on GitHub

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.

Select an Audio File

Please select an audio file

Filter Sound

Src Channel	Dest Channel	Volume
Left	Left
Left	Right
Right	Left
Right	Right

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