| br>UPDATE : We uploaded all the files needed for the build of HI-Fusion
HI-FUSION is a remake of the classic Polyfusion from the 70s with some improvements.
It is a low pass OTA VCF based on the well known LM13700 ic.
We chose to make this circuit because it's v/oct stable, and the trimmers allow to calibrate it properly.
It has a switch for 2 pole and 4 pole configuration, each with it's own character and timbre.
This design produces nice sounding filter fm results.
For the audio demos we used two oscillators slightly detuned as the sound source.
Output with switch in 4Pole position.
Output with switch in 2Pole position.
VCO inserted in FREQ CV input.
LPfet through VCA. ADSR to VCA and another ADSR for LPfet.
There are 2 type of kits available :
KIT1 : 20EUR (2PCBs+FrontPanel)
KIT2 : 35EUR (Pcbs+FP, 4x2N5457, 5xminijacks, 1x50KA POT, 3X50KB POTS, 2xboard connectors, 4xCream Knobs)
COMPLETE MODULE : 90eur