i’m working on a DSP project in HISE and I’ve run into a problem I’d like to ask your help with.

I have created a SNEX node (dsp_disto) in a “SNEX Shaper” block, with an internal parameter (knob) inside the SNEX node that works correctly — when I turn that knob, the distortion effect responds as intended.
However, I also created a GUI knob in script_fx1 (knob ID = “1”) and wired it to the SNEX node’s parameter (knob ID = “0”). The wiring shows up correctly in the connection graph, but when I turn the script-FX knob the effect does not respond — the SNEX knob works, but the external GUI knob does not trigger the processing change.

I suspect the issue might be how the SNEX node is receiving the parameter from the external knob (perhaps through setParameter<0>(…) or other template method). I looked through the HISE forums (for example “Linking parameters to SNEX” discussion) and I saw there are subtle requirements for correctly binding external parameters to SNEX.

Would you be willing to take a look at the relevant parts of my SNEX code and wiring and perhaps point out what I might be missing? I can provide the SNEX code, screenshots of the wiring in HISE, and any additional details. I greatly appreciate any hints or suggestions you might have.

Many thanks in advance for your time and help — it would mean a lot.

SNEX CODE :

template struct dsp_disto
{
SNEX_NODE(dsp_disto);

float parameter0 = 0.0f;      
float smoothedValue = 0.0f;  

float getSample(float input)
{
    float drive = 1.0f + parameter0 * 19.0f;
    float x = input * drive;
    float y = Math.tanh(x);
    return y;
}


template <int P> void setParameter(double v)
{
    if (P == 0)
        parameter0 = (float)v;
}

template <typename T> void process(T& data)
{

    smoothedValue += (parameter0 - smoothedValue) * 0.01f;

    for (auto ch : data)
    {
        for (auto& s : data.toChannelData(ch))
            s = getSample(s);
    }
}

template <typename T> void processFrame(T& data)
{
    smoothedValue += (parameter0 - smoothedValue) * 0.01f;

    for (auto& s : data)
        s = getSample(s);
}

void reset() {}
void prepare(PrepareSpecs ps) {}
void setExternalData(const ExternalData& d, int index) {}

};