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Speex For Music: Send Your Comments.
jmvalin
post Aug 30 2002, 00:04
Post #1


Xiph.org Speex developer


Group: Developer
Posts: 473
Joined: 21-August 02
Member No.: 3134



In the last Speex version (0.8.0), I added a new 42.2 kbps wideband mode which I'd qualify as the first non-catastrophic mode for music. I'd like to have feedback on music quality using that mode, let's say on a scale between "You call that music?" and "Almost as good as MP3". To try that mode, use the --quality 10 option *without* using --vbr. The file needs to be sampled at 16 kHz. The idea of this mode is to be able to encode occasional music segments in a mostly-voice recording (e.g. Internet radio). So what are the opinions?

BTW, Speex source code is available here and there are Windows binaries on RareWares.
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jmvalin
post Aug 30 2002, 14:56
Post #2


Xiph.org Speex developer


Group: Developer
Posts: 473
Joined: 21-August 02
Member No.: 3134



QUOTE (john33 @ Aug 30 2002, 04:43 AM)
I think if you compare an ogg created using '-q -1', downmix to mono and resample to 22050, you will get output at approx 16kbps which sounds somewhat better than the speex equivalent. At least it does to my ears!! smile.gif

You mean on music Ogg at 16 kbps sounds similar to Speex at 42.2 kbps? I consider that not bad since Speex has never been designed for music? Can you tell whether most of the artifacts in Speex are in the lower half-band or higher? (this is useful because both are encoded separately after a QMF).
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