iDoctor Live Stems turns your iPad or iPhone into a stage-ready multitrack player. Load up to 6 stems per song, hit PLAY and every track starts sample-locked. Each track has its own fader, mute, solo, pan, meter, waveform, color and an independent physical output to your USB-C multichannel interface: click and cues to the band's in-ears, the mix to the PA. BUILT FOR THE STAGE • Host-clock synchronized start: no drift between tracks, not even when seeking or looping. • Console-style mixer with long faders, live VU meters, protected gain and per-track lock. • Timeline with waveforms, draggable playhead, section markers (create, edit and jump with GO TO) and per-section track automation. • Seamless A-B loop/vamp to stretch a section until the band is ready. • Full-width on-screen lyrics with autoscroll, manual scroll and pinch zoom. • Real-time pitch ±12 semitones and tempo 50–150%, remembered per song. • Count-in, setlist auto-advance and chained medleys with crossfade. YOUR OWN RECORDED CUE TRACK • Add a recording track, arm the mic and record your spoken cues in sync with the song, watching the waveform draw live. • Record in one pass or in parts, with automatic latency compensation, take undo/redo and full editing in a full-screen audio editor: silence, crop, gain, fades, shift and export to WAV or M4A. • Route it only to the in-ears: the audience never hears it. • Built-in automatic latency calibration and precision test: your takes land exactly where you sang them. TRUE MULTICHANNEL ROUTING • Global or per-song output matrix: each track to its stereo pair or mono to a specific physical channel, with a test tone per output. • Works with class-compliant USB-C interfaces (iConnectivity, Zoom, Universal Audio…). Without an interface, it plays in stereo over the speaker or AirPods. YOUR LIBRARY, SAFE • Automatic file verification and repair: SHA-256 integrity and restore from iCloud when a local file goes missing. • Rotating ZIP backups (plus weekly automatic), visible in the Files app. • Automatic sample-rate conversion on import, drag & drop from Files or Finder, and stereo mix export to WAV. GIG-READY • Setlists with their own order, notes, per-setlist chained medleys and one-tap start. • Preflight: checks stems, integrity, channels, battery and temperature before you go on. • Concert mode (screen stays on), resume after a crash, persistent show log and interruption handling. • MIDI pedalboard (Bluetooth or USB): play, stop, sections, vamp and panic with your foot. • Remote control from a second iPad/iPhone, Apple Watch support and a backup iPad with hot takeover. • Optional iCloud sync (complete songs, audio included) and backup to your own cloud via Files. AirDrop complete songs between devices. • Built-in manual, available in English, Spanish, German and French. • Also on your Apple Silicon Mac (Designed for iPad), with drag & drop from Finder. iDoctor Live Stems is a musical performance tool, part of the iDoctor Music Tools ecosystem. It is not a medical app. No accounts, no ads, no data collection.