[RichD]

On Apr 22, "Joel Koltner" wrote:
Claude Shannon estimated music at 40 bits/sec entropy.
What does MP3 achieve?

It's an apples and oranges comparison: Claude there is talking
about how many bits of information the musicians need to
know what to play, but it's assumed they already know how
to proficiently play their instruments as part of an orchestra,

No, he wasn't.
Evidently you don't understand Shannon entropy.

Indeed, about the only thing that MP3 "knows" at all is how the
human ear behaves in terms of masking
behavior, and hence has a pretty good idea as to what of the
"raw audio bits" it takes in can be safely thrown away without
anyone noticing too much.

A better comparison would be with a speech encoder such as Speex:
Speech encoders typically model the physics of the human vocal
tract, and therefore can often get away with upwards of an order of
magnitude less bandwidth
(bits/sec) for a given quality of speech relative to something like MP3.

Then the speech playback decoder generates
sound through a model of the human vocal tract?
Very impressive, if true -

--
Rich