Best practice for stepped frequency parameters in SVF EQ

[the red_1]

Hello everyone,

I’m trying to create a stepped frequency knob (like SSL / API EQs) for an SVF EQ in HISE.

What I want:

• A knob that jumps between fixed frequencies only

• For example : 3k → 5k → 7k → 9k → 11k → 14k → 16k Hz

• No intermediate values

• Works with SVF EQ frequency parameter

What I tried:

• Limiting the knob range and stepSize
• Linking via plugin parameters

My questions:

• Is DSP Network (CableTable / Table) the intended solution ?

• Is there a native way to do stepped parameters for EQ frequency ?

  Thanks in advance!

[dannytaurus]

@the-red_1 You could use an array of the values and a stepped knob in the UI.

const EQ = Synth.getEffect("Script FX1");
const knb = Content.getComponent("knbEQFreq");
const freqSteps = [3000, 5000, 7000, 9000, 11000, 14000, 16000];

inline function onKnbEQFreqControl(component, value)
{
    local index = Math.range(value, 0, freqSteps.length - 1);
    EQ.setAttribute(EQ.Frequency, freqSteps[index]);
}
knb.setControlCallback(onKnbEQFreqControl);

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[the red_1]

@dannytaurus

Thanks for the suggestion!

Just to clarify though:
Synth.getEffect() doesn’t seem to be available in my HISE version / scripting context.

Using:

const EQ = Synth.getEffect("Script FX1");

results in:
Unknown function 'getEffect'

So while the stepped array + UI knob idea makes sense conceptually, the example as written doesn’t run here.

From what I understand, effects can’t be accessed directly via Synth.getEffect()

Please let me know if I’m missing something or if there’s an updated / supported way to reference FX modules.

Thanks again!

[dannytaurus]

@the-red_1 Do you have a Script FX module called "Script FX1" in your module tree?

What version of HISE are you running? Go to HISE > Help > About HISE and tell us the git commit hash shown, like this image:

[the red_1]

@dannytaurus
i have 4.1.0

[Chazrox]

Check your callback function.

Your knob is

'knb' but your callback function is saying KnbEQFreq.