I touched this issue several times already, but as I just ran into it again: The downmix presets in Mix Convert use a fixed routing, which leads to questionable results in some cases:
Here I try to downmix an AURO 3D signal to planar 5.1. The top-front channels are called “Side” (?!?) and get routed to the rear channels, which leads to completely wrong imaging, for obvious reasons. This routing can’t be changed, I need 3rd party tools for the task - which is cumbersome in case of the Control Room.
Please fix / improve (… and re-introduce the phase reverse button for individual channels, while you’re at it …).