Scriptnode / Global Mod

[DanH]

I want to modulate the frequencies of 3 filters with a Global Mod LFO in an FX plugin.

I've got the Global Mod node up and running, but I'm already controlling the Frequency knobs with a knob, and I can't connect the cable to the Global Mod node. If I connect it to my 'master' Freq knob the frequencies just sit at 20hz..... Actually, as I'm writing this I'm guessing that the value of the GM signal is like 0-1 or something? Do I need to turn this into the frequency range i.e 20-20k? And if so, how?!

[ulrik]

@DanH I solved it in my project like this:

Amount goes to Max in a minmax module, from minmax modsignal goes to what to control...
and from global_mod to value in minmax

I set this up like this because I want to control the intensity of the modsignal

[DanH]

@ulrik lovely, thank you!

[DanH]

@ulrik ok so how do you control the intensity? Changing the intensity in the Global Mod sets the value of my filters, rather than having the control with my filter knob.... hmmmm. I could link to Filter Freq knob to the Max value of the min/max control like you have done, but that feels a bit hacky

[DanH]

@DanH actually I can't do that because that creates a feedback loop - > crash!

[DanH]

@DanH ok I'm getting confused. Essentially connecting a global mod to the frequency of a filter in scriptnode has a different outcome to using the stock modules. Using the stock modules allows the filter frequency to set the upper limit of the modulation. I.e if your frequency is 1000khz then the GM will modulate 20-1000khz (if intensity is on full / 1 etc).

It's this behaviour that I'm trying to replicate in scriptnode...

I was also hoping that by typing this all out the idea might come to me, but no :face_with_tears_of_joy:

[Matt_SF]

@DanH @ulrik you can do it like this (i used an oscillator but the setup is the same) :

By adjusting the min/max values of the add parameter you can set how far goes the modulation. (And it doesn't crash here if the value goes outside the 20-20k range).

[ulrik]

@Matt_SF that's a nice solution, cleaner than mine, thanks!

[ulrik]

This post is deleted!

[DanH]

@Matt_SF Thanks Matt. I'm trying this but the pma isn't changing the filter frequency.... It's never easy!

[DanH]

@Matt_SF Ok, got it working in a minimal project. The modulation now seems to go the opposite way to the stock modules i.e - the frequency you set is the minimum modulation value as opposed to the maximum modulation value (as before with stocks). So now if you set the Freq at 1k it will modulate 1k - 20k, as opposed to 20hz - 1k....

It's nice tho!

Also, if I bypass the GM I can't control the filter freq any more. Is this the same behaviour you have?

Ah - I can bypass the GM node...

[ulrik]

@DanH said in Scriptnode / Global Mod:

Ah - I can bypass the GM node...

Can you do it from the gui?
How can I bypass any node using gui buttons/knobs?

[DanH]

@ulrik use a soft bypass container and put the node in there. Then use a knob (at the top of the main container), connect to the soft bypass power icon, and script the value to either 0 or 1 in a button callback.

[Matt_SF]

@DanH @ulrik Oh I just realized... I didn't try it with a global modulator, and the mod signal is different than a osc/peak combo.

you can try this graph for upward modulation :
set the global modulator to unipolar and change the range of the pma.add parameter to suit your needs :

And by setting the global lfo to bipolar and setting up the graph like this, so the mod signal will be bipolar (play with the bipolar.Scale parameter`) :

Interestingly as you can see, the global mod amount is set to 0 but the mod signal is still 100%... That's why you'll have to keep the bipolar.Scale parameter to low values to keep the mod signal to a normal range. But it would be fine if the global mod amount was doing its job....

Probably a bug. If you can confirm it also happens to you in your FXs I'll push the issue on GitHub

[Natan]

@DanH said in Scriptnode / Global Mod:

@ulrik use a soft bypass container and put the node in there. Then use a knob (at the top of the main container), connect to the soft bypass power icon, and script the value to either 0 or 1 in a button callback.

Dan, Hey :hand_with_fingers_splayed:
Could you please do a Snippet, Thing are Kinda Strange to me on The New Develop Branch :folded_hands:
Just need the Bypass, and Do connect a random Knob, Like gain.

I Need to use the Knob for both Bypass and Gain control

[ulrik]

@DanH haha easy, I hadn't tried to drag the cable to the icon :) thank you!

[ulrik]

@DanH @Matt_SF @Natan

This an FilterFX controlled with an envelope, I can toggle between clean/envelope (@Natan soft bypassed)
But I can't figure out how to set the modulation intensity on this.

If freq is set to 2000Hz and intensity is 1, I want the mod range to be from 20 - 2000Hz, and if intensity is 0.5 the modulation range should be 2000 - (2000 - 20) x 0.5 right?

How can I do that in this example?

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[DanH]

@Matt_SF ok this is working (I think!). Thanks for taking the time to make this.

Next question! How do I know where to set the scale?

EDIT - Actually the first option doesn't work because if you set the GM intensity to 0 you then can't control the frequency of the filter - it just sits at it's max value (20k).

Also - I think because the pma.add range goes to 0 the filter stops moving at the bottom for a bit when being modulated, as though the range is below the filter range (if that makes sense).

I can confirm the unusual behaviour of the GM in bipolar mode as well - stays at max even if intensity set to 0.

[DanH]

@ulrik At first glance this seems to work well for my use case - I substituted the envelope got the Global Modulator and it seems to behave like I hoped. Perhaps to control the intensity you need something between the minmax node and input_toggle value2?

I'm trying with a pma but without being able to change the pma range to 20-20k it won't work. I don't fully understand it anyway :face_with_tears_of_joy:

EDIT - I can't get the range / skew to sit properly. By controlling the MAX value on the minmax node with the Frequency knob the max value always sits well above the knob's value. So you put the knob at 20hz but the actual frequency you get is 500hz... @Christoph-Hart any chance of a little guidance please?! We're so close!

[Matt_SF]

@ulrik @DanH just add a pma node before the minMax node :

The pma.node helps you dial in a first value, which you can modify with other values. It takes a bit of practice but soon you'll realize you can't live without it :beaming_face_with_smiling_eyes:

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