MATRIXSYNTH: A Tale of Two Filters: Intellijel Polaris & Omsonic RNF

Saturday, December 09, 2017

A Tale of Two Filters: Intellijel Polaris & Omsonic RNF


Published on Dec 9, 2017 ngarjuna

"A Tale Of Two Filters
Two Cascaded OTA filters in the Eurorack format compared side by side in Low Pass mode:
Intellijel Polaris
and
Omsonic RNF

00:00 - 02:02 Open sweeps, high resonance
02:02 - 04:05 Rhythmic pattern sweeps, very wet
04:05 - 06:08 Pattern
06:08 - 08:11 Pattern +1 Oct

Patch Notes:
Audio Damage Sequencer One driving
single sawtooth from Intellijel Rubicon
Into each VCF both enveloped by Maths SUM (ch1 ACC ch4 GATE)
and modulated by AD SeqOne LFO (SIN & SAW @ 256 steps)
4-pole out to uVCA enveloped by Dual ADSR

Open sweeps are the same patch with the gates silent and the VCA bias cranked up

No effects

As each module features on-board attenuators for everything I did my best to match scaling and offset between the two filters. I also spent some time comparing input drive (COTA filters seem to be very sensitive to input levels).

On the open sweeps I was unable to get the resonance on the Omsonic to the full screech I wanted so I feedback patched some of the 2-pole into Input B and seasoned to taste"

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