One good choice is LALAL.AI, which is geared specifically for splitting audio files into vocal and instrumental tracks. The service lets you upload multiple files and supports a variety of file formats, and it processes files quickly with results in a few seconds. Stem options go beyond just vocal and instrumental tracks, though, with options for drums, bass and piano. Pricing tiers are geared for individuals and businesses, so LALAL.AI is good for musicians and content producers.
Another powerful service is AudioShake, which uses AI for audio separation in music, movies and user-generated content. It can recognize and separate audio elements up to 192kHz, and it has features for mixing, mastering, localization and captioning. AudioShake has different entry points, including AudioShake Live and AudioShake Indie, and offers demos and free trials so you can try out its abilities.
If you're a musician who wants more control over your audio, Moises offers a lot of features besides one-click vocal, drum, guitar, bass and instrument separation. It also offers a smart metronome, pitch shifting and real-time chord detection, for example, and is good for practice and creative projects. You can use the service on multiple devices, including web, mobile and iPad apps.
Last, Fadr offers a collection of AI-powered music tools that can help with creative music production. Its vocal remover and song splitter let you extract stems like vocals, bass, drums and melodies. The site also offers tools for remixing, mashup-making and tempo/chord detection, and offers both free and paid subscription plans depending on your needs.