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Really pissed now so I keep it short. Over 200 of our presets failed verification with 9.30. Just measured SB2 with peak detection for now but attack curves are off somehow, release is fine though.
I heard a major sound change first with beta 27 which does make sense: It's probably the change of RMS size behaviour where you screwed up the peak detection as a side effect. (I tested the RRD switch already but it doesn't change anything.) So back to 9.23.
I think I found out what has happened.
First, as far as I can see, Peak is not broken. If I load settings in 9.23 and then go to 9.30, I get the same behavior. No changes at all. (The other way around CAN be different though!).
But the RMS size behavior for RMS based compressors is indeed different. I thought at first that it was aways better, and it probably still is, but the levels vary too much to just update without changes...
Main issue was that the RMS size of the Auto EQ was set to a default value (20 ms), while it was 0 before. For some tracks this could lead to upto 4 dB of difference in levels coming out of Auto EQ. Set it to 0 to get the old behavior back; I'm releasing a new version tomorrow that does this automatically when loading an old preset.
Beside that there are 2 other things that are different between 9.23 and 9.30:
- RMS behavior fix. In all tests that we did this was an improvement of the audio.
- RMS overreaction caused by bass fix. This was a real bug that could cause compressors to drop down without a good reason (almost randomly) when using large RMS sizes - introduced in 9.23.
This does mean that the output will be different for 9.23 and 9.30. But, except for the Auto EQ issue, the difference should only be improvments.