The room is very small, without acoustics treatments it measures: 5.1, 2.25 and 2.7 meters.
I would need the dimensions of the room itself. Acoustic treatment is not taken into account when calculating room modes, so it's irrelevant here. What matters is the actual hard, solid, rigid, massive surfaces that define the room. That's the dimensions we need.
I've created one front wall of fluffy fiberglass 50 cm deep and a rear wall of rigid rockwool 50 cm deep. Over the mixing position there is a 25 cm deep cloud panel of fluffy fiberglass with 20 cm air gap.
You have sucked the room dry, but they looks of your waterfall plot! There's no life at all in there. It will be uncomfortable and fatiguing to mix in there for long periods of time, and you will very likely exaggerate reverb, delays, and other effects in your mixes, since the room is so dark.
Although the decay in the lower area has improved a lot, I still have a non homogeneous RT60 over the whole spectrum. What can I do in order to achieve a better result?
I would need to see the actual MDAT file. But once again, what's obvious here is that you have over-treated the room, killing everything. You need to get some life back into the room! The decay times are too fast across the entire spectrum, so you'll need to increase them, not decrease them! And you'll have to do that carefully, for each frequency band.
You also have seem to have large problems with SBIR, or something similar, perhaps due to the locations of the speakers and mix position in the room. Please provide details of where you have the speakers, where you have the mix position, what other treatment you have in there, and photos of the room.
- Stuart -
