Another question our users often ask is “how to extract voice from songs ?”, “how can i make an acapella of this song” ? etc.
Vocal isolation is a black science, it’s the voodoo of audio processing… or just a good old spectral substraction !

The principle is basic, find a part of the song without the voice, and substract it from a part with the voice, so you are left with only the voice part. The ideal situation is where you have the normal song (voice + music) and an instrumental version of the same song.

The magic voice isolator plugin exists !! and it’s free.
Kn0ck0ut VST plugin is a free vocal isolation plugin, based on the spectral substracting principle. It takes two inputs : voice+instru on left and instru only on right and it performs a FFT processing for removing the instrumental part. A sort of acapella maker !

Here’s the VST plugin :

Free Fft Waterfall Vst Plugin

KnockOut VST

Free Waterfall 64 bit download - X 64-bit Download - x64-bit download - freeware, shareware and software downloads. VST 4 FREE - Free Audio Plug-ins and Archives Free audio plugins archive - Instruments and effects for audio software. Plugins for Cubase, FL studio, Reaper, Ableton and other VST/AU platforms. Noise Reduction is a free audio restoration VST plugin developed by Christian Budde. Compatible OS(s): Windows. Noise Reduction is a plug-in containing a spectral noise gate optimized to remove unwanted noise. Features: Highly customisable spectral noise gate. Continuous and consistent characteristic. DtBlkFx by Darrell Barrell is a freeware Fast-Fourier-Transform (FFT) based Multi effect VST plug-in for Windows and Mac. DtBlkFx v1.1 features Precision parametric equalizing with sharp-roll off. Here is a list of best free audio spectrum analyzer software for Windows. These spectrum analyzer software let you visualize audio spectrum for real-time signals. In some of these audio analyzer software, you can analyze amplitude and phase spectrum as well.Also, you can visualize audio spectrum in FFT spectrum, 2D spectrogram, Octave spectrum, etc.

info + download

Now you can download the VST plugin and copy the dll in your VST folder.

How to isolate vocals / get the vocal out of the song :

If you have the normal song (vocal+instru) and the instumental version :

• 1. open Wavosaur
• 2. menu Files->Open and select the files to load (one song file + instrumental file)
• 3. if the files are stereo, for each file unselect left channel ( press the “1” key), select all (CTRL + A) and use menu -> Process -> Mute : this mutes the right channel
• 4. on the instrumental file, use menu->Process->Swap channels
• 5. use copy / cut / paste to select the part you want to “extract” and try to make the two files “in sync” the best you can (use zoom in in time & amplitude for more precision)
• 6. select all (CTRL + A) the instrumental part and copy (CTRL + C)
• 7. select all the normal part and use menu->Edit->Paste special-> Paste and mix
• 8. open VST rack, load KnockOut VST plugin, and open the plugin UI
• 9. use the “R input gain” to find the right balance between vocal isolation and overall quality : the more you increase the parameter, the more the vocal is isolated, but the effect is more drastic and you can clearly hear the artefacts of the spectral processing

Vst 4 free reveiw. if you don’t have an instrumental version, you can try to find a part in the song with no vocal, that is similar to the part with vocal.

here’s a test :

Free Fft Waterfall Vst Tutorial

voice+instru on left & instru only on right:
https://blog.wavosaur.com/wp-content/uploads/2015/02/feel-the-beat.mp3

Free Spectrogram Vst

after the kn0ck0ut processing for isolating vocal:
https://blog.wavosaur.com/wp-content/uploads/2015/02/feel-the-beat-acapelized.mp3 auto tune evo vst audacity download crack