How does custom instrument splitting work?

Choose the custom prompt option, then describe the sound you want to isolate, for example "saxophone," "synthesizer," "electric guitar," "crowd noise," or "music with vocals." SAM Audio uses that description to separate the matching layer from the mix.

For difficult sections, open the track in Studio and mark the time span where the target sound is easiest to hear. You can start from SAM Audio Online or the Universal Stem Splitter.