Contrapunctus

What it does

Account access

Accounts can be created with email or Google, and user profiles sync projects and activity across devices.checked 9 Oct 2026

AI tutor limit

Free-form questions to the Gradus tutor are limited to 25 per account per rolling hour.checked 9 Oct 2026

Analysis

The editor displays Roman numeral and chord analysis while users write and detects part-writing errors and non-chord tones.checked 9 Oct 2026

Classroom

Educators can create classes, assign lessons, review submissions, and track scores and class averages in a gradebook.checked 9 Oct 2026

Community

Users can create and solve exercises, share solutions, vote, and earn points toward a 15-rank ladder.checked 9 Oct 2026

Composition

Users can compose for multiple voices, set major, minor, or modal contexts, and play compositions with sampled instruments.checked 9 Oct 2026

Counterpoint tutor

Gradus provides an interactive species-counterpoint curriculum with an AI tutor and English and Latin text.checked 9 Oct 2026

Import compatibility

Tuplets, mid-piece tempo, key, or time changes, ornaments, and explicit voice tagging are not fully modeled on MusicXML import and may be dropped or simplified.checked 9 Oct 2026

Import limit

The editor imports plain and compressed MusicXML, but export to MusicXML or MIDI is listed as not yet shipped.checked 9 Oct 2026

Privacy setting

Google Analytics is on by default outside the EU and UK, and users can turn it off in settings; EU and UK visitors receive a consent banner.checked 9 Oct 2026

Product

Contrapunctus is a music theory platform with a real-time editor, community exercises, and an interactive edition of Fux’s Gradus ad Parnassum.checked 9 Oct 2026

Support

Users can submit bug reports through a button available at the bottom of every page and feature requests through the user menu.checked 9 Oct 2026