Specific to each note. You can use it to position the notes on a virtual keyboard for example. Total time in ms for which the note has existed. Total time in ms that the note was played for. Text between a section marker is interpreted by 3DMidi as belonging to that section.
All sections are optional.
If 3DmiDi does not encounter a marker for a specific section, it will ignore it. This is where to put you scene initialisation, such as camera, light and background setup for example. Put the script for your object here. Of course the keywords will be replaced with different values for each note. The next example uses the header and footer features.