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 Post subject: Re: Voice elimination
PostPosted: Sat Feb 03, 2007 3:11 am 
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Lonman @ 3rd February 2007, 6:33 pm wrote:
Every devocalizer works on the same premise - completely dependant on the way the orignal song was recorded.
Vocal eliminators search for like frequencies on each channel - which vocals are generally equal on both channels.  However, many instruments can also be panned equal (straight up) on both channels & those will be equally eliminated - most commonly bass guitar, kick drum, snare drum, some guitar solos, some keyboards, some background vocals.  Even the best prgrams can't get those back.


It is possible to get back the kick and the bass if those are panned cener. Send the original wav file through a low pass filter. Save it and mix it with the devox track. You will get the bass and kick back.

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 Post subject: Re: Voice elimination
PostPosted: Sat Feb 03, 2007 3:17 am 
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Jian I am going to send you a track he made for me and you will see what I mean I will just send the backing then I will send the orig with the singer on.

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 Post subject: Re: Voice elimination
PostPosted: Sat Feb 03, 2007 3:28 am 
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Jian @ Sat Feb 03, 2007 3:11 am wrote:
Lonman @ 3rd February 2007, 6:33 pm wrote:
Every devocalizer works on the same premise - completely dependant on the way the orignal song was recorded.
Vocal eliminators search for like frequencies on each channel - which vocals are generally equal on both channels.  However, many instruments can also be panned equal (straight up) on both channels & those will be equally eliminated - most commonly bass guitar, kick drum, snare drum, some guitar solos, some keyboards, some background vocals.  Even the best prgrams can't get those back.


It is possible to get back the kick and the bass if those are panned cener. Send the original wav file through a low pass filter. Save it and mix it with the devox track. You will get the bass and kick back.


With Adobe Audition at least, you can adjust the frequency response of what will be eliminated during de-vocalization.  You want to set the bottom cutoff point of the hi-pass filter as high as you can in order to preserve the bass frequencies in the kick drum and bass guitar.


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 Post subject: Re: Voice elimination
PostPosted: Sat Feb 03, 2007 6:04 am 
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Many vocal removers (like one in Karaoke Sound Tools or Karaoke CD+G Creator) allow to set bass and treble frequencies that are not affected by vocal removing, and it improves the quality greatly. They also have panning control if the vocal is not mixed in the middle. And, in my opinion, this is all that can be done. If anybody claims that they can do better, its just marketing talk.

It has been scientifically proved that it is impossible to separate N sound sources if there is less than N separate recording tracks (so in theory it would be possible to separate vocal and piano if no other instruments were used). Also any effect applied during mastering (like stereo echo, reverb, or chorus) makes the task impossible.


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 Post subject: Re: Voice elimination
PostPosted: Sat Feb 03, 2007 8:44 am 
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BTW Dennis... a recording that has strong vocals and not a lot of music behind it usually doesn't work for vocal removal unless it was recorded in just the right way... or unless there are matching instrumental parts in the song you can use to replace the parts where they sing. I've used the editing out vocals technique on several songs where it works everywhere except maybe the chorus where the music is often louder and I can get away with vocal reduction for those parts. I actually prefer to do it that way when possible, as there are *no* vocals left in most of the song (it allows me to keep more of the song in stereo too).

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