Karaoke with Web Audio API

Using the Web Audio API it is possible to reproduce the karaoke filter present in some desktop applications to remove the voice from a song. Who needs a program other than a browser?

• Drag and drop a music file (mp3, wav, ogg...)
• Sing it!

Tech

This karaoke uses a number of projects to work properly:

• jDataView - a library that makes it super easy to read metadata from audio files, as explained on Reading .mp3 ID3 tags in JavaScript.
• Kevin Cennis' gist - that shows the way to remove central panned sound.
• Happy by MMO - it's a sample song I'm using for demo pourposes. It's free and legal for personal use.

Installation

Download it and open the index.html file. In order to play the demo song you need to start the code from a server, due to browser limitiations.

Browser support

• Chrome for Desktop
• Chrome Beta for Android. Open chrome://flags/ and enable "Enable WebAudio Android - Enabling this option allows web sites to access the WebAudio API."

Future improvements

• Improve karaoke filter
• Advanced options to tweak the filter
• Play / pause controls
• Research lyrics integration
• Spotify Web Player integration?

Authors

I, @jmperezperez, just put everything in place. Without @possan's help on how to use the Web Audio API this would have been impossible. Big kudos to him!

License

MIT