DIY Acapellas

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stray411

stray411

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Had to post this since there seems to be some much talk of remixing going on. This is a technique I found on another site. Some of you might of heard this if not;

To create your own acapellas from full mixes you will need the full mix at CD quality (MP3 will work but nowhere near as good) and the instrumental version at CD quality. The full version and the instrumental have to have had the same processing done in mastering and need to be the same length for this process to work properly. If this is not the case unfortunately you're screwed, this method won't work.

First you need to invert one of the tracks. I find it best if you invert the full mix rather than the instrumental. Most wav editors like Sound Forge, Goldwave and Audacity have the invert process. Save the inverted version and discard the original.

Next you'll need to get both tracks (instrumental and inverted mix) lined up in a multi track program of some sort. They need to be PERFECTLY lined up or else the process will not work.

Once they are lined up play them back together and voila, your very own DIY acapella from a full mix.

Although, I'm not positive on the exact theory, basically one sound mixed with the opposite (or inversion) of itself results in silence.

Have fun with this.

Stray
 
Yeah I heard about this.

When you have two sounds exactly the same but the opposite way round they cancel each other out.
 
GOTTA DIS PROVE THIS MYTH. ONCE YOU REVERSE THE WAVE THE BEATS WONT MATCH UP BECAUSE YOU CANT REVERSE EACH NOTE IN ITS PLACE YOU ACTUALLY REVERS THE DIRECTION OF THE WAVE
 
soundboy said:
GOTTA DIS PROVE THIS MYTH. ONCE YOU REVERSE THE WAVE THE BEATS WONT MATCH UP BECAUSE YOU CANT REVERSE EACH NOTE IN ITS PLACE YOU ACTUALLY REVERS THE DIRECTION OF THE WAVE
Click to expand...

Soundboy,

A. This is not a myth, it is a proven theory.

B. I didn't say REVERSE the wav, I said INVERT the wav.

Stray
 
Tried it...

It works, but trying to get the files to line up perfectly is hard as hell. the only way i got it to work was with a song of my own where the start end end of the wav was exact. But to get that exact line up when u exract from a cd is quite a task. I'd take the file and expand the image as wide as Sound forge would allow. I matched the very first spec of an image of the first kickdrum on each file and clipped the file there and the last and clipped there too. to the naked eye it looked perfect. but it was never perfect enuff for the tracks to phase each other out. but like i said when i created my own perferctly lined up files, it most def worked.
 
YEA IT IS A BITCH TO LINE THEM UP I'LL KEEP SURFING FOR THEM BUT IT IS DOABLE.
 
Just a though..........

Wouldn't you also be able to get the beat on it's own by using the same method, providing you have the acapella?

Say you go the without me single and inverted the acapella given on the disc then put it inline with the the original track wouldn't you then have the beat on it's own? Which you could then rip or (more likely judging by THE BIG THING that's about to exlplode in this forum ;) ) sample it.
 
i just asked a question about this on the mixing forum.

https://homerecording.com/bbs/showthread.php?s=&threadid=88469

i'm going to try this tomorrow when I'm not sleepy:

1) load the CD track in to audio software.
2) split the stereo wave into mono left and right
3) flip the phase of the right channel.
4) mix this to a stereo track.

now you've got a mix with no lead vocals [karaoke mix].

5) split the karaoke mix to separate left and right tracks
6) flip the karaoke left track phase
7) mix all 4 tracks... the orig L and karoake L should cancel everything but the lead vocal in the left channel, and the orig R and the karaoke R (already phase flipped) should cancel everthing but the lead vocal in the right vocal.

8) EQ out the Bass/Kick if they were panned center.
 
yep

i experimented with this a while back and it works. instead of me going into a long detailed discussion of what some of you may have done wrong, i will just point you to a link using a very similar theory to eliminate vocals. the very same theory can be used to isolate the vocals as well.

http://www.prorec.com/prorec/articles.nsf/files/59DF95F3E26CA553862567C9000A9B48

side note- ripps from proffessionally mastered cd's have a lot of advanced processing, (reverb,stereo/spatial imaging......) which makes it more difficult to phase out everything. the less processing in the music, the easier it is.
 
this is good info ..i have to try ir out to see if i can do it
 
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