quad panning with mc.mixdown

Hello,

I'm trying to setup a quad pan pot using the mc.mixdown object to handle the circular panning as detailed here. However, there doesn't seem to be an easy way to mix a mono signal across all speakers. OFC it may be possible to do this after mc.mixdown but I'd rather avoid it if possible.

Preliminary approach is outlined in the patch below, but I'd be curious on hearing if anyone has tried using mc.mixdown in this capacity. In the end, I ended up reverting to vbap.