$9.99 Pitch Class Set Exercises: Trichord Sequence 2 exercises for pitch class set 013679 TWO quantity Add to cart Category: Instrumentalists Description Description Digital Downloads are Non-Refundable Related products Single String Studies for Guitar Volume One $11.99 Add to cart One Minute Lesson Phrasing $24.99 Add to cart Essential Scales: Core Study Material for Any Instrumentalist $19.99 Add to cart Pitch Class Set Theory Course Bundle $39.99 Add to cart