*Notes*
- The system (c.1500-1800) is based on three overlapping ’hexachords’ of six syllables - do re mi fa sol la.
- In order to change from one hexachord to another, the singer needs to ‘mutate.’
- The manner by which one mutates is by adopting ‘re’ of the new hexachord when ascending and ‘la’ when descending.
- In order to sing in different keys and clefs, the singer imagines the ‘do’ in several different places on the stave.
Giovanni Maria Bononcini, Musico Prattico (Bologna: Giacomo Monti, 1678).
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