Revisit some old sounds, and make some new ones. A single oscillator, dual filter user oscillator emulating a miniKORG 700 synthesizer for logue-sdk compatible synthesizers.

As always, these are to be used at your own risk!

A quick word...

I've been having a ton of fun creating these plugins, and your support really helps! If you like stuff like this and my other work, by all means feel free to contribute whatever you can to help support this!

Ensure you have the KORG minilogue/prologue sound librarian installed. Now, before you do anything else, perform a full and complete backup of your synthesizer and save this to disk before continuing. See the sound librarian manual for instructions on how to do this if required. Next, select the USER OSCILLATORS tab on the librarian, and drag and drop the requisite file to an available slot in the librarian :

  • for minilogue xd users, please use 1973.mnlgxdunit
  • for prologue users, please use 1973.prlgunit.

The miniKORG 700

The first "real, true" analog synthesizer I ever played, this oscillator attempts to emulate some of the unique features of this synthesizer. The filter in this synthesizer remains one of the most unique filters I have encoutered so far - with both a high pass and low pass "traveler" for adjusting the cutoff.

This user oscillator also emulates some of the "traveler" filter sound as well, note this is an ongoing project and I may improve this as I go.


This user oscillator emulates the miniKORG 700 synthesizer, which features a single oscillator with 5 waveform types, dual "diode ladder style" filters (HP and LP), glide, filter tracking and filter envelopes.

Some features are not emulated, such as the ampltitude envelope following the filter envelope - you have an amplitude envelope already. As well as the "repeater", and the "bender", although you may be able to simulate these features using the more advanced features of your loguesdk compatible synthesizer.


Sets the low pass filter frequency. This is '0' by default, and must be turned on loading the oscillator to start making some noise!



Sets the high-pass filter frequency. If you wish to use a 'bandpass' style filter - e.g by moving both the low pass and high pass filters together, see the parameter "Hp Track"



1 - Triangle : This actually is an integrated pulse, yielding a unique familiar sound

2 - Square : Square wave, just slighty not quite 50% duty cycle

3 - Sawtooth : Does what it says on the tin, same direction as VCOs

4 - Chorus I : Slow PWM, some dwell at each end of PWM

5 - Chorus II : Fast PWM

HP Track:

Sets the amount for the high pass filter to track the low pass filter. Allows bandpass style filter sweeps as if you were adjusting both the HP and LP filter at the same time.


Variable amount of resonance for the HP and LP filters. They do not self-oscillate.

Glide Rate:

Sets the amount of smooth log-style portamento. This is updated at the OSC_CYCLE rate, and currently this results in 3000 updates per second, yielding smooth step-free portamentos. Or is that portamentoes?


Sets the attack time for the filter. Larger values = slower attack. This is a log-style envelope.


Sets the decay time for the filter. Larger values = slower attack. This is a log-style envelope.

This version is built for the 1.1 API, however some users have noted some issues with this possibly not working with their synth or their librarian

Download the zip here (contains both minilogue and prologue formats)

This version is built for the original 1.0 API, and should be compatible with the older and the latest software.

Download the compatible V1 api zip here (contains both minilogue and prologue formats). It is functionally the same as the 1.1 api version