Mixer Update!

This update includes a mixer to balance your parts, play-from-here and looping, setlist sharing, drag-and-drop import, and a rebuilt audio engine.

New:
- Practice Mixer. Balance a score while you play. The mixer button beside the metronome opens per-instrument faders, pan, mute, solo, and live level meters, as a bottom sheet on iPhone and a full-width console on iPad. Your mix is remembered per score and never changes the file.
- Play or loop any passage. In View mode, touch and hold a measure and choose Play from here, or keep holding and drag across measures to loop them. Loops repeat without a gap, and mixer changes land on the next pass.
- Send an entire setlist as PDF, MuseScore, or MusicXML.
- Rename and delete setlists directly from the setlist row or overflow menu, and find them through library search.
- Drag scores in. Drop scores from Files or another app onto your library to import them.
- Change instruments. Tap an instrument name to swap it for the whole score, or from any measure onward.
- Flip stems. Flip the stem on any note or chord straight from the selection menu.

Improved
- Improved compatibility with MuseScore 4.7.5, including additional instruments, chord diagrams, and various other improvements.
- Improved MusicXML import and export for images, hidden notation, barlines, and chord diagrams.
- Combined setlist PDFs now include a table of contents, so you can jump straight to any score.

Fixed
- Scores saved in MuseScore's continuous view now open as pages instead of one very wide strip.
- Horizontal frames can now be selected and deleted.
- Fixed a bug where Score Setup showed default details instead of your latest edits.
- Guitar tablature from older MuseScore files now aligns correctly.
- Images placed in score headers now render correctly.
- Approaching the score with Apple Pencil now immediately enters note-entry mode.
- Selecting a measure now enters selection mode instead of note-entry mode.