MusicXML Score Viewer
Features
Everything a rehearsal leader needs.
Opusis combines score viewing, real-time sync, recording, and async review in one room-centric workflow. No score editor, no DAW—just rehearsal.
Leader Control
Leader-Led Sync
When a leader presses Play, Stop, or seeks to a new measure, every participant's view jumps to the same position automatically.
Conductor Pointer
Co-leaders can broadcast a position marker across all screens to draw attention to a specific measure mid-rehearsal.
Section Leader Role
Assign co-leaders who can take over playback control during split rehearsals, so section practice runs in parallel without the main leader.

Score & Playback
Tempo & Key Control
Leaders adjust tempo and transpose key for the entire room in real time. Participants always see the current value without refreshing.
Measure Loop
Set a start and end measure to loop. Ideal for drilling a difficult passage without stopping to rewind.
Part-Focused View
Each participant selects their own part. The score dims other staves so you can concentrate on your line while still seeing the full context.
Room & Session
Ensemble Rooms
Each room holds its own score library, member roster, notes, and session history. Everything your ensemble needs lives in one URL.
Invite by Link
Share a room link and participants join immediately—no account required for the first session. Leaders control who stays as a permanent member.
Session History
Every live session is logged with date, duration, tempo range, and which measures were covered. Leaders can review what was practiced last week.
Follow / Independent Mode
Participants choose to follow the leader's position or navigate the score independently. Switching modes is instant and does not disrupt others.
Async & Recording
Personal Recording
Participants record their own take locally while the score plays. Recordings are tied to the exact measure range and tempo.
Assignment Workflow
Leaders create assignments for specific measures. Members submit takes that the leader can review and annotate asynchronously.
Session Reports
Ensemble plan and above includes per-session attendance, tempo log, and loop coverage reports—so leaders can see progress over time.
Where rehearsals become works
Create your ensemble room now.
Free during beta. Upload a score and invite your team, and from your next rehearsal you can play together right away.