JC123 - I think you have been mislead, as
your statements regarding audio codecs don't
quite add up.
A WAV file is 1411kbps, or aproximately
10MB/min. A four minute song being 40MB, and
so on. Now WMA and MP3 and MP3Pro are
GENERALLY encoded at 128kbps. This means
that they are all going to be about 4MB for
a 4 minute song. Now obviously you can
encode at higher bitrates, but the average
bitrate found on P2P networks is 128kbps
because it is a general consensus that it is
a "fair middle ground between file size and
quality". I personally encode VBR (Variable
BitRate) and they average a bit over
224kbps, so it is of higher quality, but I
rarely download music and am generally just
backing up CDs and I'm aiming for quality.
Now, here is where it gets different.
According to many people (not all, I don't
even know about majority), MP3 Pro can have
half the bitrate of an MP3 and maintain the
same quality. So a 64kbps MP3 Pro file is
equivalent to a 128kbps MP3 file. WMA claims
the same ability as MP3 pro to have twice
the quality as MP3, however this is a matter
of opinion and is widely argued.
NOW, here is something VERY important. MP3
is a specific standard, a part of the MPEG
video/audio standard. It is the third layer
of the MPEG standard, thus titled MPeg layer
3. WMA stands for Windows Media Audio, which
like WMV - Windows Media Video, exists in a
bunch of versions, WMA 7,8,9 etc. so with
each revision of the WMA codec
(coder/decoder), there are changes.
I am not entirely sure how MP3 Pro is
designed, but for all intents and purposes
its about the same as WMA (upon reading up
on mp3pro standard a bit, I found the
following out: while MP3 cuts sound
frequency off, at a lower and lower frequncy
as the bitrate drops, MP3Pro uses an
algorith to GENERATE the dropped portion of
the file, thus creating a synthesized
reproduction, which MAY sound good, but it
is NOT the same as the original file by any
means. Its a matter of debate whether it is
better to have a simulated high frequency or
none at all, but after 128kbps the
frequencies reproduced are included in the
encode on both MP3 and MP3 pro so unless you
are encoding at 64kbps, its irrelevant)
WMA is fully capable of running 5.1,6.1,7.1,
etc. sound schemes, its a matter of how the
file is encoded. With the proper player, MP3
COULD do the same thing, however since MP3
is a STANDARD it will NOT change, and is
thus the only stable of the three. Which
makes it the best for archival purposes,
nobody wants to have 400,000 files, ten of
which are in a version of a codec, so you
end up with 40,000 different codec revisions
in your archive.
Additionally, the need to have 5 speakers is
very limited as CDs which most people rip
from are in stereo (2 channels, Left and
Right). The change here would be with the
advent of DVD audio which is (I believe)
supposed to have 5.1.
Another thing you fail to mention is the
following:
WMA - Microsoft Corporation
MP3 - Open standard
MP3 Pro - Coding Technologies (
http://www.codingtechnologies.com )
This makes MP3 the obvious choice since
nobody stands to make MONEY from the codec,
however another open standard OPEN SOURCE
codec that is showing a LOT of promise is
Ogg Vorbis. (
http://www.vorbis.com/ )
Hope this helps understand the formats
slightly better JC123!