Chord symbol △ should optionally be interpreted as Major 7 for playback

Your idea

I would like MuseScore Studio to provide an option for the jazz chord symbol △ (triangle) to be interpreted as a major seventh chord during playback.

In standard jazz notation:

C△ = Cmaj7 = C–E–G–B

MuseScore should provide an option allowing the triangle symbol alone to represent and play a Major 7 chord.

Problem to be solved

Currently, when using the triangle symbol alone, MuseScore can interpret C△ for playback as a simple C major triad:

C–E–G

instead of:

C–E–G–B

In jazz notation, the triangle is very commonly used as a shorthand for Major 7.

For example:

C△ → C–E–G–B
F△ → F–A–C–E
B♭△ → B♭–D–F–A
E♭△ → E♭–G–B♭–D

A jazz musician reading these symbols naturally expects a major seventh harmony.

Currently, we can use Cmaj7 or C△7, but many professional jazz charts simply use C△.

Prior art

The △ symbol is widely used in jazz chord notation to mean Major 7.

A possible solution would be to provide an option in MuseScore's chord symbol or playback preferences:

"Interpret △ as Major 7"

When enabled:

C△ → playback C–E–G–B

When disabled, MuseScore could retain its current behavior.

Ideally, the chord should also retain its Major 7 harmonic identity when transposing or exporting/importing MusicXML.

Additional context

No response

Checklist

• This request follows the guidelines for reporting issues
• I have verified that this feature request has not been logged before, by searching the issue tracker for similar requests

Start by tracing how chord symbols are parsed, converted into playback harmony, and exposed through chord-symbol or playback preferences. Check the existing handling of C△, Cmaj7, and C△7, including transposition and MusicXML import/export. Done means an option makes C△ play C–E–G–B while preserving the current behavior when disabled.