This effect works best with the resonance cranked up into self oscillation which is where the new resonance knob mod comes into its own. Essentially VCF FM allows you to modulate the filter cutoff at audio frequencies to create all kinds of clanging cross modulation and bizarre alien splatters & sweeps. These consist of a source selection knob and an FM amount knob. Input Level Knob: Its a knob that controls the level of the audio input. If you use the note 'Hold' function and press a key the audio input will be audible and can be processed with the filter etc.
Korg poly 800 module Patch#
The audio input is still effected by the filter envelope.Īn external input can easily be filtered without having to hold down a note by setting up a patch with all the oscillator tones turned off, but the DCO 'level' parameter set to full. when the DEG envelope for the chosen path closes completely at the end of the release phase, the noise gate is activated and the external audio input is cut. The input doesn't respond to the DEG audio level envelopes but instead is gated on and off by the noise gate that korg implemented to silence the synth when all the envelopes are completely closed. The input is set up so that a loud signal will slightly overdrive the filter for a dirty sound.Įxternal Audio Path Switch: This switch sends the audio from the external input either via the DCO1 or DCO2 signal path or turns it off completely. The new filter cutoff control knob is disabled when a jack is plugged into the socket.Įxternal Audio Input: This accepts a line level audio signal and inserts it before the filter and chorus effect so you can use it to process external signals. VCF CV input: This socket round the back of the machine adds an external 0-5v control voltage input that controls the filter cutoff. This mod adds a switch to select either a 24dB or less drastic 12dB filter response Both parameters are still also controlled by the normal programming methods which can set the range of the knobs control.ġ2dB / 24dB Filter Response Switch: Somewhat mysteriously the filter chip used in these machines has both 12dB/Oct and 24dB/Oct outputs but only the 24dB one is actually used. The filter cutoff knob allows you to perform long filter sweeps for those squidgy burbling analogue lines that you knew your Korg was capable of but could never actually program. This can produce the kind of screaming top end and subsonic bass that gives these machines a whole new range of sonic possibilities.
The resonance knob can take the resonance well into self oscillation and far beyond what is programmable from the front panel.
Korg poly 800 module mods#
The mods consist of 3 main sections, Filter mods, FM mods and audio mods.Ĭutoff & Resonance Knobs: This mod can be found around the net under several different names and versions but essentially it adds knob controls for the filter cutoff and resonance parameters for realtime control. On paper the Poly800 was a pretty well endowed machine but in reality it always sounded a little thin and never really fulfilled its potential, which is where we step in with our Polybeast mods! They came from that strange era of Korg synths where they couldn't seem to decide between analogue and digital, and so came up with a selection of hybrid synths that didn't seem to excel as either sound. The Korg Poly800 and its rackmount / tabletop cousin the EX800 are odd beasts. (Installed on your machine by circuitbenders)ĭIY kits are available for these mods HERE
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