Lord Hasenpfeffer wrote:

Arny Krueger wrote:
"Stewart Pinkerton" wrote in message



Which part of 'no effect on masking' did you fail to understand? The
threshold of hearing is dependent on sound levels, not on closeness to
0dB FS on the CD, IOW just crank up the amplifier a little.

Point of order...

The threshold of hearing as usually given *is* a sound level, and therefore
can't possibly be dependent on a sound level.

To clarify:

An ATH chart shows that frequency Y is "inaudible" below amplitude X.

In a given WAV, frequency Y's amplitude is X-2dB, therefore, frequency Y
is discarded and does not become a part of the final MP3.

However, after "normalizing" the WAV by a factor of +3dB, frequency Y's
amplitude now becomes X+1dB, therefore, frequency Y is retained and
becomes a part of the final MP3.

Have you checked with the Lame developers to see if this is
how the ATH is applied or if it is applied after the block
is normalized internally?


Bob
--

"Things should be described as simply as possible, but no
simpler."

A. Einstein