In IntervalPhobia, you will see/hear most of the intervals from pefect unison to perfect fifteenth. Our ear training software, Phobia series, has been used world wide and designed for aspiring musicians and music major students. These interactive training will help developing essential listening skills on common musical subject such as chords, chord inversions, intervals, and scales. Interval Roots: C, C#/Db, D, D#/Eb, E, F, F#/Gb, G, G#/Ab, A, A#/Bb, and B. Intervals: PU, m2, M2, m3, M3, P4, TT, P5, m6, M6, m7, M7, P8, m9, M9, m10, M10, P11, CTT, P12, m13, M13, m14, M14, and P15. Play Modes: Interval Dictionary, Training, and Lesson. Note Orders: Chord (simultaneous), Ascending, and Descending. Interval Display: e.g. 1-3, PU-M3, C-E. Piano Keyboard View. Grand Staff View.