Contrapunctus vs MusicTheory.net

Contrapunctus is a free web platform for music theory, composition, and counterpoint study. Its real-time editor shows Roman-numeral and chord analysis while users write, and identifies part-writing errors and non-chord tones. Compositions can use multiple voices, major, minor, or modal contexts, and sampled-instrument playback. The platform includes an interactive edition of Fux’s Gradus ad Parnassum, with species-counterpoint lessons, an AI tutor, and English and Latin text. Community members can create and solve exercises, share solutions, vote, and earn points toward a 15-rank ladder. Educators can create classes, assign lessons, review submissions, and track scores and class averages in a gradebook. Accounts use email or Google, with projects and activity synchronized across devices. Plain and compressed MusicXML can be imported, but MusicXML or MIDI export is not yet shipped. Some imported details may be simplified or dropped, and tutor free-form questions are limited to 25 per account per rolling hour.

MusicTheory.net is a free, ad-free music theory learning site with animated lessons, practice exercises, and reference tools. Lessons address notation, rhythm, scales, intervals, chords, and chord progressions. Online exercises cover identifying and constructing material on the staff, keyboard, and fretboard, as well as ear training. Calculators handle accidentals, intervals, scales, chords, analysis, and twelve-tone matrices; other tools include a tempo tapper and staff paper generator. Teachers can make permanent links to customized exercises and validate exercise verification codes. Students can create signed Progress Reports with codes teachers can verify. Lessons, exercises, and tools can be embedded in other sites using HTML frames or iframes; the FAQ recommends a minimum size of 600 by 600 pixels. The Tenuto app for iPhone and iPad adds 24 exercises, six calculators, customization, Challenge Mode, and offline use. Theory Lessons is an iPhone and iPad app with 39 animated lessons. The website plan includes all site content at free, with no ads.