🚀 go-pugleaf

Kit-pui Wong wrote in message <77bvje$q3o$3@justice.csc.cuhk.edu.hk>...
>ATRAC (for MD) and MP3 are both irreversible data "compression"
>algorithms.
>Which one loses more data during "compression" ?

MP3 as typically used does about 12:1 compression, but you have some control
over this. With good compression programs, this can be cut to 6:1 with a
parameter.

>Which one gives worse audio result, theoretically and/or practically ??

This is controversial, but MP3, representing later technology and typlically
using more processing power to code, is considered by many to be more
accurate, in its best implementations.

One problem with MP3 is that people judge it based on files they download from
pirate web sites that are illegally distributing copyrighted music. How these
files are made varies all over the map. Some are obviously taken off FM
radios, others are taken off vinyl (ticks and pops), and many are from CD's
that are converted to analog and then back to digital, or digitally processed
under less-than-optimal conditions.

Some programs that are used to compress MP3 files have known and readily
measurable technical problems, like frequency response aberrations in the
10-12 kHz range, which is readily audible. As a rule, MP3 files have little or
no content above 15 or 17 kHz, but this is a less severe problem, audbily.