--- Reggie Bautista <[EMAIL PROTECTED]> wrote:
> William T. Goodall posted:
> >Just to footnote that there is a review at Stereophile Magazine, complete
> >with measurements and graphs and all, that concludes:-
> >
> >" The iPod's measured behavior is better than many CD players—ironic,
> >considering that most of the time it will be used to play MP3 and AAC
> >files, which will not immediately benefit from such good performance. But
> >if you're willing to trade off maximum playing time against the ability to
>
> >play uncompressed AIFF or WAV files, the iPod will do an excellent job of
> >decoding them. Excellent, cost-effective audio engineering from an
> >unexpected source.—John Atkinson"
> >
> >http://www.stereophile.com/showarchives.cgi?934:0
>
> Just for the record (pardon the pun), uncompressed cd-quality audio
> takes up about 10 megs per stereo minute* That means that
> on a 40 gig iPod you would be able to hold up to 4000 minutes of
> uncompressed cd quality wav or aiff files**. The iPod battery only lasts
> 8 hours, or 480 minutes!
>
> (That is all assuming, of course, that I did the math correctly. :-)
>
> Reggie Bautista
>
> *44100 samples per second times 16 bits per sample equals 705600 bits
> per second. 705600 bits per second divided by 8 equals 88200 bytes,
> which rounds up to 9 megabytes. There is also a small amount of overhead
> for format information in the header of the file, but not a full megabyte
> worth.
> Yet I've always been told in recording classes and electronic music classes
> that a good estimate is 10 megs, not 9 megs. I assume this is merely for
> convenience since it's a number that allows for quick and dirty size
> estimates
> such as the one I made. If my math is faulty, please let me know! Thanks.
>
> ** I'm not sure how much (if any) overhead the iPod has per file, but the
> article didn't mention any. If there is overhead beyond the header info I
> already mentioned, I'm pretty sure it wouldn't make up the megabyte per
> minute difference mentioned in "*".
16 bits per sample? yuck! get with the program, we are talking 24 at the very
least and 32 if you are recording to standard mdvd. never mind the format
wars).
Anyway, you forgot the song info but stil, the 10 mb estimate is rounding up.
I'm on SX with a Lyla 24. So 24 is all I can crank in analog. Full 32 onboard
though. What do you use Reg? LE, SX, Sonar?
=====
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Jan William Coffey
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