bigfool1956;268514 Wrote: 
> Hmm, I don't have a mono option in my system, but it occurs to me it
> would be good if, as you say, you picked one of the channels to use.
> 
> Which leads me to ask, is there a way to extract one channel from a
> stereo wave (of a mono recording) and then to duplicate it and
> re-interlace it.
> 
> Wow, that would be a huge sentence to plonk into Google!
My usual workflow is do a cursory check for mono; if it appears to be
mono, invert the right channel and the sum the channels (mono fold
down).  This will generate a mono difference signal so I can be sure. 
If I determine its for sure mono, I generally just "undo" the fold
down, restoring the stereo and use the left channel as my mono signal. 
In rare cases where I decide to use the right channel or sum both
channels, then I "undo" the right channel inversion first.

If the "mono" is left as it comes off CD, FLAC faithfully encodes all
of the channel differences, even though they are actually
imperfections.  Even in the best case, I've never seen a CD with
numerically identical channels; all CDs I've seen at least use
different dither streams for each channel, and FLAC will faithfully
encode the dither difference, which will be a rather non-compressible
albeit small residual due to its random nature.


-- 
Timothy Stockman
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