Free online interval ear trainer

Ear training is learning to recognise what you hear — and recognising intervals, the distances between two notes, is where it starts. It is the skill underneath playing by ear, working out a song without sheet music, and improvising, because once you can name the distance between notes you can find them on your instrument. This trainer plays two notes and asks you to name the interval, building that recognition one repetition at a time. Below is how it works and how to improve quickly.

How it works

Press play to hear an interval — two notes, one after the other. Choose the interval you think it was from the buttons, and you will see straight away whether you were right before the next one plays, with your score tracking progress. Replay any interval as often as you need; hearing it several times while you decide is part of the learning, not cheating.

You are training relative pitch, not perfect pitch

A common worry is that ear training needs perfect pitch — the rare ability to name a note with no reference. It does not. This trains relative pitch: hearing the relationship between notes rather than their absolute value. Relative pitch is what almost all working musicians actually use, and unlike perfect pitch it can be developed by anyone with practice. That is why the trainer plays intervals from different starting notes — you are learning a sound-shape, not a fixed pair of pitches.

What an interval is

An interval is the gap between two notes, named by its size and quality — a major third, a perfect fifth, an octave. The crucial point for ear training is that the same interval sounds the same wherever it starts: a perfect fifth up from C sounds like the same leap as a perfect fifth up from G. If you want to see and hear intervals side by side before testing yourself, the interval finder shows both notes on the keyboard and plays them, which is a good way to fix the sound before it goes behind the buttons here.

The song-anchor method

The fastest way in is to tie each interval to the opening of a song you already know by heart. When you hear a mystery interval, hum up from the lower note and see which tune it launches into. Reliable anchors include:

• Minor third — “Greensleeves” or the opening of “Smoke on the Water”.
• Major third — the first two notes of “When the Saints Go Marching In”.
• Perfect fourth — “Here Comes the Bride”.
• Perfect fifth — “Twinkle, Twinkle, Little Star”.
• Octave — the leap that opens “Somewhere Over the Rainbow”.

Play an interval, hum the matching song, and the distance quickly starts to stick without conscious counting.

Ascending, descending, and harmonic

An interval played low-to-high sounds different to the ear than the same interval played high-to-low, and different again when both notes sound together. It is worth practising all three, because a descending fifth will not trigger the same song anchor as an ascending one. Start with ascending intervals, since most anchors are ascending tunes, then work on descending ones separately once the ascending version is secure.

Consonance and dissonance as a clue

Before you name an interval exactly, its general character narrows the field. The octave and perfect fifth sound open and hollow; thirds and sixths sound sweet and full; seconds and sevenths sound sharp and clashing; and the tritone sounds distinctly restless. Sorting a mystery interval into “smooth” or “tense” first, then choosing within that group, is more reliable than trying to name it from nothing — the same listen-for-the-colour approach that works for chords.

Interval inversions

Intervals come in related pairs. Turn a perfect fifth upside down — move the lower note up an octave — and it becomes a perfect fourth; a major third becomes a minor sixth. Each pair adds up to an octave, and hearing that kinship helps: if you can recognise a fifth, its inversion the fourth is only a short step away. Recognising these relationships is quicker than treating all twelve intervals as unrelated sounds to memorise separately.

From intervals to real music

The point of all this is not the quiz; it is being able to use your ear on actual music. Once you can name intervals reliably, you can transcribe a melody by hearing each leap between notes, work out a bass line, or find the notes of a riff on your instrument without sheet music. It is the first rung of playing by ear, and everything above it — following chord changes, improvising a line that fits — rests on this same skill of hearing distance.

Why relative pitch is the skill that matters

Perfect pitch gets the attention, but relative pitch does the work. A musician who can hear that a melody leaps up a fourth can play that melody in any key, transpose it on the spot, and follow along with other players — none of which requires naming notes in the abstract. Because it is a learned skill rather than an inborn one, every rep here is genuinely building an ability you will use, not merely testing something fixed. That is worth remembering on the days progress feels slow.

Widening the range

Start with intervals inside a single octave, but be aware that music leaps further than that. A distance larger than an octave — a ninth, a tenth — is a compound interval, and by ear it behaves much like the smaller interval an octave down: a ninth resembles a second, an eleventh a fourth. Once the intervals within an octave are secure, recognising the wider leaps is mostly a matter of subtracting the octave and naming what is left.

How to improve

Begin with just a few intervals you can already tell apart — say the octave, the perfect fifth, and the major third — and only add harder ones once those are automatic. Trying to learn all twelve at once tends to stall; a small, solid core that grows is faster. Ear recognition also builds far better in short, frequent sessions than in occasional long ones, so a few minutes a day beats a weekly marathon. When intervals feel comfortable, the natural next step is the chord ear trainer, since chords are built from stacked intervals, and playing the notes on the virtual piano helps you connect a sound to a shape you can see.

Ways to practise with it

• Learn a song anchor for each interval, then use it to identify what you hear.
• Master a few intervals fully before adding more, rather than juggling all of them at once.
• Practise ascending and descending versions separately — they do not sound the same.
• Keep sessions short and frequent; the ear improves with regular reps.