The <double> element
If the <double> element is present, it indicates that the music is doubled one octave from what is currently written.
|above||yes-no||No||If the above attribute is set to yes, the doubling is one octave above what is written, as for mixed flute / piccolo parts in band literature. Otherwise the doubling is one octave below what is written, as for mixed cello / bass parts in orchestral literature.|
This element is used in the following examples: