Re: [LAU] Filtering out everything but the centre position in stereo

On Fri, 23 Aug 2019 at 01:44, Jeanette C. <julien@mail.upb.de> wrote:
>
> is there an effect or a method to filter out everything from a stereo file but
> the "centre"? A sort of reverse karaoke effect.

Hi, my reply is interleaved with others below.

On Fri, 23 Aug 2019 at 04:57, Jeanette C. <julien@mail.upb.de> wrote:
> Aug 22 2019, Ralf Mardorf has written:

> > On the quick my guess is
> >
> > Original left channel + inverted right channel = plain_left
> > Original right channel + inverted left channel = plain_right

L + (-R) = L-R = X = what was called above "plain_left"
R + (-L) = R-L = Y = what was called above "plain_right"

> > Original left channel + inverted plain_left = middle only
> > Original right channel + inverted plain_right = middle only

L + (-X) = L - X = L - (L - R) = L - L + R = R
R + (-Y) = R - Y = R - (R - L) = R - R + L = L

So you finish with the same signals that you started with,
except that the channels are swapped.

> That sounds good. Unforunately it didn't work.

Both aspects explained above :)
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Received on Sat Aug 24 12:15:01 2019