- Just Intonation Explained By Kyle Gann 1. How Fractions Denote Pitches 2. How to Play with Intervals 3. How Is This Different from Our Normal Tuning 4. What Do Pure Intervals Sound Like An Introduction to Historical Tunings - a whole other subject Anatomy of an Octave: a reference chart of several hundred intervals within an octave 1. How Fractions Denote Pitches In the notation of ...home.earthlink.net/~kgann/tuning.html