graham at grahammitchell.net
Fri Jan 11 19:18:01 PST 2002
>> 1) Sound quality vs. file size is very nice. (I quoted for them that
>> for similar quality, oggs are about 10% smaller. (-q 3 ogg vs 160Kbps
> Only 10? I would have thought it was nearer 50...
Here's my limited test data. (One whole track!)
WAV ripped with cdparanoia
All mp3s encoded with BladeEnc 0.94.2
All oggs encoded with oggenc rc3
33,297,308 wav at 44.1 kHz, 16bit, stereo
10,925,105 ogg at quality 10
5,838,443 ogg at quality 7
4,780,845 ogg at quality 6
3,857,689 ogg at quality 5
3,775,216 mp3 at 160 kbps CBR
3,062,303 ogg at quality 4.99
3,019,756 mp3 at 128 kbps CBR
2,940,897 ogg at quality 4
2,690,468 ogg at quality 3
2,292,667 ogg at quality 2
1,945,478 ogg at quality 1
1,509,669 mp3 at 64 kbps CBR
1,505,778 ogg at quality 0
So it seems I was wrong, after all. The -q 3 ogg is a bit more than 25%
smaller than the 160 Kbps CBR mp3. I'll have to tell my classes about that.
And surprised that my memory was so bad I'm now encoding several whole albums
at -q 3 and 160 Kbps mp3 for size comparison.
> Don't forget: No gaps between tracks. Mp3 decoders can't
> play two tracks without a gap between them - no good for
> recording albums where there's no breaks between tracks.
Actually, I've never noticed this. All my mp3s were encoded with BladeEnc
and I was using the xaudio library with a custom player. Under Windows with
Winamp the gaps were noticable, but under Linux with my player I never heard
any (even playing things like Paul Oakenfold or Dark Side of the Moon).
But I'll mention that, too, since some of my kids may be hearing gaps.
Graham Mitchell - computer science teacher, Leander High School
"They come to watch me burn."
-- Charles Spurgeon
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