How to get sum and difference from XY stereo track

Archived from groups: rec.audio.pro (More info?)

On Wed, 26 Jan 2005 23:25:22 -0900, "Tim Sprout" <tman@ptialaska.net>
wrote:

>I want to experiment with stereo imaging. I have
>an XY stereo track. To sum Left and Right, I
>mix the stereo track down to mono? How do I
>get the difference? I have no external mixer. I'm
>using Adobe Audition.

A mono mix is, obviously enough, the sum.
If you invert the polarity of one track then mix to mono, you get the
difference. Invert is top of the Effects menu in Audition 1.5.

X+Y = ...er....X+Y :-)

X+(-Y) = X-Y

CubaseFAQ www.laurencepayne.co.uk/CubaseFAQ.htm
"Possibly the world's least impressive web site": George Perfect

Archived from groups: rec.audio.pro (More info?)

Tim Sprout wrote:
> I want to experiment with stereo imaging. I have
> an XY stereo track. To sum Left and Right, I
> mix the stereo track down to mono? How do I
> get the difference? I have no external mixer. I'm
> using Adobe Audition.
>
> Thanks!
>
> TS

Are you trying to convert your XY arrangement into a psuedo-MS so that
you can vary the width of the stereo field? If so, I think I can help.
First pan both signals center, and take the resultant mono output and
buss it to three different mono channels. Invert the signal the third
of these channels and stereo pair it with the second, and pan these
hard in opposite directions (you'll have to experiment to see which one
is L and which is R by comparing to your original recording) . This
should now function as the S-component of your pseudo-MS. The first
mono track is now your M. This won't be true stereo, but it can create
stereo-like effects with any mono source.

Good luck,
Mike

Archived from groups: rec.audio.pro (More info?)

"Tim Sprout" <tman@ptialaska.net> wrote in message
news:10vh99bpva0jsd0@corp.supernews.com...
> I want to experiment with stereo imaging. I have
> an XY stereo track. To sum Left and Right, I
> mix the stereo track down to mono? How do I
> get the difference? I have no external mixer. I'm
> using Adobe Audition.
>
> Thanks!
>
> TS

--

>Laurence Payne wrote:
>
>A mono mix is, obviously enough, the sum.
>If you invert the polarity of one track then mix to mono, yo­u get the
>difference. Invert is top of the Effects menu in Audition ­1.5.

>X+Y = ...er....X+Y :-)


>X+(-Y) = X-Y

--

>bsuhorndog wrote:

>Are you trying to convert your XY arrangement into a psuedo-­MS so that
>you can vary the width of the stereo field? If so, I think ­I can help.
>First pan both signals center, and take the resultant mono o­utput and
>buss it to three different mono channels. Invert the signal­ the third
>of these channels and stereo pair it with the second, and pa­n these
>hard in opposite directions (you'll have to experiment to se­e which one
>is L and which is R by comparing to your original recording)­ . This
>should now function as the S-component of your pseudo-MS. T­he first
>mono track is now your M. This won't be true stereo, but it­ can create
>stereo-like effects with any mono source.


>Good luck,
>Mike


>Bob Cain wrote:

>effects->amplitude->channel mixer


>You can send 50%+50% to one output channel and 50%-50% to
>the other.


>Bob
--




Great info, guys. Thanks!

TS