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The technique to minimize the human voice and remain the music voice of a mp3, we can use Audacity ( audacity.sourceforge.net ). 1. Click the "down" triangle to open the menu. 2. "Split Stereo track" 3. "Mono" both track 4. Select and invert one of the track ("Effect" -> "Invert") 5. Save the MP3 Step is shown in the below picture: [ mp3 去人聲 audacity ]