How does Ardour determine if a plugin is an instrument?

I have a synth plugin that isn’t listed as an instrument. Where is that info stored?

Ardour 6.2



It is stored in the plugin itself. The category is set by the vendor, and instruments plugin need to be categorized as such (VST’s effFlagsIsSynth, or LV2:InstrumentPlugin).

Alternatively if a plugin has only a single MIDI input, no audio inputs and at least one audio output is listed as instrument in Ardour.

Thanks. I’ll let the author know.