[vorbis] fake stereo

[Craig Dickson]

SyP wrote:

> - I know this experiment may seem silly, since I could preferably
>   convert the song to mono before encoding, but there could be a
>   number of CDs of older recordings, which were originally recorded as
>   mono and burned as fake stereo, right?

I think all audio CDs are two-channel, aren't they? So mono recordings
would have to be done as two identical channels (nobody could be so dense
as to release it as left-channel-only, with the right channel silent, and
surely no one is still promoting "mono reprocessed for stereo", that
vile atrocity of the '60s and '70s?). Certainly in my experience, when I
rip a mono CD, I get two channels. I experimented a while back (beta 4 or
RC1) with taking some of these wavs and throwing away the right channel.
Oggenc then quite happily gave me one-channel vorbis files, though the
relationship between the command line options and the resulting bit rate
was somewhat unintuitive.

Craig

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