This randomly generated multichoice quiz tests your knowledge of chromatic post-tonal fundamentals (pitch-class integers, ordered pitch intervals, and interval classes).
- Pitch-class integer: numerical index of a pitch-class, with C=0 up to B=11
- Ordered pitch interval (OPI): the number of semitones between two ordered pitches. A negative number indicates a descending interval.
- Interval class (IC): the smallest number of semitones between two unordered pitch-classes (between 0 to 6)
The test is timed from when you start. You should be aiming to complete this test in under 4 minutes.
0–2 mins = Professional 2–4 mins = Good 4–6 mins = Average 6–8 mins = Sluggish 8 mins or more = Too slow.