Voice Out - an HTML5 Web Audio API Demo
This web application lets you play a song and filter out voice (and some other instruments) in real time.
- Only tested on Google Chrome.
- The file must be stereo.
- The file must have resonable quality.
This application works by subtracting the wave of the right channel from the left channel. Most songs have the vocal track on the center, so the waveform of these sounds are the same in both left and right channel. When we subtract one from another, they interfere destructively, thus removing the sound.
In addition to vocals, I found out that these instruments are usually center-panned (meaning they too will be filtered out):
- Bass
- Kick Drum
- Lead Guitar
On the other hand, these sounds are usually NOT center-panned, and remains in the song (some even stand out):
- Piano
- Crash Cymbals
- Some Hihats
- Synthesizers
- Strings
- Rhythm Guitar