An interval is the distance between two notes, and recognising intervals by ear is the foundation of everything else in ear training: melodies are chains of intervals, chords are stacks of them, and a key is a set of intervals measured from one home note. Musicians who play by ear are not born hearing a "major sixth"; they have attached a name to that sound often enough that it comes back on its own. This routine is designed to get you there faster than random drilling.
Why random drilling fails
The usual approach is to open a trainer with all twelve intervals switched on and start guessing. Two things go wrong. First, the ear has no anchor: with twelve options and no strategy, every answer is a coin toss and the feedback teaches nothing. Second, most people practise in long, occasional sessions. The ear consolidates between sessions, during sleep, so ten minutes a day beats an hour on Sunday every time.
The routine below fixes both: it introduces intervals in an order the ear can separate, gives each one a hook you already know, and keeps sessions short.
Step 1: two intervals, comparison only
Start with the octave and the perfect fifth. They sound nothing alike, which is the point: you are teaching your ear to notice that intervals have a character at all.
Use comparison mode first. The trainer plays two intervals and asks which is larger. You are not naming anything yet, just hearing size. When you are right nine times out of ten, add the major third. Now you have small, medium and large.
Step 2: attach a song to each interval
Every interval opens a song you already know. Sing the first two notes of the song and you have the interval. Reference songs work because they are stored in long-term memory; you are borrowing a recall you already have.
| Interval | Ascending reference | Descending reference |
|---|---|---|
| Minor 2nd | "Jaws" theme, "Für Elise" opening | "Joy to the World" |
| Major 2nd | "Happy Birthday", "Frère Jacques" | "Mary Had a Little Lamb" |
| Minor 3rd | "Greensleeves", "Smoke on the Water" | "Hey Jude" |
| Major 3rd | "Oh When the Saints", "Kumbaya" | "Swing Low, Sweet Chariot" |
| Perfect 4th | "Here Comes the Bride", "Amazing Grace" | "I've Been Working on the Railroad" |
| Tritone | "Maria" (West Side Story), "The Simpsons" | "Even Flow" |
| Perfect 5th | "Twinkle Twinkle", "Star Wars" | "Flintstones" |
| Minor 6th | "The Entertainer" (opening) | "Love Story" theme |
| Major 6th | "My Bonnie Lies Over the Ocean" | "Nobody Knows the Trouble I've Seen" |
| Minor 7th | "Somewhere" (West Side Story) | "Watermelon Man" |
| Major 7th | "Take On Me" | "I Love You" (Cole Porter) |
| Octave | "Somewhere Over the Rainbow" | "Willow Weep for Me" |
Pick one song per interval that you can genuinely sing; the list is a menu, not a syllabus. Over time you will stop needing the song, the way you no longer spell a word letter by letter.
Step 3: identification, in a deliberate order
Now switch to identification mode, where the trainer plays one interval and you name it. Add intervals in this order, one new interval each time your accuracy on the current set stays above 80% for three sessions:
- Octave, perfect fifth, major third (from step 1)
- Perfect fourth (often confused with the fifth; sing up to the fifth from the lower note and see whether you overshoot)
- Major second and minor second (the steps; the minor second is the tense "Jaws" sound)
- Minor third (compare against the major third directly, they are the two moods of a chord)
- Major sixth and minor sixth
- Minor seventh and major seventh
- Tritone last; it is the odd one out and easy once everything else is in place
Practise ascending first. Then descending, which sounds different to the ear and needs its own reference songs. Then harmonic, both notes at once, which is the form you meet in chords.
Step 4: ten minutes, every day
A session looks like this:
- 2 minutes: sing the reference song for each interval in your current set, then sing the bare interval without the song.
- 6 minutes: identification drills on the current set. Answer fast; a slow, deliberated answer trains deliberation, not recognition. When you miss, the trainer plays the right answer; sing it back before moving on.
- 2 minutes: one interval from the next stage, in comparison mode, so it is familiar before it becomes a test.
Track your accuracy per interval, not overall. The one you keep missing is the one to sing more. The ear training tool keeps this record for you, per area and per level, so you can see which intervals still trip you up.
Step 5: take it into real music
Drills teach recognition in isolation; music happens in context. Twice a week, replace one drill session with this:
- Put on a song you know and name the interval between the first two melody notes. Then the next two. Check on a keyboard or the virtual piano.
- Sing the bass line of a chorus and name the intervals between chord roots. A jump up a fourth and back down is the most common move in pop; you will start hearing it everywhere.
- Run the song through the chord analyzer and check your root movements against the detected chords.
The moment recognition becomes useful, when you catch a melody by ear because you heard "that's a sixth", motivation stops being a problem.
Common sticking points
Fourth versus fifth. Sing the lower note, then sing up a fifth using "Twinkle Twinkle". If the interval you heard is smaller than that, it is the fourth.
Sixths and thirds. A sixth is an inverted third and shares its sweetness. If an interval sounds like a third but too wide, try the sixth.
Sevenths. Both sevenths feel unresolved. The major seventh is bright and stretched ("Take On Me"); the minor seventh is softer and bluesy.
Harmonic intervals. When both notes sound together, sing the top note, then the bottom, then treat it as a melodic interval. This gets faster with practice until you skip the step.
How long does it take?
With ten minutes a day, most learners reliably identify all ascending intervals within four to eight weeks, and harmonic intervals a few weeks after that. Missing days costs more than short sessions gain, so protect the habit before the duration.
When intervals are automatic, chords are next: a chord is two or three intervals heard at once, and identifying chord progressions by ear builds directly on what you have just trained. Lesson 6 of the theory course covers the scales and intervals themselves if you want the theory behind the sounds.