From: Kade Hansson <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, November 03, 1999 5:51 AM
Subject: MD: In compression, the encoder rules
> Ah, but encoders *are* different. This also goes part way to answer the
> question on different ATRACs affecting recording.
>
> ATRAC playback and MP3 playback (decoders) are well defined- once you have
> a data stream encoded, it will produce the same digital data on playback,
> unless you have been screwing with your equalizer. Any differences to the
> sound are not because of different ATRAC (or MP3) decoders.
This is the case with ATRAC, but not with MP3. The power of the system you
are using to play back the MP3 can come into consideration, as can hardware
interpolation on sound cards or in software. If you take an MP3 and play it
back via a system that has a hardware MPEG decoder card in it (assuming you
have it set to handle MP3 decoding) it will sound far better - the card has
dedicated hardware that handles smoothing and frequency boost/cut which will
automatically come into play to compensate for what may have been lost in
MP3 encoding. If the decoder does not conform exactly to the MP3 standards
this will also make a difference - compare the same MP3 played back in
WinAmp 1.8 with playback in WinAmp 2.5 - there is a difference!
If there is a difference in quality of playback between to MD recorders
using the same disc, it is because the quality of the DAC in the unit
varies, not due to ATRAC differences.
Magic
--
"Creativity is more a birthright than an acquisition, and the power of sound
is wisdom and understanding applied to the power of vibration."
Location : Portsmouth, England, UK
Homepage : http://www.mattnet.freeserve.co.uk
EMail : [EMAIL PROTECTED]
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