Most of the leaves contain on each page seven staves of music. The notation and the character of the music in this volume is the same as in MS Dd.2.11. The music is generally harmonized, in which case the staves contain six lines; when only the melody is given, the staves contain five lines only. On leaf 64 there is a melody written in a later hand and in the more modern notation of breves, minims, etc. On leaf 66 there is an index headed 'Lessons in this book'. The airs or melodies are termed 'trebles'.