For a software that can change the pitch of a song without changing the tempo and that can identify chords in real-time, Moises is a great option. This AI-powered audio manipulation and separation tool lets musicians do a range of things, including changing the pitch, detecting chords in real-time and using a smart metronome. It also can separate instruments and run on multiple devices, so it's good for drummers, singers, bassists, guitarists and producers.
Another powerful option is Fadr, a web-based service that offers AI-powered music tools for creative music production. Fadr offers tools for detecting key, tempo and chord, as well as remix and mashup creation. It also can extract stems for vocals, bass, drums and melody, so it's good for song separation, remix creation and live performances.