Tremolos

[joeberkovitz]

This issue notes the need for tremolos, including single- and multiple-note tremolos.

MusicXML's handling of multiple-note tremolos is quite complex and involves time-modification elements. This should be looked at carefully, since MNX-Common doesn't need a time-modification element for tuplets and may not need one for tremolos either.

[adrianholovaty]

Single-note tremolos are now supported: https://w3c.github.io/mnx/docs/mnx-reference/objects/tremolo-single/

Here's an example document: https://w3c.github.io/mnx/docs/mnx-reference/examples/single-note-tremolos/

I'll leave this issue open for the yet-to-be-done case of multi-note tremolos.