Ahh ok sure. Yeah you're right I think, it's annoying because in theory, L - R should give you what's *not* in the centre. But that ends up not being very useful anyway :)
I'm no expert, but sounds like Mid-Sides could give you what you need, no? > then you can get rid of the Mid and *voilà* : sides. Eran, Mid-side is a different encoding to Stereo as you have 3 channels instead of 2, meaning the mono signal is already available. Cheers, Joe On 12 October 2012 10:49, i go bananas <[email protected]> wrote: > oops, sorry about the double reply Joe, i forgot 'reply to all' > > to turn a stereo signal into a mono one, yes it's L+R..but that's not what > i wanted to do. I wanted to take ONLY the parts of a stereo mix which lie > right in the middle. It would be basically the inverse of a stereo > difference effect. > > To put it another way, Stereo difference removes those parts of the mix > which are panned dead center. What i want to do is leave those parts, and > then remove anything that isn't panned dead center. > > At first, i thought it would be as simple as just subtracting the stereo > difference signal from the original mix. But when i actually tried it, it > didn't work, and then also when i worked it out logically on paper, i > realized that it's impossible just with simple arithmetic. > > > > My best guess, is that you could FFT the stereo difference signal to get > it's spectral profile, and then subtract that from the original mix. Might > give it a go some time. > -- Follow me on Twitter @diplojocus
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