( ( "perf. 4 below C3" ) ( "G2" ) ( "C3" "1" "5a. HOW TO SPELL A PERFECT FOURTH OR FIFTH" "Begin with letter note-name in octave and count 4 or 5 letter note-names up or down as requested. Spell added note in interval so that lower note = tonic and upper note = 4th (or 5th) scale-step of a major scale." "60" ) )