Solton SM-100
Synthesizer Module (year?)

 

The SM-100 is the module version of Italian polysynth PROJECT 100 minus the internal multitrack sequencer.

SYNTH MODULE Main panel features a basic segment display, 3 knobs and 18 push buttons. The bulky case is non-standard format cannot be rackmounted - design is quite close to model Solton like progammer 24 or Ketron Polyvox (not the russian monosynth).


Rear panel terminal connectors:
- main signal out
- Midi interface
- damper pedalswitch input
- tape interface (for sound storage).

 

TECH the main processor is based on a single 8 bits Intel P8031 which handles up to 6 voices polyphony. Each Project 100 voice is composed by 2 detunable digitally controller oscillators DCO1 + DCO2 located on 6 voice boards.

 

OSCILLATORS DCO1 and DCO 2 are nearly identical:

DCO1 DCO2 shapes (summable) square / sawtooth / wide pulse / pulse same as DCO1 pulse width yes same as DCO1 octaves 16' / 8 ' / 4' same as DCO1 Hear the DCO waveforms Hear the DCO pulse width Hear the DCO detune

FILTER a lowpass 4 poles resonant filter based on 6 X SSM 2045 IC with fixed keytracking option.

Hear filter cutoff and resonance

ENVELOPE up to 2 EGs per voice based on 12 X SSM 2056 IC.

- EG1 AMP 4-segments ADSR - EG2 VCF 4-segments ADSR Hear ADSR slow attack

LFO a single delayed modulator (2 shapes: sine or square) with variable amount depth and speed frequency. Up to 3 possible summable destinations sharing same frequency amount:

- LFO DCO pitch - Hear the DCO LFO - LFO VCF cutoff - Hear the VCF LFO - LFO VCA level - Hear the DCO VCA

 

 

EFFECT analog chorus based on a 3 line BBD TDA 1022P.

Hear the TDA chorus

 

MIDI in edit mode it is possible to edit all parameters USER-patches using CONTROL CHANGE.
The list is printed on the machine and it is not very standard - this is indeed a very nice feature, sadly, the Midi buffer quickly chokes thus freezing the whole system.

 

MEMORY:

- 60 ROM preset (LIST) - 40 USER-free presets Battery replacement: 3.6 V Ni.cad battery can spill acid over circuits. Change it now.. run run... Click to magnify board battery

EDITOR SM100 can be edited using a freeware program SM100 editor

 

RELATED FAMILY:

SOLTON PROJECT 100 61 keys versions, same specs as SM100 but an extra internal polpyphony sequencer.

 

GALLERY:

original advert	pic at CATSYNTH