Interactive Chord Finder

The ii–V–I Progression in Jazz: Theory and Application

Wed, 25 Mar 2026 09:00:00 +0000

If you learn one thing about jazz harmony, make it this: ii–V–I. This three-chord progression is the backbone of jazz. It appears in nearly every standard, often multiple times within a single tune, and understanding it unlocks the logic behind hundreds of songs that might otherwise seem harmonically complex.

What Is a ii–V–I?

The Roman numerals refer to diatonic chords built on the second, fifth, and first degrees of a major scale. In jazz, these chords are almost always played as seventh chords.

Suspended Chords: Sus2, Sus4, and the Art of Tension

Fri, 20 Mar 2026 09:00:00 +0000

Some chords want to sit still. A C major triad lands and stays — stable, resolved, finished. But play a Csus4 and something different happens. The chord hovers, leaning forward, waiting for the 4th to drop down to the 3rd and complete the resolution. That suspended quality — the feeling of expectation before arrival — is what makes sus chords one of the most expressive tools in a songwriter’s vocabulary.

What Are Intervals and How to Identify Them by Ear

Sun, 15 Mar 2026 09:00:00 +0000

Every melody you have ever hummed, every chord you have ever played, and every harmony that has ever moved you is built from one fundamental ingredient: intervals. An interval is simply the distance between two notes. Learn to hear and name intervals and you unlock the ability to figure out melodies by ear, understand why chords sound the way they do, and communicate musical ideas with precision.

What Exactly Is an Interval?

An interval measures the pitch distance between two notes. When you sing the first two notes of “Happy Birthday” — the jump from the repeated note up to the higher one — you are singing an interval (a major second, as it happens). Intervals can be melodic (two notes played one after the other) or harmonic (two notes played simultaneously).

How to Analyse Any Song's Harmony in 5 Steps

Tue, 10 Mar 2026 09:00:00 +0000

You hear a song that moves you — something about the chords creates a feeling you want to understand and eventually recreate in your own music. But staring at a chord chart and asking “why does this work?” can feel overwhelming without a system. The good news is that harmonic analysis follows a clear process, and once you have the steps down, you can decode the harmony of virtually any song in any genre.

The Double Harmonic Scale: From Miserlou to Metal

Thu, 05 Mar 2026 09:00:00 +0000

The opening riff of Dick Dale’s “Miserlou” is one of the most instantly recognisable guitar lines in popular music. It races up and down a scale that sounds nothing like major or minor — something urgent, exotic, and slightly dangerous. That scale is the double harmonic, and its distinctive sound has travelled from Middle Eastern and Eastern Mediterranean traditions into surf rock, progressive metal, film scores, and video game soundtracks.

See Your Scales and Chords on the Guitar Fretboard

Sun, 01 Mar 2026 10:00:00 +0000

The Interactive Chord Finder has always shown scale notes and chord tones on a two-octave piano keyboard. That works well if you think in terms of keys, but guitarists think in terms of fret positions and string patterns. Starting today, you can switch to a guitar fretboard view that maps the same musical information across six strings and fifteen frets.

How to Use It

Below the scale selector you will find a small Piano | Guitar toggle. Click Guitar to switch. Your choice is remembered between sessions, so the tool opens in whichever view you used last.

How to Transpose a Song to Any Key

Sat, 28 Feb 2026 09:00:00 +0000

A vocalist finds the perfect song but cannot reach the highest notes. A guitarist wants to jam with a saxophone player whose chart is in a different key. A songwriter finishes a verse in D major and realises the chorus works better in E. All three need the same skill: transposition — moving a piece of music from one key to another while keeping every melodic and harmonic relationship intact.

Practice Chord Recognition with the Chord Practice Tool

Mon, 23 Feb 2026 07:06:00 +0000

Knowing which chords belong to a key is one thing. Recalling them instantly under time pressure is something else entirely. Whether you are sight-reading a lead sheet, improvising over a backing track, or composing on the fly, the speed at which you recognise and name chords makes a real difference. That is exactly what the new Chord Practice tool is designed to help with.

What the Chord Practice Tool Does

The practice tool presents diatonic chords one at a time, on a timer, and asks you to identify or play each chord before the next one appears. Think of it as flashcards for chord recognition, but with audio, a metronome, and optional MIDI keyboard input.

Explore Scales and Chords with the Interactive Chord Finder

Mon, 23 Feb 2026 06:30:00 +0000

You want to know which chords fit in a key. You want to hear them, see them on a keyboard, and maybe build a progression you can play along with. The Interactive Chord Finder does all of that in your browser — no account, no download, no ads. This article walks you through every section of the tool so you can get the most out of it.

Choosing a Key and Scale

At the top of the page you will find two selectors: the root key and the scale.

Chord Inversions and Voice Leading – Smoother Harmony for Any Instrument

Mon, 23 Feb 2026 06:18:00 +0000

Play a C major chord as C – E – G, then play the same three notes rearranged as E – G – C. The harmony has not changed — it is still C major — but the sound is different. The bass note shifted, the spacing between the notes changed, and the chord now connects more naturally to whatever comes next. That rearrangement is called an inversion, and learning to use inversions is one of the fastest ways to make your chord progressions sound polished rather than blocky.

Pentatonic Scales for Improvisation in Any Genre

Wed, 18 Feb 2026 09:00:00 +0000

Five notes. That is all it takes to improvise convincingly over a blues shuffle, a pop ballad, a rock anthem, or a jazz vamp. The pentatonic scale is the most widely used melodic framework on the planet — not because it is simple, but because it is extraordinarily versatile. If you have ever noodled on the black keys of a piano and noticed that everything sounds good together, you have already played a pentatonic scale.

Chord Progressions Every Musician Should Know

Sun, 15 Feb 2026 10:10:00 +0000

A chord progression is the harmonic engine of a song. It determines the emotional arc, the sense of movement, and the feeling of tension and release that keeps listeners engaged. While there are infinite possible combinations of chords, a handful of progressions appear so frequently across genres and decades that every musician should know them by heart.

This guide covers the most essential chord progressions, explains why they work, and points you to famous songs that use each one.

Extended Chords and Jazz Harmony: 9ths, 11ths, and 13ths

Sun, 15 Feb 2026 10:00:00 +0000

Once you are comfortable with seventh chords, the next frontier is extended chords — 9ths, 11ths, and 13ths. These are the sounds that define jazz, neo-soul, R&B, gospel, and lo-fi hip hop. They add richness, complexity, and emotional depth that simple triads and seventh chords cannot achieve on their own.

This guide explains how extended chords are built, the most common types, and how musicians actually voice and use them in practice.

Modes Explained: From Dorian to Locrian

Sun, 15 Feb 2026 09:50:00 +0000

Modes are one of the most misunderstood topics in music theory, yet the core idea is beautifully simple. If you already know the major scale, you already know all seven modes — you just need to hear each one from a different starting point. This guide breaks down every mode, its unique character, and how you can start using modes in your own playing and writing.

What Exactly Are Modes?

A mode is what you get when you take the notes of a major scale and treat a different note as the tonal centre. The pitches stay the same, but the pattern of whole steps and half steps shifts, creating a new scale with its own distinct flavour.

Seventh Chords: A Complete Guide to maj7, min7, dom7, and More

Sun, 15 Feb 2026 09:40:00 +0000

If triads are the foundation of harmony, seventh chords are where music starts to get truly expressive. By adding just one more note on top of a triad, you unlock a world of colour, tension, and sophistication that has shaped everything from classical sonatas to jazz standards, R&B ballads, and lo-fi beats.

This guide walks you through every common type of seventh chord, how each one is built, where it naturally occurs, and what gives it its distinctive sound.

Minor Scales Explained: Natural, Harmonic, and Melodic

Sun, 15 Feb 2026 09:30:00 +0000

While the major scale is known for its bright, uplifting sound, the minor scale carries a darker, more emotionally complex character. But “the minor scale” is not a single entity — there are three distinct forms, each with its own construction, sound, and purpose. Understanding all three gives you a much richer palette for composition, improvisation, and analysis.

The Three Types of Minor Scales

Western music uses three variants of the minor scale:

Diatonic Chords: A Beginner's Guide to Building Chords from Scales

Sun, 15 Feb 2026 09:20:00 +0000

If you have ever wondered why certain chords seem to belong together in a song while others feel out of place, the answer lies in diatonic harmony. Diatonic chords are the chords that naturally emerge from a scale, and understanding them is one of the most powerful steps you can take as a musician. They explain how songs are built, why common progressions sound satisfying, and how you can start writing your own music with confidence.

The Circle of Fifths Explained: Your Key to Understanding Music

Sun, 15 Feb 2026 09:10:00 +0000

The circle of fifths is one of the most elegant and practical tools in music theory. At first glance it looks like a simple clock diagram, but it encodes deep relationships between all twelve keys, their key signatures, and their relative minor counterparts. Once you understand it, you will find it easier to read sheet music, transpose songs, write chord progressions, and communicate with other musicians.

What Is the Circle of Fifths?

The circle of fifths is a visual arrangement of all twelve major keys (and their relative minors) around a circle. Moving clockwise, each key is a perfect fifth above the previous one. Moving counterclockwise, each key is a perfect fourth above — or equivalently, a perfect fifth below. The result is a map that shows exactly how keys are related to one another.

Understanding the Major Scale: The Foundation of Western Music

Sun, 15 Feb 2026 09:00:00 +0000

If you have ever hummed “Do Re Mi Fa Sol La Ti Do,” you already know the sound of a major scale. It is the most fundamental pattern in Western music, serving as the blueprint from which chords, melodies, and entire compositions are built. Whether you play guitar, piano, or any other instrument, understanding the major scale is the single most valuable step you can take in your music theory journey.