[Mr.T]

"Walt" wrote in message
...
Whenever I buy a CD, I put my favorite songs in my PC. I use Wavelab or
Adobe Audition to convert the stereo file to mono. But its more
complicated than just stereo-to-mono conversion. First, I make two
copies the stereo file. With one copy, I invert the phase of the left
channel and then combine it with the right channel -- this causes
whatever was identical the left and right channel to be cancelled.
Before I combine these two channels, I decrease the loudness of each
channel by 50%.

With the other copy of the stereo file, I don't invert either the left
or right channel. I simply decrease the loudness of both channels by
77.5% and then I combine the left and right together to make a mono
file.

I then combine the audio of both copies together in a new WAV file.
Voila! I get some nice monoaural audio with at least 44.1 khz and at
least 16-bit.

Anybody?

Interesting approach. It appears he's making a mono sum by

.5(R-L) + .775(L+R) = 1.25(R) + .25(L)

I guess he hates the leftt channel. More cello, more bass, less violin,
less percussion. Hey, whatever floats your boat.

The maths is not quite right. Since he is first doing a difference of L and
R, that can be .5(R-L) *or* .5(L-R)
(same thing if you don't ignore the fact that either can be negative
relative to the other depending on the original phase)
Therefore the left channel will NOT automatically be lower than the right.
However the result may or may not be desirable depending on exactly where
each instrument is panned in the mix.

Personally I would only do that if the original mix did not sum nicely to
mono in the first place.

MrT.