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Solton TS4K / TS4




Solton TS4k
Solton TS4 rack

info info Country: Italy / Germany
Weight: 8 kg (keyboard)
Dimensions: n/a
audio demo trend price : 150€
manual comments

Solton TS4K & TS4
Arranger by Ketron Lab (1989)


Simple arranger with digital PCM drums and some analog sections like bass especially designed for real-time arranger performance.

The ts4k is the keyboard version and TS4 is a 2 units rackmount version, project derived from previous model Programmer 24.


bass brillance

info KEYBOARD 49 velocity keys. Main panel features a 16 x 2 LCD display, 48 buttons and 13 sliders for mixing parts control. Quite oddly the pitchbender is located on top left.

Back panel terminal connectors:
- Midi interface
- headphones + main analog out + bass individual out
- 7 outs for drum section
- 2 custom connectors for pedal controls (bass foot controller +volume)
- 2 pedalswitch inputs for start/stop and fill-in PIC (from ebay)

ac Power supply is a custom model PSU with AC-AC weird pinout!

edit VOICE machine based on a 8031 INTEL 8-bits CPU.
The machine is organized into 3 melodic parts + 1 drum one:

8031 INTEL 8-bits CPU. - monophonic bass

- chord 1 melody

- chord 2 melody

- PCM drums (8-12? bits sounds on EPROM).

edit -> TO EBAY SELLERS: stop copying my text at random in your F## auction! Thanks!


the polyphonic section is technically interesting based on a SGS Thompson M114S IC digital "sound tone generator" which read data off an eprom. This chip is used for the so-called "crosswaves" also implemented on other more famous machines e.g Amstrad Fidelity CKX1000, Keytek CTS-2000/1000.

8031 INTEL 8-bits CPU. LEFT - SGS Thompson M114S IC -



edit SOUND sections description:

- BASS is monophonic and features 16 different presets e.g slap, picked, sixties, fingered. Not much else but BASS BRILLANCE which is a kind of filter EQ.

- CHORD 1 there are 32 patches e.g strings, EP, grand piano, fiddle, organ, choir, brass, pads... You can filter it with CHORD BRILLANCE function

- CHORD 2 another wave of 32 patches: marimba, piano, funky, mellow, clarinet, flute, harmonica, guitar, bell ...

- DRUMS 7 channels with individual gain and outs for a total of 43 percussions sounds samples.Some drum functions like ROLL and FLAME. Drums includes: kick, snare, Hihat, ride, tambourine, toms, shaker-maracas.

edit ARRANGER classic fingered playing with styles and auto-accompaniment but also recording with quantizes from 4 to 96 resolution and variable time signature.
There are several preset functions for live play:


- auto bass
- custom arranger
- patch change
- manual drums (triggers with notes)
- odd bass 16/8 feet
- tempo change
- memory save
- custom variation
- intro fill in-end.
edit TIP machine can be slaved to external MIDI clock.


edit EFFECT there is a chorus board based on TDA lines

TDA chorus

MIDI each section is assignable to a different channel.
Midi Sysex dump enabled.

edit MEMORY:


- 32 style (tango, waltz, twist, rock, slow, beguine, mambo, disco, beat, foxtrot, march, polka ...)

- 32 slot RAM, 64 extra slots can be added using custom RAM cartridge.

edit SPOT THE CHIP t Did you say cannibalisation? The analog section with some interesting chips including:

TS4 circuit

- dual VCA CEM 3360 amplifier (used in some PPG, Crumar Spirit, Ensoniq ESQ-1, Linn drum and even holy grail Synton Syrinx).

-SSM-2300 as multiplexer sample and hold same found on the Ensoniq SQ-80.

- Bunch of useful eprom




SOLTON TS3 : another accompaniment rack mount unit, should be really close to TS4 series. Not much info about it.

THE TS3K is the module rackmount version



Company: Solton
Model: TS4 / TS4K
Dates: 1989
Display: 16 x 2 LCD
Synthesis: hybrid
Resolution: 16 bits
ROM size: ?
Polyphony: ?
Multitimbric: 4 parts
Filter: lowpass
LFO: none
Envelope: 3 EGs
Memory: 100 slots
Midi: IN / OUT / THRU
CPU: 8031
IC: M114S IC



demo NONE

If you have some sounds, demo for this section please drop me a line thanks

TS4/ TS4K manual
(italian) provided by
Nardino Lombardi



edit Sample SHOP
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Solton TS4K / TS4 FOR SALE

Solton TS4K / TS4 FOR SALE





motherboard PCB wavetable



REVIEW: "well, if you're in old cheesy arranged with no edit, then... that's the machine for you! Be sure to get the proper original external PSU"

manual manual
-bass is nice - not really editable
-some good IC


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all snapshots*, sounds, texts copyright Polynominal.com / Eric Pochesci
* accessories pedal picture from EBAY auction polynominal.com is not associated or affiliated with Solton in any manner.

Solton TS4K / TS4Solton TS4K / TS4
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