Features

Everything it takes to really know theory.

Lessons that teach it, practice that drills it, an arena that makes it automatic, and the classroom tools to run it for a whole school. Don’t take our word for it: try it right here.

Learn

Understand it first

Twenty-seven lessons in textbook order, from reading the staff to analysing real progressions. Each idea is taught, then explored, before you drill it.

The Key Signatures lesson: Dan’s video beside the course playlist

Video lessons with Dan

Short HD lessons on the staff and at the keyboard, taught by a working music educator.

Interactive explainers

Each lesson’s idea unfolds step by step on a real engraved staff you can play and hear, so it makes sense before you practise it.

Lesson notes

A clear written summary of every lesson, with notation, worked examples and the rules worth remembering.

Melo, your AI tutor

On any page, members can ask Melo a question, have it quiz them, or work through a problem with it step by step.

Practise and check

Practice that never runs out

Questions are generated fresh every time, so there is always another one, and every answer is checked the moment you give it.

Name, write, hear and tap

Name notes and chords, write them on the staff, pick them out on the keyboard, identify what you hear and tap rhythms in time.

Graded quizzes

Each lesson ends with a quiz checked on the server, with an explanation for every question you miss.

Smart review

What you missed comes back until it sticks, and a mastery map shows every note, key and chord as mastered, learning or shaky.

Unit test-outs

Already know a unit? Pass its test-out and skip ahead, with nothing to unlock by hand.

Practice arena

Make it automatic

Sixty-second sprints across 12 arenas, rated as a Theory Tempo that rises only when you get faster and stay accurate.

Play against MeloNew

Race Melo to the most points, or try to keep pace with it all the way. Pick its level from Andante to Prestissimo: it answers like a real player, at that tempo, and levels up and down by the same rules you do.

Three ways to play

Theory has never been this fun.

Battle the whole class, climb the ranks on your own, or race Melo. Points, combos and levels in every round, and every one of them is real theory.

Melo and friends cheering at a live class arena battle
Live battle0:60

Speed Race · Key signaturesSample class

  1. Rubato Fox2,140
  2. 2Dolce Motif2,010
  3. 3Tempo Owl1,890
  4. 4Forte Finch1,760
  1. Battle your class

    Ultimate theory arena battles: the whole class on one clock, every device in, and a live board that reshuffles with every right answer.

  2. Sprint solo

    Sixty-second sprints that climb ten Theory Tempo ranks, from Grave to Prestissimo, with a boss round in every arena.

    Theory TempoAndante · 80 BPM

  3. Take on Melo

    A rival that plays like a real person at the tempo you choose, and levels up and down by the same rules you do.

New

See where you rank

After every counted sprint, see how it compares with everyone’s sprints in that arena. Finish in the top 30% and it names your exact percentage; below that, it simply cheers you on.

Sprint result

Sample

Top 12%

of counted Intervals sprints

Theory Tempo and boss rounds

Ten ranks from Grave to Prestissimo, a ghost of your best run to race, and a boss round in every arena to earn its crown.

Daily warm-up

One minute on your slowest and shakiest items, with double XP for the first one each day.

For teachers

Hand us the theory. Keep the teaching.

The Educator plan runs up to 8 classes of 35 students, and every student joins free.

Melo teaching at the front of a music classroom, with class progress on a laptop
New

Live class games

Host a game on the projector and students join on their own devices. Quiz Showdown asks everyone the same question at once; Speed Race gives the class one shared clock and a live board.

Quiz Showdown · game code 4821

Sample class

Rubato Fox

0

2

Dolce Motif

0

1

Tempo Owl

0

3

28 students playing on their own devices

Assignments and due dates

Assign lessons or a whole unit with a due date, and choose whether the best, first or latest attempt counts.

A gradebook that fills itself

Quizzes grade on submit and land in your gradebook, with each student’s most-missed skills and when they were last active.

Google Classroom export

Export any assignment’s grades in Google Classroom’s layout. No retyping scores.

Boards, goals and challenges

Weekly class XP goals, stage-name leaderboards ranked by improvement, and arena challenges like “everyone to 130 BPM”.

Class calendar

Every due date for every class in one calendar, for you and for your students.

For schools

Ready for the whole school

Accounts for students too young for email, and a licence your school can buy the way it buys everything else.

A teacher and students working through a theory lesson together on a laptop
New

Student accounts without email

Add your class list and print a login card for each student, with a QR code and a picture password or PIN. No student email is ever used.

Printed login card

Sample

Maya

Grade 4 Music · class MX7-QP

My picture password

No email address needed

New

School licences by purchase order

A formal quote, your purchase order, and an invoice due in 30 days, payable by card, ACH or bank transfer. From 3 teachers, each with the full Educator plan for the year.

Lincoln Elementary · 6 teachers

Sample
  1. Quote sent as a PDF
  2. Purchase order received
  3. Invoice due in 30 days
  4. Teachers join with one link

Stay motivated

A reason to come back tomorrow

Progress you can see, at every level, without turning theory into a slot machine.

Melo standing on a stack of books beside a laptop and a staff with a tick

Streaks with a freeze

Daily streaks, with a weekly freeze so one busy day never wipes out your progress.

XP and achievements

Earn XP for practice, quizzes and sprints, and unlock 20 achievements on the way.

Your journey

One page with your streak, XP, achievements and how far you have come through the course.

Community

Ask questions and share wins with other members.

On paper too

Print it, mark it, keep it

For practice away from the screen, and for classrooms that still love a worksheet.

Lesson Review & Practice Pack coverMusic Theory: The Complete Series textbook cover

115 worksheet sets

Printable worksheets for every lesson, each with an answer key.

The textbook

Music Theory: The Complete Series, the book these lessons are built on, with a photocopy licence for your students.

Try two lessons free

No account or card needed. When you are ready, membership opens everything here, and the Educator plan brings it to a whole class for US$39.99/month.