IPlug Sidechain - bus/channelIO question

[red]

Hi there,

Has anyone already used sidechains in their AU/VST plugs with IPlug? I can't figure out how to configure channel_IO to use stereo input/output bus and stereo sidechain to work with AU and VST.
Tried #define PLUG_CHANNEL_IO "4-2" but AUval reported:

Input Scope Bus Configuration:
 Default Bus Count:2
    Format Bus 0: AudioStreamBasicDescription:  2 ch,  44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved
    Format Bus 1: AudioStreamBasicDescription:  2 ch,  44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved

Output Scope Bus Configuration:
 Default Bus Count:1
    Default Format: AudioStreamBasicDescription:  2 ch,  44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved

ERROR: Default Format of unit does not match reported Channel handling capabilities

What am I missing? How can I set the required default format for channel handling?


Thanks in advance and best regards
red

[red]

probably I have written too much.
I am looking for a hint on how sidechains are implemented in wdl, for a small compressor plugin.

Thanks again and best regards
red

[schwa]

Hmm, that should work, in theory. In practice most hosts wouldn't load that plugin because as defined it would *require* 4 input channels. You could try:

#define PLUG_CHANNEL_IO "2-2 4-2"