$9.99 Pitch Class Set Exercises: Trichord Sequence exercises for pitch class set 013679 quantity Add to cart Category: Instrumentalists Description Description Digital Downloads are Non-Refundable Related products Pitch Class Set Theory Course Bundle $39.99 Add to cart Get the Two Note Modal Sequencing Course $29.99 Add to cart Rhythms Volume Two Digital Copy $19.99 Add to cart MY MUSIC: Application of 12 Tone Techniques Digital Copy $9.99 Add to cart