[vorbis] Channel Coupling and Quality (-q 5 vs -q 4.99)

[Moritz Grimm]

vorbis at papaya.altamente.com wrote:
> bit.  Does anyone have any evidence anecdotal or otherwise on the difference
> between -q 5 and -q 4.99?

I hear a difference on some few of my own tunes (I know them best). It's
*very* subtle, at least to me. Afaik, one of the things that happen in
lossy stereo mode is that low volume noise gets played centered, which
makes it noteiceable to other people than me. I really don't think that
this is a major issue for most music produced for CDs, I could imagine
that Vinyl rips cause some, though.

One of my tunes contains low volume noise, clicks and pops on purpose. I
heard that below -q 5 something was wrong... people not knowing my tune
that well usually don't notice that anyways, though.

It all sums up to "choose the quality level you need" plus some little
headroom, maybe. I use -q 5 because -q 4 is transparent for me in most
cases.

<p>Moritz

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