 to 300 from 1 sellers Sellers: