Learn music theory by ear
Reading alone isn't enough.
21 interactive tools and 47 articles. Diatonic chords, chord progressions, scales — learn by tapping and hearing.
Tap to preview — Pachelbel progression (I-V-vi-IV)
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Tap to preview — Pachelbel progression (I-V-vi-IV)
Tap to play
Step 1 — Which one are you?
Pick the shortest path to your goal.
neirocca offers two learning paths: for makers and for listeners. Choose whichever fits, you can switch later.
I want to start composing
A 6-step course to build chord progressions and melodies from scratch.
- Build the foundations: intervals, scales, diatonic chords
- Make progressions with the Chord Player and Builder
- Add melody lines on top with the Melody Note Guide
I want to listen and understand deeper
A 6-step course to hear how your favorite songs are actually built.
- Train your ear on intervals, scales, and diatonic chords
- Decode songs with Key Finder and Chord Finder
- Visualize key relationships on the Circle of Fifths
Step 2 — Start here
Three tools to try first
Diatonic Chord Reference
Pick a key and see all 7 chords used in that key. Tap to play, color-coded by tonic / subdominant / dominant.
Open this toolChord Progression Player
20 classic progressions — Pachelbel, Royal Road, etc. Switch keys, tempo and instruments to compare.
Open this toolScale Dictionary
Major, minor, pentatonic and 4 more — visualized on both piano and guitar, with ascending and descending playback.
Open this toolStep 3 — All tools
Browse all 21 tools
Grouped by theme. Tap any card and sound plays right away.
Articles
Learn theory by reading
What Are Diatonic Chords?
How the 7 chords usable in a key are built.
Read PopularTop 10 Essential Chord Progressions
From pop to jazz — the progressions you'll hear everywhere.
Read NewWhat Is Scale Conversion?
Map the same melody onto different scales and feel the mood shift.
Read Pairs with courseWhat Is the Circle of Fifths?
Visualize key relationships and get comfortable with modulation.
Read