Is there any software available that eliminates the voice of the singer from the song & extract music (theme)?

You can remove vocals with Audacity but don't expect too much with this or any other vocal remover software. The result depends entirely on how the track was mixed in the studio. Audacity: http://audacity.sourceforge.net/ Lame if needed to encode to mp3: http://lame.sourceforge.net/ Tutorial: http://www.guidesandtutorials.com/audacity-tutorial.html Method: This is possible only for certain stereo tracks. When the vocals are exactly the same on both stereo channels, you can remove them by “subtracting” one channel from the other. This works for many studio recordings, where the vocal track is mixed exactly in the center. Be aware that bass and drums are usually in the center of the mix and could be removed or reduced also. A computer reads the vocal as data, likewise with bass and drums. Unlike our ears it can't tell the difference. To do this in Audacity 1.2.6: 1. Import your stereo file into Audacity. 2. Open the track menu (click the arrow next to the track title), and choose “Split Stereo Track.” 3. Select the lower track (the right channel) by clicking it in the area around the mute/solo buttons. 4. Choose “Invert” from the Effects menu. 5. Using the track menus, change each track to “Mono.” Press the Play button to hear the results. If you are lucky, the voice will be gone but most of the other instruments will be unaffected, just like a karaoke track. You can use the Export commands in the File menu to save the results. Audacity 1.3.7 beta. Open the song in the program Click, hold and drag to highlight the whole song or "Edit/Select/All" then select "vocal remover" from the effects menu. Export and save from the file menu.

Download and run Audacity. It's a free program that allows you to edit audio files. It has the ability to increase the music and decrease the vocals which will result in an instrumental track.

If you were a singer and you had spent thousand of dollars and hours of your time making a music video, would you really be happy to have scores of total strangers on the web messing around with your video