ConstInsert a processor into the active chain with its default settings.
Apply a preset by index (number) or name (string).
List every installed DSP processor.
Read the active DSP chain and which preset, if any, it currently corresponds to.
List the DSP presets stored in the profile and which one is selected.
Move one entry of the active chain to another position, keeping its settings.
Remove one entry from the active chain by index.
Replace the whole chain. Only guid is sent for each entry, since the host refuses
any other key; the rows getChain reports can therefore be passed back as they are.
dsp— DSP chain / preset namespace.