OFFICIAL PAGE: AuDimix
AuDimix, from Global Delight, is an application for Windows 10 or Windows 11 which will split your audio into a total of five stems: Drums, Vocals, Piano, Bass and Backing Instruments. You can import your audio in MP3, M4A, WAV, WMA, AAC, or FLAC format and export your separated stems in MP3, WAV or M4A (AAC) file formats. You can purchase auto-renewable 6 month or 12 month subscriptions to use the application, or you can select a Lifetime one-time purchase option. Full details at the link above.
Screenshot courtesy of Global Delight Technologies Pvt. Ltd.