Sidechain input

1

Sorry if this is too obvious, but is there currently support for sidechain inputs? If yes, how it needs to be specified? (for example, what is the right PLUG_CHANNEL_IO pattern to use?).

Thank you in advance,
–Stefanos

2

Hi Stefanos,

It’s not obvious because this is something that is not quite finished yet, and sidechain will not work correctly yet in iPlug2. It’s a high priority to fix it soon.

The idea with PLUG_CHANNEL_IO is that different supported IO bus/channel configurations “IOConfigs” are specified separated by a space token. Inputs and outputs are separated by a hyphen token. Multiple buses are separated by a dot/period token.

  • An FX plug-in that can work on mono-mono or stereo-stereo tracks would have a PLUG_CHANNEL_IO 1-1 2-2

  • An Instrument plugin that has multiple output buses (e.g. drumsynth) might have 0-2 0-2.2 0-2.2.2 indicating it can work with up to three stereo output buses.

  • An FX plug-in with a stereo or mono side-chain input (multiple input buses) could have it set to 1.1-1 2.2-2

There will be a method to tell you the current IOConfig from the plugin’s ProcessBlock() method

Unfortunately this is quite tricky and i’m still working on it.

1 Like
3

Thank you, Oli.
Is there a specific branch that reflects the current work on sidechain inputs? Is there anything I can do the help accelerate that work? Perhaps I could take on some of that work if you think it would be helpful.

Best,
–Stefanos

4

and

is where some of this work is happening. I need to have a look again, I think it will be quite hard for anyone else to jump in on this particular aspect