- Audacity: This free and open-source audio editor can be used to split a stereo track into two mono tracks, each containing one channel of the audio. The mono tracks can then be further processed to isolate the harmonies and music.
- Adobe Audition: This commercial audio editing software offers more advanced features for separating harmonies and music, including a dedicated "Decompose" tool.
- DeEsser: This online service uses artificial intelligence to separate the vocals and background music of a song.
- Moises: This online service allows users to upload a song and separate the vocals, drums, bass, and other instruments.
- iZotope RX 9: This professional audio editing software includes powerful noise reduction and isolation tools, making it well-suited for separating harmonies and music from a song.
The specific program or service that works best for you will depend on your individual needs and budget.