Sorry for all the messages, but I do want to address Jack Campin's assertion that somehow my custom annotations are going to pollute the pool of ABC tunes.

All of my custom annotations for things like reverb, swing, and ornamentation rendering settings used for playback are done using ABC comment based syntax. To every other ABC tool, they are No-ops.

There is zero chance of them interfering with other ABC tools, they will just ignore them.

Additionally, these custom features really are enhancements not addressed in the ABC standard for example, dealing with some of my custom playback reverb settings options, setting timing parameters for Irish roll rendering, or adding hyperlinks to tunes. My custom comment-based annotations were my way of dealing with this in a "do no harm" way.