Rehearsal Mode turns the cori app into a music stand: when you tap a song or a setlist, the sheet music opens full screen instead of the player. For rehearsal you can set dark sheet music for low light, and after the last page of a piece cori can turn straight to the next title in the setlist if you like.
Switching to Rehearsal Mode
- Find the switch
At the top of the home screen, next to the greeting, there's a switch with a microphone () and an open book (). You'll find the same switch at the top of every setlist.
- Switch over
Tap the switch until the book is active. The book stands for Rehearsal Mode, the microphone for Practice Mode. The first time you switch, cori briefly explains what changes; after that a short message confirms "Rehearsal Mode" or "Practice Mode". If a song is playing, playback stops.
- Open a song or setlist
Tap a song: its sheet music opens full screen. If it isn't on your phone yet, the first tap downloads it. If you tap a setlist, the sheet music starts with its first title; in the setlist, the round button with the book opens the sequence from the beginning, and a tap on a song opens it at that point.

The rehearsal view
There's a bar at the top; a tap on the sheet music hides it and shows it again. While the view is open, the screen stays on. From left to right you'll find:
- the list of all titles in the setlist, with up and down arrows; a tap on a title jumps there,
- the text icon, which switches between sheet music and lyrics if a song has both,
- the graduation cap (), which switches between the members' and the conductor's sheet music if both exist; the choir leadership starts with the conductor's sheet music,
- piano () and metronome (), described in Using the metronome and overlay piano,
- on the far right, the cog for the settings and the ✕ to close.
You can turn pages with your finger or a Bluetooth foot pedal. At the bottom, above the sheet music, the eye button shows or hides annotations, and the pen opens the drawing toolbar (see Annotating sheet music). Breaks, announcements and custom entries in a setlist appear as a page of their own with their title and text.
Adapting the sheet music to the rehearsal
The cog opens three switches. They apply to all songs until you change them again:
- "Dark sheet music": "Inverts the colors of the sheet music, easier on the eyes in low light". The sheet music appears light on a black background, and the whole view turns dark. This helps in a darkened rehearsal room and on stage.
- "Advance automatically": "Jump to the next title after the last page". If you turn back on the first page, you get to the previous title. The switch is on to begin with. Switch it off if you don't want to turn on by accident at the end of a piece; then you change titles via the list.
- "Scroll vertically": "Scroll through the sheet music continuously instead of paging sideways".
cori suggests Rehearsal Mode
If one of your appointments is currently running and you've never used Rehearsal Mode, cori shows a hint at the switch on the home screen: "Your appointment is happening now", with the question of whether you'd like to switch to Rehearsal Mode now. "Yes" switches over immediately, "No" closes the hint. An appointment counts as running from ten minutes before the start until ten minutes after the end. The hint only appears once.
Back to Practice Mode
Tap the switch again until the microphone is active. Then a tap on a song plays the recordings again, and sing-along is available again. What sets the two modes apart is compared in Playback mode vs. Sheets mode.
If it doesn't work
- No switch on the home screen: parents who don't sing in the choir themselves don't see it. If the choir has no subscription and the trial is over, the home screen shows the subscription notice instead of the switch.
- A song is missing from the setlist sequence: it isn't on your phone yet. Download it, and it appears.
- Instead of sheet music, the lyrics or "No PDF or text available" appear: the song has no sheet music. If it says "Only sheet music for choirmasters available", there's only the score for the choir leadership; the button below opens it.
- cori doesn't turn on at the end of a piece: "Advance automatically" is off, or you're on the last title. Then the list opens.
- The "Your appointment is happening now" hint never came: it only appears as long as you haven't used Rehearsal Mode yet. Under SettingsTutorials and HelpShow tips again you reset all hints.
What's next?
- Writing on the sheet music: Annotating sheet music
- Beat and notes in rehearsal: Using the metronome and overlay piano
- Preparing the sequence for rehearsal: Managing setlists
- The two modes compared: Playback mode vs. Sheets mode