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Siel Cruise

Mono and polysynthesizer (1981)

Siel cruise

 Combo string processor with monophonic section based on DCO manufactured by Italian Società Industrie Elettroniche during early eighties.  The monofonic section is partially derived from previous MONO model, but CRUISE misses some of its original features.

 Main Data 

Siel Cruise

Company: SIEL
Model: Cruise
Class: synthesizer
Country: Italy
Weight: 7 Kg
Dimensions: n/a
keyboard: 49 keys
Dates: 1981
Price: 500€ trend up

Display: none
Synthesis: subtractive
Technology: analog PWG
Polyphony: 1 (mono)+ 49 (poly)
Envelope: 1 EG ADSR
Filter: lowpass
LFO: 1 modulator
Effect: analog chorus
Memory: 10 presets
Polyphonic Gen: TDA 1008
Monophonic Gen: M110B1 



KEYBOARD 49 keys with no velocity.  Main panel features 44 levers and 6 buttons - on the left part a pitchbender joystick with a control slider for portamento level.

Back panel terminal connectors:
- main signal out
- monophonic section separate out
- polyphonic separate out
- 5 dins input for volume swell pedal
- sustain footswitch for piano part
- decay footswitch for polyphonic section
- master tune trimmer.

NO factory reset procedure

DEPUTY MARK II

FREE VST.
NOT official !

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 In details 

CPU


The Cruise keyboard sound generation is fully analog and split into 2 main sections: 

A- monophonic

B- polyphonic

monophonic

partially derived from mono synthesizer based on M110B1 SGS IC

Polyphonic

PWG - Polyphonic Waveforms Generator based on TDA 1008

Siel cruise

Mono section 

 Basically the the oscillator DCO is pretty simple with just sawtooth / square shape + an octave setting at 4' 8' 16' 32. The monophonic section is partially derived from SIEL MONO Features same 10 presets sounds when set in edit mode (called mode "FREE") it is possible to access direct DCO edit. 

DCO

2 shapes:  sawtooth / square can be edited in free mode

Octave

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

10 presets

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

IC

sound generation is based on DIP-40 M110B1 SGS-Ates like Jen Sx1000, Crumar composer and many FARFISAs from the era like Doria, FK-50, Louvre, Pergamon, Scala...

MONO preset
IC M110B1-IC
SIEL CRUIS MONO IC

ZANZA

POLYPHONIC  section 

up to 49 voices polyphony based on PWG - Polyphonic Waveforms Generator - with 12 X TDA 1008 - 16 pins frequency dividers. The are 4 PWG presets families with minor edit parameters :

BRASS

Instruments:  trombone and trumpet

Controls:  filter cutoff-resonance plus a 2-stages EG attack + crescendo.

STRING

Instruments: violin, cello and percussion

Controls: EG control over attack and decay- this control is shared between reed and piano family

REED

Instruments: accordion, musette, church organ

Controls: 1 EG control for attack segment

PIANO

Instruments: piano, clavinet, honkytonk

Controls: variable decay

TDA1008

Effect

 EFFECT a single effect ANIMATION based on TDA 1022 - according to the original advertising this effect was aimed to recreate acoustic reverberation of a hall concert type, but it sounds more like an analog chorus. 

LFO / EG / FILTER

Filter

FILTER 

Section is slimmed-down from original MONO synthesizer: VCF is no more multimode but only lowpass controlled by 2 sliders for cutoff and resonance up to self-oscillation.

The KTF is a simple key tracker for more brilliance on higher octaves.

LFo

LFO

a single triangular modulator with variable rate /depth and 2 destinations:

- LFO to DCO Pitch

- LFO to VCF filter

Envelope

Envelope

 a single EG type 4 segments ADSR (only for mono section).
Controls for split zone fixed to middle keyboard. 

Cruise synth

Our Verdict 

"Rather basic - but for sure it has a vintage soul and raw sound- pay attention to issues and special IC. Now considered as classic, price is rising above 500€" 

Sound 
quality

Interface

Build
 quality

Rarity

Quality / 
price

Overall

CONS

- unreliable
- limited edit
-  today price is crazy

PROS

-analog
 - fun

Are you a Cruise 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 Cruise related gallery

Cruise audio demo

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 Video demo

SIEL CRUISE SIEL CRUISE
60 out of 100 based on 1 user ratings
300 to 600 from 1 sellers Sellers: