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

Korg Polyphonic Ensemble 1000 this is ex-gear / sold

Korg PE 1000 K4

Often also named Poly Ensemble or K-4 was build from 1976 to 1979/80 it is often mistaken as being little brother version of the Korg PE-2000. But this is not like this! The parameters available, the technic inside and of cause the sound are very different

Its main feature compared to nowadays keyboards is its full polyphonic structure. That is, each and every key will make a sound at the same time (if needed). No voice stealing on long release time notes.

It is build like so many keyboards of this time in a suitcase like box with a detachable lid. Nice for live gigs. In this case with red velvet inside cover you find two very hand build in garages. One for the non detachable power cord, the other for the included pedal and the DIN cable to connecting the pedal to the instrument. This pedal changes the brightness of the sound. It maybe bypassed to the set panel setting by the foot switch on the pedal.
It got the following sections on the pront panel:

  • Master
    • Master volume
    • Instrument tune
  • Filter (not per key but as master "FX" changing the overall sound)
    • 2 Traveller filter sliders (as seen on so many vintage Korg synths)
    • Peak H (highpass filter resonsonance)
    • Peak L (highpass filter resonsonance)
    • Soft (adjusting the sound colour)
    • Expand (adjusting the envelope modulation to the filter)
  • Evelope and Waveshape
    • Attack (with an off-switch in fully counter-clockwise position)
    • Decay
    • Sustain (acting as release)
    • Waveshape selector rotary switch named "Mode":
      • narrow pulsewave
      • pulsewave
      • squarewave
      • sawtoothwave
      • chorus wave
  • Preset Selction
    • String
    • Pipe Organ
    • Brass
    • Piano
    • Electric Piano
    • Harpsichord
    • Clavichord
    • Control (sets the controlls of the Envelope and "Mode" switch to active)
  • Octave Coupler
    • big knob to mix in a copy of the sound one octave below. Will give a detuning of two oscillators depending on the "Pitch Expand" knob in the next section.
  • Pitch
    • Vibrato Depth (obvious)
    • Vibrato Speed (obvious)
    • Glide (actully adds an upward or downward pitchbending. The 12 o'clock setting is no pitch bending.
    • Pitch Expands (changes the tunning linearity, so that the pitch on the higher keyboard end is a bit to too much to high, and the lower endof the keyboard to low. Together with the Octave Coupler this is were you get the ensemble sound from.

Korg PE 1000 opened

Undo the 2 screws on each side of the panel and you can have a peek inside
The traveller filter is the one on the left. The preset switch with it preset controll voltages is in the middle. The metal board on the right is the back of the sockets and the mains in cable. And finally the power transformer in in the bottom to the right

Korg PE 1000 opened under keys

And if you remove the 4 screws on the bottom, you can then lift up the keyboard action to see the 5 voiceboards inside. Each voiceboard for one octave of keys.

Korg PE 1000 voiceboards

The 5 voiceboards contain an oscillator per key. It got an labeled trimmers (on the left) to adjust the pitch of each key. Each of the twelve notes of a scale got here a single filter and VCA. The parts of the filter and the wave shape former are varying for each key. The little chip appears to be an µPC324C (low power quad operational amplifier).

Compared to the tripple top-octave voice generation of the Korg PE2000 (Poly Ensemble S), this is technically very differnt !

Sound example

Have a listen:

[download here] (10.1 MB, 5:32 of mono mp3 256 kb/sec)

Sound used in the order you hear them:

  • Control 0:00
  • Strings 2:26
  • Pipe Organ (well ...) 3:08
  • Brass 3:38
  • Electric Piano 4:04
  • Piano 4:26
  • Harpsicord 5:01
  • Clavicord 5:13