Using the App
Interactive Key Search
Interactive Fret Search
Interactive Key Slider
Scope & “Why?”s
Pitch & Intervals
Musical Objects
Clocks & Pitch Classes
Grouping Clocks
Equivalence Groups
Evenness & Clusters
Orbifold & Voice Leading
A Diatonic Puzzle
Beyond Diatonic
Staff Notation
Circle of Fifths & Keys
Fret Diagrams
CAGED Fretboard System
Diatonic Modes & Chords
Extensions & Avoid Notes
Top-Down View
Leave-Out Notes
The Game
Using the App
Tutorial
Learn how easy Harmonious is to navigate. If you know how to browse the web, you already know how to use Harmonious.
Harmonious: a Digital Book, Website & Offline App
Welcome to Harmonious, the exhaustive piano and guitar chord and scale app for students, composers, songwriters, arrangers and working musicians. Harmonious covers chords and scales (or modes) and their relationships. See Scope.
Harmonious is an interactive, digital book that lives online in its entirety at harmoniousapp.net and is available offline as a one-time purchase on the App Store. (The app also supports audio.)
Basic Navigation & Features
Use the handy back and forward buttons 
or index button 
to jump around the app from anywhere with a few taps.
Share what you learn with links to the website, so other musicians, or you yourself, can find the info later.
Links
Look for blue text set in small capitals in the sans-serif typeface, like this link to the About page. These links are internal to the App and always stay within the App (and work offline if you have the offline App). Most of the links in the app are internal.
If you spot red small caps text set in the serif typeface, followed by a small arrow, it is an external link, for example this link to Wikipedia’s article on Music Theory. These links leave the App and only work when your device is online.
Play Icons
Throughout the tutorials and glossary entries you may see small 
play button icons. If you have purchased the offline app, these icons can be tapped to play the examples, or you may tap on some of the visuals (especially Staff Notation diagrams) to hear them aloud.
Uniform Navigation
Harmonious supports uniform navigation, which just means that when you see a concept represented visually in a certain way—even on different pages—tapping the same icon or page name will always navigate to the same page. So if you see any of the following kinds of icons, you know what sort of page the link will take you to:
Small treble clef
Click or tap any icon of a key signature to go to the key page and learn the chords for that key.
Bass and treble clefs
Click or tap any icon of a grand staff to go to the interactive keyboard search page for the chord and to learn other ways to play similar things.
Bass clef
Click or tap any icon of a chord in the bass clef to go to the chord page and learn other ways to play it on keyboard or fretboard.
Fretboard grid
Click or tap any guitar finger position diagram to go to the interactive fretboard search page for those notes and to learn about the chord, including other ways to play similar things.
Clock diagram
Click or tap any black and white set class diagram to go to the set class page and learn the musical set theory behind that note pattern.
Roman numeral polygon
Click or tap any hollow polygon with Roman numeral to go to the mode page and learn about the ordered set of notes making up that mode, and compatible chords for the mode.
Filled polygon
Click or tap any color-filled polygon to go to the scale page and learn about the unordered set of notes making up that scale and the modes of that scale.
Large treble clef
Click or tap any wide diagram of a mode or scale in the treble clef to go to the interactive keyboard search page for the mode or scale.
Interactive Pages
- Interactive piano search helps you determine how notes combine into chords and scales just by selecting notes on a keyboard. Tap a chord or scale to learn how to play it and more importantly, when to play it: its parent keys, modes or scales.
- Interactive fretboard search (guitar E standard tuning) helps you determine what you are playing, where to play the same or similar things, and why the chord matters harmonically.
- An interactive circle of fifths reference includes all major and minor keys, showing you triads and seventh chord function with just a simple flick. Extensions (ninths, elevenths, thirteenths) are available as well, with just a tap.
Scope
Harmonious covers the harmony of chords and scales (or modes) and their relationships, including keys. See Scope for an overview of Harmonious’s exhaustive, twenty-first-century approach to music theory, or keep reading to learn how to use different interactive parts of the app.
Learn how easy Harmonious is to navigate. If you know how to browse the web, you already know how to use Harmonious.
Harmonious: a Digital Book, Website & Offline App
Welcome to Harmonious, the exhaustive piano and guitar chord and scale app for students, composers, songwriters, arrangers and working musicians. Harmonious covers chords and scales (or modes) and their relationships. See Scope.
Harmonious is an interactive, digital book that lives online in its entirety at harmoniousapp.net and is available offline as a one-time purchase on the App Store. (The app also supports audio.)
Basic Navigation & Features
Use the handy back and forward buttons or index button to jump around the app from anywhere with a few taps.
Share what you learn with links to the website, so other musicians, or you yourself, can find the info later.
Links
Look for blue text set in small capitals in the sans-serif typeface, like this link to the About page. These links are internal to the App and always stay within the App (and work offline if you have the offline App). Most of the links in the app are internal.
If you spot red small caps text set in the serif typeface, followed by a small arrow, it is an external link, for example this link to Wikipedia’s article on Music Theory. These links leave the App and only work when your device is online.
Play Icons
Throughout the tutorials and glossary entries you may see small play button icons. If you have purchased the offline app, these icons can be tapped to play the examples, or you may tap on some of the visuals (especially Staff Notation diagrams) to hear them aloud.
Uniform Navigation
Harmonious supports uniform navigation, which just means that when you see a concept represented visually in a certain way—even on different pages—tapping the same icon or page name will always navigate to the same page. So if you see any of the following kinds of icons, you know what sort of page the link will take you to:
Small treble clef
Click or tap any icon of a key signature to go to the key page and learn the chords for that key.
Bass and treble clefs
Click or tap any icon of a grand staff to go to the interactive keyboard search page for the chord and to learn other ways to play similar things.
Bass clef
Click or tap any icon of a chord in the bass clef to go to the chord page and learn other ways to play it on keyboard or fretboard.
Fretboard grid
Click or tap any guitar finger position diagram to go to the interactive fretboard search page for those notes and to learn about the chord, including other ways to play similar things.
Clock diagram
Click or tap any black and white set class diagram to go to the set class page and learn the musical set theory behind that note pattern.
Roman numeral polygon
Click or tap any hollow polygon with Roman numeral to go to the mode page and learn about the ordered set of notes making up that mode, and compatible chords for the mode.
Filled polygon
Click or tap any color-filled polygon to go to the scale page and learn about the unordered set of notes making up that scale and the modes of that scale.
Large treble clef
Click or tap any wide diagram of a mode or scale in the treble clef to go to the interactive keyboard search page for the mode or scale.
Interactive Pages
- Interactive piano search helps you determine how notes combine into chords and scales just by selecting notes on a keyboard. Tap a chord or scale to learn how to play it and more importantly, when to play it: its parent keys, modes or scales.
- Interactive fretboard search (guitar E standard tuning) helps you determine what you are playing, where to play the same or similar things, and why the chord matters harmonically.
- An interactive circle of fifths reference includes all major and minor keys, showing you triads and seventh chord function with just a simple flick. Extensions (ninths, elevenths, thirteenths) are available as well, with just a tap.
Scope
Harmonious covers the harmony of chords and scales (or modes) and their relationships, including keys. See Scope for an overview of Harmonious’s exhaustive, twenty-first-century approach to music theory, or keep reading to learn how to use different interactive parts of the app.
