Noize - Separate songs into stems and practice hands-free

Hi Product Hunt! 👋 I built Noize because practicing along with a finished song is often harder than it should be. Sometimes you want to hear only the drums, remove the guitar, repeat one difficult section, or bring an instrument back in while you’re playing — without constantly touching your phone. Noize separates a song into individual stems directly on your iPhone, including vocals, drums, bass, guitar, piano and other instruments. From there, you can mute tracks, loop sections, add flags, slow the song down, and build a practice session around the original recording. One of my favorite additions is Face Control. You can assign facial gestures such as raising your eyebrows, winking, or moving your head to individual tracks, then enable or disable them while your hands stay on your instrument. The separation and face tracking happen locally on the device. No song uploads are required. I’m building Noize around a simple idea: the original song should become something you can interact with while you practice, rather than something you can only play back. I’d love to hear how musicians would use it in their own practice sessions.