I realize there's already been a trello ticket for quite a while but it doesn't have a description. So, I thought I'd share my thoughts on it.
- Truehd crackles when using spatial audio (example) . But only when using spatial audio. (7.1 using e.g. Dolby Digital Plus is fine either way.)
- 5.1 already sounds mostly excellent (It sounds as if the front channels are played from the ceiling instead of behind the screen. But maybe that's just the limitations of simulating position with stereo speakers?), so all that's really needed is to not play both "side" and "rear" channels from the same positions.
- The overall volume level when using spatial audio is quite a bit lower. At times tough to understand what people are saying, even at max. volume. (I understand that this might be another limitation with the VR environment though and you actually might play at full volume already.)