Calling Zebra experts: how do you do this?

[Mr D]

Hi Peoples,

Here's the scenario:

I have two parallel oscillators, each with a filter.

I want to be able to: turn my hardware midi controller knob, so that as one filter closes (A), the other opens (B).

So far so good, i know how to do that.

Here's the tricky part: When (B) filter opens, it isn't quite having the right effect. I want to apply a CURVE to the modulation (filter on B), so that i can exactly tweak how those two filters / oscillators interact.

And remember, i want to do all this by turning ONE midi (hardware) controller knob.

I have the feeling that the answer lies with a ModMapper, but so far i can't quite get my head around how to make it work!

Many thanks in advance!

Mr D

[ere2learn]

edit -

[Erkenfresh]

I got it figured out.

Modulate each filter cutoff by a Modmapper. Right click the graph in the Modmapper(s) and pick Sine (or Cosine) to get a starter curve. For the modulator on those, pick Env2. For Env2, turn the ADR all the way to zero and put the Sustain at halfway.

In the Mod Matrix you can use MidiLearn on the Mod knob and then have it modulate the Env2's Sustain. Alternatively in the XY area, have one of the knob modulate Env2 Sustain and then MidiLearn the knob to your hardware knob.

Adjust limits on those things so you get the correct range on your hardware knob.

It's kludgy but it should work.

[Gone soft]

If your knob can send expression control (CC#11) or breath control (CC#02) or aftertouch and you don't need all of those for other purposes it should be as easy as setting a MMap as source in one slot of the matrix and let that ModMapper be driven by one of those. Just use the dropdown menu for "Modulator" in the ModMapper and select "Breath", "Xpress" or "ATouch". I think the ModMappers mode should be set to "Map Smooth" for your purpose.

[~Pd~]

I got it figured out.

Modulate each filter cutoff by a Modmapper. Right click the graph in the Modmapper(s) and pick Sine (or Cosine) to get a starter curve. For the modulator on those, pick Env2. For Env2, turn the ADR all the way to zero and put the Sustain at halfway.

In the Mod Matrix you can use MidiLearn on the Mod knob and then have it modulate the Env2's Sustain. Alternatively in the XY area, have one of the knob modulate Env2 Sustain and then MidiLearn the knob to your hardware knob.

Adjust limits on those things so you get the correct range on your hardware knob.

It's kludgy but it should work.

Ha, weird, I just saw the exact same technique - manipulated env sustain as a mod source - in a tutorial on Ableton Sampler. Gonna file this one away as a universal kludge in the ol' memory bank.

I think the mod mappers in Zebra 3 should be able to accept any CC as a modulator. Would be nice if they could accept modmixers as a mod source too - though there'd have to be some coding to prevent modulation feedback loops as modmixers accept modmappers as sources.

[Erkenfresh]

I've been spoiled by Hive's "constant" modulation source. Perhaps the same could be added for Zebra?

[3ee]

I've been spoiled by Hive's "constant" modulation source. Perhaps the same could be added for Zebra?

Until is featured, you can make a -constant value- out of a MMix module

[Erkenfresh]

Yeah I thought of that as a potential route, but you can't input MMix into a ModMapper. But otherwise a useful thing to know.