Only Silence after removing vocals??

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SELBYM
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Joined: Tue Aug 22, 2017 9:58 pm
Operating System: OS X 10.7 - 10.8 Lion / Mountain Lion

Only Silence after removing vocals??

Post by SELBYM » Wed Feb 13, 2019 5:31 pm

Hi, I have this audio file:
https://www.youtube.com/watch?v=YCJEsogIns4
I tried to remove it's vocals and it became only silence. I inverted the whole audio file and happened the same.
Then I tried only inverting one of them. It didn't silence, but the vocal remover didn't work anyway...
Do you think this audio can be fixed so the vocal remover works right on it?
Sorry for my bad english i'm argentinian

DVDdoug
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Joined: Fri Sep 10, 2010 11:30 pm
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Re: Only Silence after removing vocals??

Post by DVDdoug » Wed Feb 13, 2019 6:32 pm

The vocal remover works by subtracting left from right. This removes "centered" vocals which are identical in the left & right channels. It also removes everything else that's in the center. Inverting & mixing left & right does the same thing.*

If you're getting silence you have a mono (or "dual mono") file with identical left & right channels.



..."You can't un-bake a cake or un-fry an egg and you can't un-mix audio." That's why pros record in multi-track. So they can adjust or edit the different instruments & vocals separately before mixing. And, it's the same reason you see multiple mics (run into a mixer) in live performances, so that all of the mics can be adjusted separately before mixing.




*Mixing is done by summation so if you flip the polarity of one channel and mix left & right together you are "adding a negative" which is the same as subtracting.

There is some optional frequency-filtering so you can keep the bass (which is almost always centered).

BTW - If you invert one channel and don't mix, the soundwaves will mix acoustically (in the air). The vocals won't cancel (for some complicated reasons) but you'll get some "weird phasing" and the bass will mostly-cancel. The same thing will happen if you reverse the wires to one speaker.

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