Hi,
Can Audacity be used to remove a specific guitar from an existing uploaded song so that I may play that guitar section.
Thank you.
Probably not.
If the guitar is in the center of a stereo recording you can remove it (along with everything else in the center) with the [u]Vocal Reduction and Isolation effect[/u]. Or, if it’s panned fully-left or fully-right you can silence one channel and make a mono recording (which will play out of both speakers).
“You can’t un-bake a cake or un-fry an egg, and you can’t un-mix sound.”
The whole reason that pros do multi-track recording is so that every voice-instrument can be adjusted/processed/edited/re-recorded separately before mixing.