Lord Hasenpfeffer:
Stewart Pinkerton wrote:
In order to 'normalise' to a different average level, you must be
changing something, yes?
Correct. It's called "the amplitude" (and nothing more). This is
important when working with lossy compression schemes which employ, in
part, methods of psychoacoustic filtering designed to remove frequencies
from sound sources which are "too quiet to be heard" by the human ear.

Got an idea to test your psychoacoustic threshold theory..

1. Encode an MP3 from the normalized wave.
2. Encode an MP3 from the original source.
3. Use MP3Gain to do an MP3-native 'scale factor edit' to increase the volume of the quiet MP3
to match that of the normalized MP3 as closely as possible (it'll help if you know exactly how
much you raised the volume of the normalized wave).
4. Compare.

-StArSeEd
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