Editing quality of a file

So im hard stuck with my problem here, i want to get accapella of a song that has sampled backround music/beat, so…
I can do it with FL Studio 12 if i just get what i need but thats the problem.
I need the beat of the song (without vocals) that i can do, by simply using vocal remover, and i need the original song(beat+vocals) with same quality as the beat that i have after using vocal remover to it. So the problem is that when i use vocal remover the quality of them is different so i cant use reverse polarity to isolate the beat from the song.

My question would be can i anyhow edit them to be exact same quality after using vocal remover?
I dont mind if the quality goes a bit bad as long as its listenable, just dont feel like spending hours of work in to this if its not even possible :confused:
If it helps this is the song im trying to do

You can try the tricks, but as a fuzzy rule, processing and compressed sound pretty much kill using reverse polarity. For one example, the voice after Vocal Remover doesn’t have a good relationship to the stereo voice.

Using Audacity to edit an MP3 gives you two different tracks. They may sound the same, but it kills reverse polarity.


Do you have any idea how i could even lower the backround music of that type of songs? Becouse i know its possible but no1 tells how its done.
I have looked up internet about this for weeks now and im out of ideas.

i want to get accapella of a song

You can try the [u]Vocal Reduction and isolation[/u] (with the Isolate Vocals option). It’s more sophisticated than the regular Reduce Vocals effect. But I wouldn’t expect “professional” results… I consider these “novelty effects”.

Professionals record in multi-track (with the vocals and every instrument on separate tracks) so they can edit/process/re-record all of the components separately before mixing. “You can’t un-bake a cake and you can’t un-mix audio.”

So the problem is that when i use vocal remover the quality of them is different so i cant use reverse polarity to isolate the beat from the song.

Removing center-channel vocals is simply a matter of subtracting left from right. That will completely remove everything that’s in the center and in-phase (everything that’s identical in the left & right channels). “Technically”, the quality is perfect and you get exactly L-R… If the left & right channels are totally unrelated (such as guitar on the left and vocals on the right) you’ll get a perfect mono mix and the L-R will sound exactly like L+R.

With filtering, you can leave the bass and high frequencies that are outside of the vocal range. However, once you have the track with the vocal removed, there is no way to subtract to get “center only”. (Extracting the center-only channel requires some fancy DSP.) And of course, the center usually contains more than just the vocals.

With “simple” addition & subtraction there are only 4 possibilities, no matter how many times you add/subtract -
L only
R only

…There are variations & combinations such as 2L-R, or -L, etc., but nothing that kills left & right, leaving the center.

Becouse i know its possible but no1 tells how its done.

There is a very long post a while back where we beat this up for months. It looks like it should be possible, but it’s not.

Post back if you find someone who can do it and is willing to tell.

Audacity still can’t split a mixed performance into separate music and voice so you can mess with one without the other.

Fair Warning about YouTube posts and on-line instructions. There was a posting from someone who made their own custom wind cover for a microphone. These covers are normally expensive so it got our attention.

After weeks of neighborhood haunting and research, it turns out the poster got custom material from a fabric store in Tucson and it’s been discontinued. The posting is probably still up there years later. Complete waste of video time.

Audacity does not have official on-line videos!


A plugin called Kn0ck0ut uses a different method than Audacity’s vocal-isolation :
Output from Kn0ck0ut sounds computery, but as the rapper is auto-tuned it’s less conspicuous than usual…