A music theory library you can hear
Theory written down,
played back,
printed out.
A reference library built from Wikipedia and Wikidata, not written by AI — worksheets generated fresh from real music theory, and the ear-training a textbook can't give you.
C4 to G4 — seven semitones, the interval every tuning system is built around. Train your ear on all thirteen →
111 articles 11,986 composers 3,887 notable works 2,934 genres & styles 107,800 worksheet sets
Ten centuries, one staff.
Every era in the library has a composer standing at its barline, dated from Wikidata. Click a name, or a barline, and keep going.
Three ways in, and they point at each other.
A definition tells you what a cadence is. A worksheet makes you spell one. Only your ears can tell you when you have heard one. Each page here links to the other two.
Read111 articles
Full Wikipedia articles, not summaries, with the source article linked on every page.
Hearin the browser
Tones synthesised as you go — nothing to install, no sign-up, and the answer written on the staff every time.
Print107,800 sets
Every set is ten questions with an answer key, generated fresh — so a class can each have a different sheet on the same skill.
Every worksheet is engraved, not typed.
One generator writes ten fresh questions per set and lays each one on a real staff — no scans, no clip-art noteheads. This is question 3 of an actual set, live on this page.
Scales · Major · Easy · Set 1 · Question 3
Write the C major scale
Answer: C - D - E - F - G - A - B - C
Cut by where, not just when.
The same 14,920 biographies and genre articles, by country of citizenship and by musical family.