Vibe Coding Log – Sharing Journey – Adding Modulations – Factory Design (in: DSP and Plugin Devel…)

How to add a modulation parameter.

Yes—you can add these yourself once you understand the chain. A modulation destination is not merely a menu entry. It needs a complete path from the knob to the sound engine.

Using OSC Master A → Vital → Filter Spread as the example:

1. The actual saved parameter

In PluginProcessor.cpp, the knob has an APVTS parameter:

apvts.createAndAddParameter (std::make_unique<Param> (
id + “VitalFilterSpread”,
“Osc Master ” + slot + ” Vital Filter…

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