MuseScore 4 — Shortcuts, Tips & Merge Workflow

MuseScore 4 has no built-in Album/Join feature (it existed in MS2/3, not restored as of testing).

Community PowerShell script — combines full `.mscz` files sequentially (concatenates the raw staff XML from each score, inserting a barline + section/page break between each), rather than doing a manual copy/paste per instrument:

• Script + thread: https://musescore.org/en/node/305513 — look for the attached MusescoreCombine.txt in the thread (renamed from `.ps1` because the forum blocks script uploads directly — rename back to `.ps1` after downloading)
• Runs fine on Linux under PowerShell 7 (`pwsh`) unmodified — it's pure zip/XML text manipulation via built-in cmdlets, no Windows-only APIs and no dependency on the `mscore` binary itself
• Usage: `pwsh MusescoreCombine.ps1 file1.mscz file2.mscz file3.mscz …` — order = argument order, not filename or directory order. First file's header/style/instrument list becomes the whole merged score's. Output is `MergedSore.mscz` (script's own naming) in whatever directory you ran the command from.
• Preserves tempo/key/time-sig changes and ties correctly (raw XML concatenation), unlike manual copy/paste in the MuseScore UI, which drops tempo and key/time-signature changes across the paste boundary.
• Each inserted section break defaults to a 3-second pause between movements (MuseScore's normal section-break default) — if you don't want a gap, select the break → Properties → set “Pause before new section starts” to 0.
• Requires identical staff/instrument layout (same instruments, same order) across all input files.

Installing PowerShell (`pwsh`) on Ubuntu 24.04 — standalone `.deb`, no need to add the Microsoft apt repo for a one-off task:

POWERSHELL_VERSION=$(curl -s "https://api.github.com/repos/PowerShell/PowerShell/releases/latest" | grep -Po '"tag_name": "v\K[0-9.]+')
wget -qO powershell.deb "https://github.com/PowerShell/PowerShell/releases/latest/download/powershell_${POWERSHELL_VERSION}-1.deb_amd64.deb"
sudo apt install -y ./powershell.deb

If apt complains about `_apt` sandbox permission denied on the local file, move the .deb somewhere `_apt` can read first: ``sudo cp powershell.deb /tmp/ && sudo apt install -y /tmp/powershell.deb``. This usually means your home directory's permissions are blocking the `_apt` user from traversing into it.

Useful technique for confirming a merged/edited score's timing actually matches what MuseScore will play, without needing to reverse-engineer tempo/time-signature math by hand:

1. Solo the Metronome channel in the Mixer and export just the click track as WAV (see Playback section above).
2. Detect click onsets from the waveform (short percussive transients — a simple amplitude-threshold peak search works well; MuseScore's metronome accents downbeats at a measurably louder amplitude than other beats, which lets you segment the clicks into per-measure groups automatically).
3. Compare the click count per measure against the beats-per-measure implied by each measure's time signature in the score's XML — mismatches pinpoint exactly which measure has a structural problem (missing section break, unexpected pickup/irregular measure, etc.) far faster than guessing from the notation alone.