How to write a chord progression using music notation software

A chord progression is the sequence of chords that gives a piece its harmonic backbone, the part that makes a melody feel settled, tense, or unfinished. If you can name a few chords in a key, you already have enough to write one that sounds intentional rather than random. This guide covers the theory you actually need, a step by step way to build a progression in Flat, and the most useful progressions and mistakes to know before you start.

What you need before you start

You need three things: a key to work in, the chords that belong to that key, and a way to hear your ideas as you go. Pick a key you are comfortable with. C major and A minor are good starting points because they use no sharps or flats, which keeps the chords easy to read and play. If you are not sure which key suits the mood you are after, our guide to choosing the right key is a useful place to start.

The building blocks of a chord progression

Every progression is built from the chords that occur naturally in your key. Stack thirds on each note of the scale and you get seven chords, one per scale degree. Musicians label them with Roman numerals so a progression can be moved to any key: in a major key the chords are I, ii, iii, IV, V, vi, and vii°, and in a minor key they are i, ii°, III, iv, V, VI, and VII. Uppercase numerals are major chords, lowercase are minor, and the small circle marks a diminished chord. If Roman numerals are new to you, our guide to Roman numerals in music lays them out with a full chart.

What makes a progression feel like it is moving somewhere is harmonic function. Most tonal music sorts those chords into three roles:

• Tonic (I, iii, vi). Home base. It sounds stable and at rest, and phrases usually start and end here.
• Predominant, also called subdominant (ii, IV). A chord of motion that leads toward the dominant.
• Dominant (V, vii°). The tension chord. It contains the leading tone and pulls strongly back to the tonic.

A great deal of music follows the cycle tonic to predominant to dominant and back to tonic, because that pattern builds tension and then releases it. The final chord or two of a phrase form a cadence, which decides how finished the phrase sounds:

• Authentic (V to I). The strongest sense of arrival, used to end most pieces.
• Plagal (IV to I). The softer "amen" ending common in hymns, gospel, and blues.
• Half (ending on V). Leaves the phrase open, as if asking a question.
• Deceptive (V to vi). Sets up the tonic, then sidesteps to vi for a surprise.

How to write a chord progression in Flat, step by step

1. Create a new score and choose your instrument. Piano is a good choice because you can see and hear the full harmony on one staff. (Choosing instruments.)
2. Set your key and time signature so the editor knows which chords belong to the key and how many beats each measure holds. (Set time and key signatures.)
3. Write out the diatonic chords of your key so you can see your options at a glance.
4. Choose a skeleton. A four chord loop is the simplest place to begin: lay out I, V, vi, IV and you have the backbone of countless songs.
5. Enter the chords. Stack notes into chords on the staff, or add chord names above it. (Chord name input in Flat.)
6. Play it back and adjust. Loop the section and slow the playback speed if you need to hear each change clearly.

Try this in Flat: In C major, enter I, V, vi, IV as C, G, A minor, F, one chord per measure, and loop it with playback. Then change the last chord from F to G, turning the ending into a V. Listen to how the loop suddenly wants to keep going instead of coming to rest. That single change is the difference between a resolved ending and an open one.

Common chord progressions to start from

These four progressions cover an enormous range of music. Each is shown in C major so you can play it right away:

• I, V, vi, IV (C, G, Am, F). The four chord loop behind a large share of pop songs.
• I, vi, IV, V (C, Am, F, G). The 1950s doo-wop progression, warm and nostalgic.
• ii, V, I (Dm, G, C). The cornerstone of jazz harmony: predominant to dominant to tonic.
• Twelve-bar blues with I, IV, V. Three four-bar phrases that anchor blues and early rock and roll, built mostly on the tonic with the IV and V chords adding contrast.

If you want progressions chosen for a particular feeling, our roundup of emotional chord progressions pairs seven sequences with the moods they tend to create.

Common mistakes and how to avoid them

• Staying on the tonic too long. With no predominant or dominant chord to create tension, a progression sounds static. Give it somewhere to go.
• Never resolving. If every phrase ends on V or vi, the music feels permanently unsettled. Close important phrases with an authentic cadence when you want a sense of finality.
• Ignoring the bass line. The lowest note of each chord forms its own melody. Smooth, mostly stepwise bass motion tends to sound better than large leaps.
• Forgetting about the melody. Chords exist to support the notes on top. If a melody note clashes with the chord under it, change one of the two. Pairing chords with a strong tune is its own skill, covered in our guide to writing better melodies.

Share, export, and find inspiration

Once a progression works, Flat helps you use it. Share a link to get feedback from other musicians, or export your score to PDF to print, MIDI to open in a DAW, or MusicXML to move it to another program. You can also learn a lot by example: browse the Flat community of public scores and clone any of them to see exactly how the harmony is put together.

Writing a strong chord progression comes down to a few reliable moves: pick a key, use its diatonic chords, build tension with predominant and dominant chords, and resolve with a cadence that fits the feeling you want. The quickest way to learn is to write one and listen back. Ready to write your first chord progression? Try Flat for free!