Greg Maxwell wrote:
> > I've found a small sound segment that produces very unpleasant artifacts
> > with LAME's VBR mode.
>
> I've found that *ANY* pure speech sample will do this to some extent or
> another (I went out an bought a few BOOKS-ON-CD for VBR test cases).
Actually, this is music, but the vocals (and "s" sounds) are very dominant
in this small segment. The whole track is affected, even in instrumental
parts. Maybe it's not the voice at all?
The main reason I was investigating "mean bitrate" VBR is that I have a 14
hour (!) BBC radio dramatisation of Lord Of The Rings on CD, and it has
become a pet crusade of mine to try to squeeze it - with the best quality
possible - onto a single CD. It's a mixture of near-silence, voice, music
and sound effects, so good quality VBR encoding would be ideal. The mean
bitrate would have to be around 100kbps, so I have up to now been using the
Fraunhofer encoder at 96kbps. I guess I'll have to wait for the VBR core
(and perhaps the low bitrate support?) in LAME to improve a bit before I can
consider switching over. I think something like the "bitrate profile" idea
would also be necessary to do it properly.
-- Mat.
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