Fair warning: It’s not magic, but it’s free. Save this for your next DIY karaoke night. 🎶
Select the bottom (right) track. Go to Effect > Pitch and Tempo > Invert . This flips its phase. audacity remove voice
Click the dropdown arrow on the track’s label (left side). Choose Split Stereo to Mono . You’ll now see two separate tracks (Left and Right). Fair warning: It’s not magic, but it’s free