Quote:
Originally Posted by kolamorx
I know it, that's not what I meant.
Let me put it this way: if I set the maximum gain factor to too high value for a certain movie, sounds like breathing could have too high volume and that's a problem.
On the other hand, if I set the maximum gain factor to too low value for a certain movie, the dialogue volume could be too low comparing to the sound effects and music volume and that's a problem too.
Am I right?
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Nope, not really.
The DynamicAudioNormalizer will
amplify each part of the file, which is
quieter than the target volume, so that it is brought
up to the target volume. Also it will
attenuate each part of the file, which is
louder than the target volume (if any such part exists), so that it is brought
down to the target volume. In the end, all parts of the file will have "equal" volume. Of course, that all combined with
Gaussian smoothing in order to avoid fast fluctuation of the gain factors.
Now, what the "maximum gain factor" option really does: It imposes an
additional limit on how much a "quiet" frame
may be amplified in order to reach the desired target volume. The default "maximum gain factor" value, which is
10.0×, should be enough for most needs. But it can, of course, be increased, if it should really be needed. Anyhow, probably the vast majority of your frames (if not all of them!) will
not need more amplification than what the default "maximum gain factor" value allows. And again: This is only an upper
limit,
not the actual amount of gain that will be applied! The actual gain factor will be determined
dynamically for each frame, and it probably will be way lower than the limit in most cases!
The "maximum gain factor" limit exists primarily in order to
avoid humongous amplification factors in
extremely quiet (almost silent) sections of the file. If there was
no such limit, it could easily result in
excessive amplification factors in those
extremely quiet sections – which you do
not want. If we'd amplify
extremely quiet (almost silent) sections by such an
excessive amount, the result will sound very "noisy", because the quantization noise becomes audible...
(I suggest you let DynamicAudioNormalizer write a log file and inspect that log file in DynamicAudioNormalizer GUI, which will easily show whether you run into the limit or not)