A description of how to encode ottava marks in **kern spines.

Ottava marks can be encoded in Humdrum **kern data by starting the mark with the tandem interpretation *8va and ending it with the interpretation *X8va:

Notes under the ottava mark are encoded at sounding pitch, not an octave lower as seen in the printed music. Try removing the *8va/*X8va tandem interpretations in the above example to display notation like this:

Ottava bassa


Two octaves up/down can also be encoded with quindicesima marks (with a perfect 15th being the interval of two octaves).