About Tonic

Tonic is a personal, non-commercial project for understanding how music actually works — built for the adult learner who wants the ideas behind the notes, not a pile of facts to memorise.

What it is

A free, non-commercial learning project. No account, no sign-up, no ads. Anything it remembers — your placement result, which sections you have visited — is saved only in your own browser; see the Terms & Privacy page for the details.

The idea behind it

Most music theory is taught as a long list of separate topics: note names, scales, key signatures, chords, intervals. You can learn fifty of those things and still not feel you understand music. Tonic takes the opposite approach. It teaches the small number of engines — the patterns that produce nearly everything else:

• one tone–semitone pattern behind every major scale;
• one stack of thirds behind every basic chord;
• the relative relationship that links major and minor;
• the home–away–return pull that gives music its sense of motion;
• the pulse and subdivision behind rhythm and time;
• the stave as a coordinate system rather than a set of positions to memorise.

Once you see those, the rest stops being a list and starts being detail built on a few clear ideas.

Who it’s for

An intelligent adult who is learning the piano, or returning to it, and wants to genuinely understand the theory rather than pass an exam. It assumes no prior theory, but it does not talk down to you: terms are introduced properly, with explanations, in plain adult prose. It is aimed at roughly the comprehension expected around Grade 4 — though it is about understanding, not assessment.

How to use it

• Start with the self-assessment. A handful of questions point you to the Learning Path that fits what you already know — Essentials or Advanced.
• Work through a Learning Path in order. Each one covers the same ideas; they differ only in pace and depth.
• Use the interactive keyboards. Tap a key to hear it, play a scale, build and hear a chord. Hearing the patterns is half the point.
• Come back in short bursts. The app remembers which sections you have seen, so you can dip in and out.

A note on accuracy

Much of the content was produced with the help of AI tools and curated by the creator. It is a learning aid, not an authoritative reference — check anything important against a trusted source. No guarantees are given; you use it at your own discretion.