wiki jconvolver
https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Simple-audio-post-processing
First issue channels of the Sink seem to be wrong. BL and BR should be RL and RR. Second issue is that the supplies config stops at second "center" line channel 14 with channel not avaliable. Same for all channels above 7. So it seems we should define all 14 channels as inputs first??
Dunno if this here is right right place for this, sorry if not