i think what Joe means by this is what is commonly referred to as a vocal remover. meaning it takes out the center channel, and i believe that it's done using M/S processing on the stereo signal. i can tell you it likely won't involve CPU intensive tasks like FFT because they used to sell kits to remove vocals in the 1980s:<br>
<br><a href="http://www.paia.com/ProdArticles/vocalzap.htm">http://www.paia.com/ProdArticles/vocalzap.htm</a><div><br></div><div>i might be misunderstanding but it sounds like that's what you're after.</div><div><br>
</div><div>scott<br><br><br><div class="gmail_quote">On Fri, Oct 12, 2012 at 10:55 AM, Joe White <span dir="ltr"><<a href="mailto:white.joe4@gmail.com" target="_blank">white.joe4@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Ahh ok sure. Yeah you're right I think, it's annoying because in theory, L - R should give you what's <i>not</i> in the centre. But that ends up not being very useful anyway :)<div><br></div><div><div class="im">
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">I'm no expert, but sounds like </span><span style="color:rgb(34,34,34);font-size:10pt;font-family:arial,sans-serif">Mid-Sides could give you what you need, no? then you can get rid of the Mid and </span><i style="line-height:19.200000762939453px;color:rgb(34,34,34);font-size:10pt;font-family:sans-serif">voilą</i><span style="line-height:19.200000762939453px;color:rgb(34,34,34);font-size:10pt;font-family:sans-serif"> : sides.</span></blockquote>
<div><br></div></div><div>Eran, Mid-side is a different encoding to Stereo as you have 3 channels instead of 2, meaning the mono signal is already available. </div><div><br></div><div>Cheers,</div><div>Joe</div><div><div class="h5">
<br><div class="gmail_quote">
On 12 October 2012 10:49, i go bananas <span dir="ltr"><<a href="mailto:hard.off@gmail.com" target="_blank">hard.off@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
oops, sorry about the double reply Joe, i forgot 'reply to all'<br><br>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. <br>
<br>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.<br><br>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. <br>
<br><br><br>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.<br>
</blockquote></div><br><br clear="all"><div><br></div></div></div><div class="im">-- <br>Follow me on Twitter @diplojocus<br>
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