Removing music and keeping vocals

[manicspike]

I'm sure this has been asked before. I tested the Center Pan Removal and got just the music so I know that works. Now I'm wondering if there's a way to just hear the voices themselves.

The reason for this is I have a movie that does not have subtitles, so I'm making my own. There are a few scenes where the music is much louder than the dialogue. I'd like to be able to silence the music. I've already been able to silence the vocals, so the opposite could certainly be done couldn't it?

[Trebor]

I tested the Center Pan Removal and got just the music so I know that works ... so the opposite could certainly be done couldn't it?

A qualified yes ... http://forum.audacityteam.org/viewtopic ... 764#p82764
[Centre pan isolation can't be done using the inversion, a.k.a. destructive interference method, of center pan removal.
another method, spectral subtraction, is required, which is what the Extraboy and Kn0ck0ut plug-ins use ].

[whomper]

shades of ross perot
i am all ears

***IF*** they subtracted the vocal and have only the music
why cant you invert the music signal and add it to the original
to get the vocals only?

[Trebor]

***IF*** they subtracted the vocal and have only the music
why cant you invert the music signal and add it to the original to get the vocals only?

http://forum.audacityteam.org/viewtopic ... 254#p29254

[whomper]

thanks , sort of
last time i read that topic
it was double talk

how about somebody, anybody, giving a straight answer in english

i know what that thread *** claims ***
but i see other forum on the net that say otherwise

i would like to see a valid explanation not just claims

anybody ???????

[Trebor]

thanks , sort of last time i read that topicit was double talk

i would like to see a valid explanation not just claims

I'll have a go ...

Left audio = L
Right audio = R
Centre audio = 2C

Left channel = L+C
Right channel = R+C

Remove centre audio: (L+C)-(R+C) =L-R (mono)

http://forum.audacityteam.org/viewtopic ... 254#p29254

Subtracting the centre pan removed mono from the original stereo in an attempt at centre pan isolation gives …

Left channel (L+C) and Right channel (R+C) minus centre pan removed mono (L-R)
=> (L+C) + (R+C) - (L- R)
=> L + C + R + C - L + R {double negative gives "+R"}
=> 2C + 2R

centre isolated audio is “2C“, so “2C+2R” is not centre audio.

If you define “Remove centre audio“ as : (R+C)-(L+C) =R-L (mono)
=> 2C + 2L, (which still not “2C” on its own).

[steve]

Here was my original post on the subject of "Why vocal isolation cannot be achieved through the same or similar techniques as centre pan removal".

http://forum.audacityteam.org/viewtopic ... 868#p32472

i know what that thread *** claims ***

That post does not "claim" anything. It poses a simplified model of a mixing technique and invites the reader to think about it and come to their own conclusion.

but i see other forum on the net that say otherwise

Were they written by someone claiming to be Napoleon Bonaparte?

[whomper]

no
written by a recognised professional
published in a reputable print publication
and on their web

[steve]

You are saying that a "recognised professional" (in what field?) has said what?

[whomper]

professional audio

says that **IF** you can extract either the music or the voice alone
you can invert it and combine with original to get voice or music alone