ToneBytes unveils GLS!, a FREE Vocal Removal effect for Windows that could be handy.
Features:
GLS! is well suited for music with good stereo separation and a dry vocal, slightly worse for a wet vocal, and not suitable for mono tracks. However wet vocals can also be slightly muted by narrowing the stereo before processing.
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"GLS!* — is an virtual effect plug-in which allows you to remove vocals from songs. It works on the principle of ‘central channel subtraction’, where singer’s voice is usually located." ToneBytes