Build your own ear drill
Choose which intervals you want, how they are played, which sound and which octave. The drill is built here, in your browser, and stays on this device.
How many rounds a session runs is not part of a drill: it comes from the session length picker above, which every exercise on the site follows.
A drill you build here is not recorded on your progress page. Progress is kept per exercise, and this one is yours rather than the site's — counting it would inflate your totals for something that appears in no list, and average sessions from settings with nothing in common.