[vorbis] what quality ?

[Craig Dickson]

begin  gabor  quotation:

> as i understand you use more kb/s for mp3s.... how much?

Whatever it takes for a particular piece of music to sound good. In
general, I find MP3 comfortably listenable starting at 192 kb/s, but
I prefer 256 kb/s or better. (These are CBR numbers -- I have only a
few VBR MP3 files.)

> and what kind of music is best to test compression-lossiness?

Practically speaking, the music you like to listen to is what you should
use for your own testing. You may find that you prefer different
compression parameters for different kinds of music, simply because your
ears are more sensitive to compression artifacts in certain types of
music. (For example, you may notice artifacts more easily in cleanly-
recorded acoustic instruments than in heavily distorted electric
guitars, or more easily in solo instruments than large ensembles.)

If you're just trying to decide how to encode music for your own
personal enjoyment, then your own ears are the only judge.

If you specifically want some good samples for testing compression
quality and teaching your ears to detect artifacts, there are some
collections around the net that can come in handy -- mostly short .wav
files recording particuarly challenging sounds that tend to fare poorly
with perceptual codecs. I don't have any URLs handy at the moment,
but www.r3mix.net and ff123.net might be good places to look.

Craig

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