Fretboard Knowledge Clear Lessons Transcriptions Fretboard Knowledge Filters Categories Select a Category Lessons Transcriptions Fretboard Knowledge Filter Clear Filter Interval Master List (Infinite Harmonic Compass) Sale Price: $15.00 Original Price: $30.00 Sale Add To Cart Added! Triad Sets (C Major Only) Sale Price: $3.00 Original Price: $6.00 Sale Add To Cart Added! Triad Sets (all qualities and inversions) Sale Price: $12.50 Original Price: $25.00 Sale Add To Cart Added! No results found No results match your search. Try removing a few filters. Have Questions?