NSM Music Apps

39 music apps from Jason Zac and Nathaniel School of Music. Explore harmony, rhythm, notation, ear training and daily practice.

Music education

Interactive lessons and reference guides for intervals, harmony, scores, ragas and musical instruments. Start here when you want to understand an idea.

Cadence Library — Compare piano cadences across keys and listen to how different chord movements create closure, suspense or a turn in a new direction. (Free browser tool)
Circle of Fifths — Explore the Circle of Fifths through keys, scales, chords and intervals. Use the wheel to connect what is on the page with what you hear at the instrument. (Free browser tool)
Two Notes — A guided field guide to intervals: consonance, inversions, scales, modes and the Circle of Fifths. Read the explanations, play the examples and hear how two notes become the building blocks of music. (Free browser tool)
Master Key — Explore diminished-seventh harmony, its resolutions and sixth-diminished sounds. Hear how a compact, repeating shape can lead to several musical destinations. (Free browser tool)
Melakarta Sphere — Navigate a three-dimensional map of the melakarta system. Examine swaras and relationships, then compare the sound and structure of neighbouring ragas. (Free browser tool)
Read — Explore a score through its chords, patterns and notation. Read the music, reveal its harmonic structure, and practise a passage at your own pace. (Free browser tool)
Span — An interval practice studio with separate Ear, Eyes, Hands and Voice drills. Use the circle, keyboard and staff together, then test a distance by listening, reading, playing or singing it. (Free browser tool)
The Dominant Seventh — Study dominant-seventh harmony through musical examples. Explore its chord tones, colour and pull towards the next chord. (Free browser tool)
Atlas — Explore the mathematics and physics behind musical instruments. Connect vibration, frequency and musical relationships through interactive explanations. (Free browser tool)
DAW Mentor — Explore REAPER lessons, scripts and guided help for recording and production. Start with the studio task you want to complete, then work through it in your DAW. (Free browser tool)
Voicing Room — A hands-on lesson room for piano chord voicings. Study spread triads, shells and upper structures on the staff and keyboard, then practise the shapes through keys and progressions. (Free browser tool)

Ears & voice

Short quizzes, listening exercises and singing practice. Connect the sound in your ear with a note, a scale degree or the written score.

Note Forge — Practise notes and intervals, use familiar musical references, and explore keys and chords. Short listening exercises turn theory into something you can recognise. (Free browser tool)
Nathaniel Music Quiz — Test ear training, theory and notation with interactive questions. Use the linked teaching explanations to understand an answer and decide what to practise next. (Free browser tool)
Prima Vista — Practise singing from notation and review pitch feedback. Choose a comfortable range, listen carefully and work through a short phrase at a manageable pace. (Free browser tool)
Solfa Studio — Practise scales, solfège and swaras with visual and musical context. Connect note names, scale degrees and the sound you sing. (Free browser tool)
Dhun — Recognise melodies from scale degrees and swaras. Read the clues, sing the shape and connect familiar music with its underlying note relationships. (Free browser tool)

Rhythm & timing

Metronomes, rhythm lessons and pattern builders for subdivisions, accents, odd metres, swing and coordination.

Groove Kit — Explore rhythm, patterns and musical practice tools in one workspace. Use a repeated groove to work on timing, coordination and musical feel. (Free browser tool)
Groove Metronome — Work with tempo, accents and polyrhythms instead of a single unchanging click. Set up a pulse that matches the rhythmic problem you want to solve. (Free browser tool)
Horo — Explore Bulgarian rhythm alongside melody and harmony. Break an odd metre into short and long groups, then learn how those groups become a dance. (Free browser tool)
Pendulum — Explore accents, subdivisions, scale patterns and chord movement with Western, Hindustani or Carnatic note names. Keep the pulse steady as the musical pattern changes. (Free browser tool)
Rhythm Arithmetic — Build a phrase from sounds and silences, see it become staff notation, and loop it for practice. Mix beat divisions and explore how rhythmic cells fit together. (Free browser tool)
Rhythm Teacher — Build accent patterns, divide beats and explore odd metres and polyrhythms. Use the visual pulse and konnakol labels to connect counting with your voice and hands. (Free browser tool)
Swing Garden — Work with straight and swung rhythm in an interactive teaching workspace. Compare the feel, study the notation and use short musical examples in practice. (Free browser tool)

Compose & arrange

Write notes, draw melodies, generate progressions or reshape a chord. These workspaces help you create and develop musical material.

Cantus — Choose a root and scale, hear piano voicings, and move the same shape through different intervals. Pin a few favourites and listen to how they connect. (Free browser tool)
Chord Randomizer — Generate a chord progression, choose how simple or colourful the harmony should be, and practise it at your own tempo. A starting point for comping, improvisation and writing. (Free browser tool)
GRADUS — Work through counterpoint with an editable score, a given melody and feedback on each interval. Hear how independent lines meet, move apart and arrive at a cadence. (Free browser tool)
Lipi — Write and hear notation in the browser. Work from typed notes, MIDI or an existing score, then prepare musical examples for practice and teaching. (Free browser tool)
Melodic Curves — Sketch a melodic contour, choose a scale and hear the line take shape. Explore how the same rise and fall changes when the musical vocabulary changes. (Free browser tool)
Riff Database — Explore Jason Zac’s original compositions by musical mood, style, scale and metre. Follow an idea into a listening session, a new practice challenge or your own writing. (Free browser tool)
Bass Alchemy — Keep the upper notes in place while changing the bass. Watch the chord name change, compare the sound, and build a short progression from a single shape. (Free browser tool)
Chord Trees — Start from a note and explore related chords, inversions and voicings. Hear each choice in context and build a progression as you move through the tree. (Free browser tool)
Roll the Dice — Generate melody, rhythm and harmony ideas, view the notation and refine what you hear. A playful way to get a first phrase on the page. (Free browser tool)

Instrument practice

Focused playing workspaces for scales, runs, voicings and comping. Choose something small and practise it in several keys.

Hexatonic — Practise six-note scales with staff notation, piano playback and rhythmic groupings. Compare colours, explore triad pairs, and take the same material into improvisation. (Free browser tool)
Jazz Harmony Lab — Practise jazz shell voicings, guide-tone movement and comping through changing keys. Hear how a small number of notes can make the harmony clear. (Free browser tool)
Runway — Explore runs, fills and licks with a chosen start and landing note. Practise a line as a musical journey with a clear destination. (Free browser tool)
Woodshed — Keep a practice record, set goals and work on songs with tools for looping, changing speed and changing key. Bring repertoire, recordings and teacher guidance into one routine. (Plans & account)
Pop Lessons — Practice companions for Jason Zac’s pop piano lessons: octave fillers, chord changes and inversions in every key. Access is offered through Patreon. (Patreon membership)
MIDI Piano Visualizer — Play a MIDI keyboard or load a MIDI file to see piano notes, chord names and staff notation together. Explore dedicated learning, teaching and visualisation workspaces. (Plans & account)

Musical games

Listening, memory and musical puzzles to enjoy on your own, with friends or around the family table.

Khelghar — Play music games built around listening, memory and melodic recognition. A playful place for students, families and friends to explore music together. (Free browser tool)

Handwritten Music Composer and OSSIA are in development.

Learn with us · Student portal · Everything for Life · Nathaniel Labs