Free · No signup required
Free Online Ear Training
Hear the interval. See its shape. Remember it forever.
Most apps make you guess in the dark. TerryTrilla shows you exactly what you're hearing — as geometry on an interactive Scale Circle.
What is ear training?
Traditional ear training teaches you to guess. You hear a sound, pick from multiple choices, get a score. Repeat until it sticks. This works — but it's slow, and it doesn't explain why an interval sounds the way it does.
TerryTrilla takes a different approach: see what you hear. Every interval has a shape on the Scale Circle. Every chord is a specific constellation. When you see the structure at the same moment as you hear it, understanding comes in seconds instead of months.
Try it now
See what you hear
Click any note. Explore how different scales form different shapes — and how rotating the same shape just transposes the key.
What will you train?
A complete ear training system — from simple intervals to complex modal structures.
Intervals
Recognize every interval from minor second to major seventh — by ear and by sight. Each interval has a distinct arc on the Scale Circle: see it the moment you hear it.
Chords
Train chord recognition — major, minor, diminished, augmented and beyond. See the chord as a constellation on the circle while you hear it. 200+ chord types.
Scales & Modes
Recognize scales by their shape. Major is a 7-pointed asymmetric star. Pentatonic is a clean 5-pointed shape. Once you see the geometry, you never forget it. 1,247 scales.
Functional Hearing
Understand why chords feel tense or resolved. The Scale Circle shows Tonic, Subdominant and Dominant zones for any scale. Train your ear to feel harmonic function.
Why does seeing the music help?
Music theory has been taught through notation for 300 years. Notation is great for recording music — but it was never designed for understanding it. When C Major and D Major look completely different on a staff, your brain treats them as different objects and tries to memorize each one separately.
On the Scale Circle, transposition is rotation. C Major and D Major are the same star, turned two positions. Your brain sees this spatially, immediately. You stop memorizing and start recognizing the underlying structure.
The same applies to intervals: a major third is always the same arc — warm and stable. A tritone is always the arc exactly opposite the tonic — dramatic and tense. Once you associate sound with shape, recognition becomes effortless.
Frequently asked questions
Most musicians notice real improvement within 3–4 weeks of consistent daily practice (10–15 minutes). With TerryTrilla's visual approach, many users understand scale structures in their first session — because seeing the geometry makes it immediately intuitive.
Absolute pitch is very rare and largely innate. However, relative pitch — recognizing intervals and scale degrees in context — is fully trainable and it's what professional musicians actually use. TerryTrilla focuses on relative pitch through visual and functional training.
No. TerryTrilla is designed for musicians who learn by ear — guitarists, pianists, producers. The visual approach replaces notation with geometry that anyone can read instantly.
Yes — the Scale Circle and basic exercises are completely free with no signup. A free account adds progress tracking and achievements. Paid plans unlock the full 1,247-scale database, AI assistant and notation editor.