DeFX Karaoke ported using Juce framework This is a karaoke tool that can be used to remove voice from music. It's based on https://defx.sourceforge.net/ You can connect it via ALSA, jack, pulseaudio, pipewire to your browser, remove voice from YT and enjoy singing along your favorite songs!
The mode of operation is this:
Audio channels have two components that are intertwined: voice and music. Usually, voice has the same phase and amplitude in both stereo channels.
Thus, we can try to remove voice like this:
- New left channel = L-R
- New right Channel = R-L
We can also add the mid channel M = (L+R)/2 after we remove all voice frequencies, in order to restore low and high frequencies. We remove the middle frequencies by using a modifiable lowpass and highpass filter.
Finally:
- New left channel = L-R + M
- New right Channel = R-L + M
Here are the parameters of the Karaoke filter:
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Dry/Wet mix: control how strong karaoke filter should be ( from 0% to 100%, default 100% )
-
Filtered mono level: How strong the mid (M) channel should be. (0% to 200%, default 80%)
-
Low-pass filter cutoff frequency.
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High-pass filter cutoff frequency.
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Q value of low-pass filter.
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Q value of high-pass filter.
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Bypass Karaoke button, if you press it, no filter is applied, like 0% in Dry/wet mix.
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Solo filtered mono, if you press this, you should hear only the mid channel ( M ). Ideally you should change filter parameters to hear only music, not voice.
