Cross-voice and cross-staff
arpeggios.
In the first bar, the <arpeggiate> elements all have the same
‘number’ attribute value, causing cross-staff arpeggios.
In the second bar, the elements in the two staves have different
‘number’ attribute values, causing the arpeggios to be connected
staff-wise.
In the third bar there are different ‘number’ attribute values for
each voice, causing arpeggios to be connected
voice-wise.102G2G2C521half1E521half1C521half1E521half14D422half1F422half1D422half1F422half1423half2G323half2B323half2C521half1E521half1C521half1E521half14D422half1F422half1D422half1F422half1423half2G323half2B323half2C521half1E521half1C521half1E521half14D422half1F422half1D422half1F422half1423half2G323half2B323half2light-heavy