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
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 Vox

Hohner String Vox = ELKA Rhapsody 490

Hohner International sold the ELKA 490 under their label for the international market. The only very obvious difference is the beige colour. The ELKA were black. And the power supply on the Hohner International version is accepting 110 - 240 Volts at 50 or 60 HZ AC cycles

Hohner String Vox label

This one features two sound only:


While the STRINGS are one octave above the other sound, it also sounds like a heavy highpass filtered pulse wave.
The VIOLIO CELLO is a bit lowpass filtered and uses a more buzzy sounding wave shape.

At the right hand of the keyboard you can set:

  • SUSTAIN to change the release duration of the sounds
  • VIOLON CELLO on/off (down = on)
  • STRINGS on/off (down = on)
  • VOLUME (no need to explain)

So, there are not that much possible sound variations available.

On the left of the keyboard there is a power switch. Because on my unit the light of the switch is long gone, someone labeled the switch with the german words "Aus and "Ein". This translates of cause to "Off" and "On".

Hohner String Vox inside

To open the top you just need to undo four screws on the back and 2 under the unit.

Hohner String Vox board inside detail

on the left board in the front you see the top oscillator and the two top octave divider chips (S 52255 and S 52256). These were used often in those days for organs.
The other boards in the front are dividing down (chip SAJ110 by ITT) the pitch of the top octave. Each board is doing it for two notes. These boards also do the filtering and shaping. Note that each board is using slightly different capacitor values. These depends on the pitch and the needed filtering. And if you look real close, you will notice that the very left board is doing one more pitch then the others. The top row of components there is doing the highest note of the 49 notes of the keyboard. So 6 boards with two notes each is 12 notes, the full octave of notes. And each board does 4 pitches per note (+ one additional on the very left board).

Hohner String Vox board inside detail

Here are the other of the six boards in the front

The boards in the back add some ensemble modulation. But not by using a chorus delay line, but some tremolo modulation. And a vibrato patched to the top oscillator.

Hohner String Vox date

The date given on the inside of the left hand side panel tell when the instrument was build on the 16th of July 1974 !
This was a Tuesday if you can't remember it

Because there are not that much information known about the years of manufacture of the ELKa and the Hohner International version, we now know that it was at least build in 1974. Maybe also a year or two longer.

Listen to the ELKA version of it for example on Klaus Schulze's "Bayreuth Return" track from the "Timewind" record recorded on the 3rd June 1975.

Maybe I will add a few sounds ...