Co-chair meeting minutes: March 27, 2025

MNX

Further to our discussions in the previous meeting, Adrian has made the changes to the specification for accidentalDisplay per discussion #366. The linked comment provides links to the relevant specification changes.

We discussed Robert Patterson’s proposal to move ottava to part.measure (issue #413) and we found ourselves in broad agreement. We think ottava should move from sequence to part.measure and provide an array of octave lines, specifying the direction and number of octaves shifted, the optional voice to which it applies, and the start and end positions, specified using measure rhythmic position (which specifies both the measure, and the rhythmic position within the measure, including the index into any run of grace notes at that position).

In the process of looking at this, we discovered that slurs do not use measure rhythmic position, but Adrian will review the way that slurs are positioned, and remove the location object altogether, since our expectation is that this will prove redundant once the start and end position is specified more fully.

We also discussed issue #412, and ended up coming to the consensus that dynamic should also move from sequence to part.measure, so that dynamics apply to all sequences by default. Like octave lines, they can target a specific voice, and also specify an optional staff to determine where they appear.

With regard to discussion #410, after some discussion, we resolved that we would retain the existing event.markings structure as currently specified, on the grounds that it’s important that the markings themselves can be objects with additional information about their appearance, placement, and so on.

Next meeting

The next co-chairs meeting is scheduled for Thursday 10 April 2025.