Quote:
I think there is more bigger problem for MB bands.
Using peek or RMS mode with FF makes Bands very hard to adjust to sound good / to keep spectrum.. etc.. but you get almost full "leveling" (read compression) if thresh and ratio is adjusted properly.
However, FB works way better but you lose some "leveling" with softer input from AGC (because of normal nature of feedback. So what's needed is, FB to act like FF - some 'double" releasing to fix that bad side of FB but to not lose linearity!
Currently with FB, to have most constant output with very different audio input, relays directly from AGC, and AGC is not so smart/fast to do that even though i tried several times to optimize 1-band AGC with SC EQ.
I think it's now better to use just one band for AGC with CS especially if I know that crossover between 2nd and 3rd band is super steep. Cutting bass in 2 bands mode makes things better (bass control), but in other hand worse (steep cut at 250Hz).
So maybe AGC just need better crossover between b1 and b2.
Let's see. What's the problem with FF for audio? Is it that you need to keep the bands wide (non-steep slopes, to avoid changing the spectrum) and then you get pumping? If so, the solution might be to use a side chain on the multiband compressor. One that reduces the amount of bass, mainly. And then you need to adjust the thresholds of the bands to match the new behavior. This would in fact also enable the use of RMS mode instead of peak mode.Using peek or RMS mode with FF makes Bands very hard to adjust to sound good / to keep spectrum.. etc.. but you get almost full "leveling" (read compression) if thresh and ratio is adjusted properly.
However, FB works way better but you lose some "leveling" with softer input from AGC (because of normal nature of feedback. So what's needed is, FB to act like FF - some 'double" releasing to fix that bad side of FB but to not lose linearity!
Currently with FB, to have most constant output with very different audio input, relays directly from AGC, and AGC is not so smart/fast to do that even though i tried several times to optimize 1-band AGC with SC EQ.
I think it's now better to use just one band for AGC with CS especially if I know that crossover between 2nd and 3rd band is super steep. Cutting bass in 2 bands mode makes things better (bass control), but in other hand worse (steep cut at 250Hz).
So maybe AGC just need better crossover between b1 and b2.
But actually, the MB is *NOT* intended as a filter that adjusts the level - that's what the AGC should do; the MB also does something but it should only have a mild effect on the level.
FB which acts like FF will sound like FF - so that's not a solution! The attack and release behavior might be (very!) slightly different but the spectrum changes you mentioned would not be fixed at all, and neither would things like pumping.
If levelling is not good, the problem should be searched in the AGC, not in MB.
UNLESS....... Unless I use a compressor ratio like in the old compressor, where when the input level increases the ratio increases as well. Something like what's displayed in this image - the "Bad Knee" from a whole lot of beta's ago:
Or some other smart behavior, such as a sliding feedback/feedforward behavior based on the input level. But if spectral content is an issue this could lead to Omnia 6 like effects. Will think more tomorrow...
