Is it possible to separate voices from one mp3 file?

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I want to separate 2 or more voices from one audio file,
is there any software to this ?

I have done some googling and seen that the answer is NO in most cases.

But I think at least there should be a way to see different frequencies (just like waveforms) and edit those manually ?

I use audacity for editing audio occasionally but don't know if it can do this ?

arnab

Posted 2012-12-04T15:31:11.933

Reputation:

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Well, Google is not lying. If you'd like to see if your particular case could be a YES, perhaps you could post an example (via Soundcloud) in your question.

– JoshP – 2012-12-04T15:38:17.487

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You could use an unsupervised machine learning algorithm. I am going to try this, I'll let you know how it goes.

– Valentine Bondar – 2016-10-03T09:03:28.757

Answers

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Yes, it is possible, but it isn't easy.

There are a number of free tools for editing audio in the frequency domain. I haven't had much luck isolating specific sounds with them, but I have been able to do some sonic manipulation that wasn't possible with traiditional audio editors.

The latest version of Melodyne is supposed to be able to pick out individual instruments and notes from chords. I haven't used it myself, and it is fairly expensive. But professionals who have used it seem to swear by it.

ObscureRobot

Posted 2012-12-04T15:31:11.933

Reputation: 4 290

2+1 for Melodyne (and its DNA technology), although it doesn't work so well with voices as with instruments. Worth a shot though. – None – 2012-12-04T20:21:27.500

That makes sense. Spectrally complex sounds are much harder to isolate than spectrally compact sounds. – ObscureRobot – 2012-12-04T21:29:42.723

2+1 for Melodyne. I have used this on a number of classical recordings and it works very well - you can pick out individual instruments at individual pitches and then manipulate the pitch of those isolated notes. It's indispensable. – Mark – 2016-12-01T09:34:44.900

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Take "no" for an answer. (-:

If the voices occupy distinct frequency ranges you might be able to use bandpass filters to separate them. But this is highly unlikely, as most voices have most of their ranges in common.

Switch Audacity to FFT view to see where the voices fall in the audio spectrum.

Jim Mack

Posted 2012-12-04T15:31:11.933

Reputation: 1 661

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NO. There is no practical way of doing this with technology that is currently known.

If there were, Hollywood wouldn't be spending millions of dollars (and weeks of expensive actor time) dubbing dialog tracks for movies.

Richard Crowley

Posted 2012-12-04T15:31:11.933

Reputation: 1 849

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To sum up : in 90-95% it is not possible, but in situations where the song has also an instrumental (identical to the song - by identical, i mean the actual song parts without voices), then, all you have to do is, subtract the instrumental from the song (you may have to do it in segments). This is home some acapellas are made, if I am not mistaken.

After writing this I found a few things that might be of interest: http://www.crazypellas.net/forum-support-and-feedback-86/tutorial-how-to-make-diy-acapellas-6175/ (THE PHASE CANCELLATION METHOD is mentioned by me, above)

barbossusus

Posted 2012-12-04T15:31:11.933

Reputation: 111

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David

Posted 2012-12-04T15:31:11.933

Reputation: 21

1Could you please add some details as to how the link answers the question? As it is now, if the link goes dead, this will no longer be an answer. – AJ Henderson – 2017-09-29T22:25:45.743

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Using machine learning unsupervised algorithms, cocktail problem can be solve. Unsupervised algorithms takes different feature of the input into account and cluster into various meaningful group. This technique can be used to separated mixed voices into different group. Below is the code that can be used in matlab to separate mixed audio into separate audio files. [W,s,v] = svd((repmat(sum(x.*x,1),size(x,1),1).*x)*x');

You can also implement K-Means algorithm in python or R to get this work done. However, you need to check how to convert audio files into matrix of bits that can be given as input to this algorithm.

Bikram Nayak

Posted 2012-12-04T15:31:11.933

Reputation: 11