What you get from an acapella extractor
An acapella is the voice with nothing underneath it. DJs, remixers and mashup artists traditionally relied on labels to release official acapella files, which are scarce and often missing for the song you want. A neural separator reconstructs one from the finished stereo mix instead.
The result is a single audio file containing everything the model hears as singing: lead vocal, doubles, harmonies and ad-libs. It follows the original timing exactly, so it drops back onto the original tempo grid in your DAW.