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Improved advanced analog Jomox dual membrane circuitry.
Looking at the drumskins of an acoustic drum, you can mostly find two vibrating membranes that modulate and interact with each other by the coupling through pressure waves of the content air.
That produces the typical sound of a drum. Non-linear waves on a two-dimensional membrane which is co-excited from the other. By resonance and counteractive interference new frequency bands and overtones are brought about. Mostly a noise-like signal is added (e.g. snare strainer) that either excites the membranes as adds an own envelope to the resulting sound.
In the Mod.Brane 11 there are two 2-pole filters (F-OSCs) arranged in a way that dampen is like a limited range of resonance. They can interact between each other by two coupling parameters 1_2 coupling and 2_1 coupling. Coupling is a combination of addition (mixing) and frequency modulation. 2_1 coupling acts inversely with negative values and even with positive values. So every possible feedback and interference mode can be produced.
A dual noise generator which provides either white noise or a multitone metallic noise or a mixing of both, combined with a decay envelope, can produce percussion-like and cymbal-like tones which are mixed to the rest of the membrane signal. A part of the signal excites the F-OSCs, and the other part is mixed as a noise envelope to the signal.
Two internal LFOs which control the tuning of both F-OSCs expand the sound spectrum once more.
All analog parameters are either storeable and controllable via Midi. The Midi notes control the pitch of the F-OSCs.
Too, the modules are controllable via CV/Gate and via trigger pads for live drummers. With the trigger input, the threshold and velocity dependend dynamics can be adjusted.
Four routable CV inputs let all internal sound parameters (incl. LFOs and metallic noise) be controlled by CV sequencers. Every CV input provides an own programmable amount which can be negative too (i.e. subtracting the CV value from the internal value). The range reaches from 0..5V.