Polyphonic Synthesizer:

Kawai SX-210
Modulus 002
Waldorf Blofeld
Waldorf rackAttack
Waldorf Wave
Waldorf XTk30
Wersi Stage Performer

Monophonic Synthesizer:

Casio VL-1 Tone
Dübreq Stylophone
Korg M500 MicroPreset
Modulus monoWave
Moog miniMoog
Moog Minitaur
Moog Prodigy
Moog Sub Phatty
Moog Taurus III
Moog Voyager
Synthesizers.com Modular
VacoLoco Zira
Waldorf Pulse
Waldorf Pulse 2

String Machines:

Crumar Performer
ELKA Rhapsody 610
Eminent 310 theatre
Hohner String Performer
Hohner String Vox
Logan String Melody
Waldorf Streichfett

Other Keyboards:

Manikin Memotron


Behringer Mixer MX2642A
Behringer Mixer MX8000
Behringer Rack Mixer RX1602
Boss DR-220E
Digital Raagini
EEH DS 500
Electro-Harmonix Small Stone
Georg Mahr Midi-Ratsche
Ibanez Digital Delay DM1000
IBK 10 Control
Lexicon Model 200 reverb
Mode Machines Krautrock Phaser
Moogerfooger Ring Modulator 102
Moogerfooger 12-Stage Phaser 103
Moogerfooger Analog Delay 104Z
Moog MP201
Schrittmacher's Inside
Schulte Compact Phaser
Simmons SDS-V (w/o drum pads)
Synthoma Élkorus
VacoLoco Tron
Waldorf 4Pole
Waldorf EQ27
Wersi Voice (BBD FX)
Waldorf midiBay
Waldorf Becher/Mugs


Access MicroWave controller
Alesis Andromeda A6
ARP Quartet
EES Midi CV7
Crumar Multiman S
ELKA Solist 505
ELKA x705
Emu Emax II
Farfisa Soundmaker
Farfisa Syntorchestra
Hohner ADAM
Jen SX1000
Keio Mini Pops 3
Korg PE1000 (Poly Ensemble)
Korg PE2000 (Poly Ensemble S)
Moog Satellite
Oberheim Matrix 6
PPG waves
PPG wave 2.3 (V8.3)
Rhythm Ace 2l
Roland TR 606
Roland M-VS1
SCI model 700
Seiko DS 202+310
Sound-Art Chameleon
Technosaurus Cyclodon
Vermona Piano-Strings
Waldorf microQ keyboard
Waldorf Q
Waldorf XT30
Waldorf Gekko Chords
Waldorf Gekko Arp
Waldorf microWave
Waldorf waveSlave
Wersi Baß Synth
Wersi String Orchestra


EM Portal Forum


K. Schulze's "Sense"


© Till Kopper

Hohner String Performer

(for sale for local pick-up in Tübingen/Germany. See video below for contact problems on push-buttons)

This german early eighties string keyboard was one of the last variations on building a string ensemble keyboard with or without some extras added.

This one features:


as full polyphonic sound sources. Addtionally a bass sound can be activated for the lower two octaves. The keyboard is split in two plus three octaves. And each half can get a unique combinations of the above named sounds.

At the right hand of the keyboard you can switch on one of the five avialble monophonic synth sound presets:

  • BASS
  • OCTAVE (transposes all the sounds named before one octave down)

Don't expect too much. These are very simple synth sounds and each and every synth today could make much better ones. The character of these sounds is very boring and is missing something special.

contact problems on my machine

hohner String Performer opened

To open the top you just need to unsrew 3 screws on the top.
You see the two leather handeles left and right the keys?
You need them to lift off the keyboard with all electrinics after you undid the 4 screws on the bottom plate of the instrument.

Hohner String Performer opened

Here you see the main frame lidted off the lower instruments housing.
This way you can get to all parts very easy.

Hohner String Performer opened

The bottom side of the frame with 12 brown PCB board for the filtering of each sounds. Each board covering one note of a scale in five octaves. There are little differences in the values of the capacitors on each board.

Hohner String Performer Main Osc

Here you see the solo synth steering and one of those brown boards.

Hohner String Performer under the keys

This is hidden under the keyboard action:
The top oscillator, the top octave divider ("S50240") and the octave dividers ("4024 7-stage binary counter", and "4011 1 Quad 2-Input NAND Buffered B Series Gate").
The discrete main oscillator is feed into a S50240 chip ("13-Note Top Octave Synthesizer IC 50% Duty Cycle Output", "... draw considerably less current, ran cool and needed only a single positive voltage supply") to divide down the main oscillator to the 12 notes of the top octave.

Hohner String Performer FX

This is the FX section with the three transistor bucket brigade delays.
This gives the ensemble FX that is used on most string keyboards.
But here it is using a bit newer chips, the TDA1022, then the famous TCA350 one found in all those italian string machines.

Hohner String Performer Synth PCB

And finally the single board of the monophonic synth.
The coloured trimmers are variable capacitors. They might ajust the filter presets of each synth preset sound.
The synth is very pitch stable btw. But you may have to adjust the course pitch with the trimmer pot on the left. The right hand trimmer adjusts the vibrato frequency.

The volume of the mono synth section is usually way higher then the rest of the keyboard.

In the back there are the following sockets (left to right):

  • GENERAL out (= main out)
  • BASS out
  • STRINGS out
  • PIANO/CLAVINET/ SOLO (= mono synth) out
  • FOOTSWELL pedal in
  • MAINS in (the 110V versions appear to have an external power supply)
The ON/OFF switch is next to the mains in.