@David-Healey Well this is new to me so not very clear yet.
But the old trick was to add more channels in the the routing matrix and route them the way you want.
Now on top of this there are extra proc:
HISE_NUM_FX_PLUGIN_CHANNELS=4 which is the normal num channel + the sidechain channels
And
HISE_SIDECHAIN_CHANNEL_LAYOUT=1 which I didn't know about until tonight...
I'll try tomorrow to actually export a test plugin and see how it goes...

