Every song has four tracks. They're plain MP3s — tap play, no login needed. No looping, no speed slider, no sheet music. For the full practice tools, use the Soundslice page.
Work your way down. Start with Half Vox (half vocals — melody still guiding you). Move to Ghost Vox (faint vocals — you're carrying the tune). Then Karaoke (no vocals — you're on your own). Full Mix is the reference recording.