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How to write chord progressions in the piano roll

By Tongkit Leong · July 11, 2026 · 8 min read

A chord progression is a short sequence of chords repeated to form the harmonic backbone of a song — build one in the Tracks piano roll by picking a key, stacking chords from the white keys, and playing them in the order 1-5-6-4, no music theory background required.

What a chord progression actually does

A chord progression is the harmonic bed a song sits on. Where a melody is a single line of notes moving through time, a chord is several notes played together, and a progression is a handful of chords played one after another, then looped. The progression sets the emotional temperature of a section — tense or resolved, bright or dark, moving or settled — while the melody and drums do their work on top of it.

You do not need to read music or know the names of scales to build one that works. You need a way to generate chords that already belong together, and a pattern for ordering them that has been proven across thousands of songs. Both of those are mechanical, and both fit inside the Tracks piano roll.

Step 1: Pick a key by starting on the white keys

The easiest key to start in is C major, because every note you need is a white key on the piano roll — no black keys involved. Zoom into the piano roll until you can see the keyboard labels running down the left edge, and note the seven white keys: C, D, E, F, G, A, B. That set of seven notes is your key. Every chord you build from this point comes only from those seven notes.

If C ends up sitting outside a comfortable vocal or instrument range later, you can shift the whole progression up or down by selecting every note and dragging, or by transposing the track. Get the shapes and pattern working in C first — transposing afterward is a two-second fix, not a reason to overthink the starting key.

Step 2: Stack triads to build seven chords

A triad is the simplest chord: three notes stacked in thirds. In practice that means picking a note on the scale, then adding the note two scale-steps above it, then adding the note two scale-steps above that. Do this starting on each of the seven white keys and you get seven different three-note chords, one built on each degree of the scale:

In the piano roll, place all three notes of a chord at the same start position with the same length so they trigger together — that is a chord block. Build all seven and you have a full palette. Because every one of these chords is built entirely from the same seven white keys, any combination of them will sound like it belongs in the same song. There is no wrong chord to grab from this set.

Step 3: Use the 1-5-6-4 pattern to order them

Having seven chords available does not tell you what order to play them in. This is where a proven number pattern saves you from trial and error. Referring to chords by the scale degree they are built on (1 through 7), one pattern shows up across an enormous range of popular songs in pop, rock, and country: 1-5-6-4.

In the key of C, that translates to:

Play those four chord blocks in order, one per bar, and loop it. The pattern works because it alternates between the most stable chord in the key (chord 1) and chords that pull slightly away from it (5, 6, 4) before circling back. That push and pull is what makes a progression feel like it is going somewhere instead of sitting still.

Other patterns worth trying once 1-5-6-4 feels familiar: 6-4-1-5 (starts on the tenser chord, common in emotional pop choruses), 1-4-5-1 (a classic, resolved-feeling loop), and 1-6-4-5 (a slower-moving, doo-wop-style progression). All four use the same seven chords from Step 2 — only the order changes, so building each one is just a matter of rearranging blocks you already have.

Step 4: Voice the chords so the progression flows

If you play each chord in its plain root position — lowest note first, notes stacked straight up — the progression will work but can sound like it is leaping around, because the lowest note of each chord jumps by a wide interval. Voicing fixes this by moving individual notes within a chord up or down an octave so that consecutive chords share notes or move by small steps.

A simple voicing method in the piano roll: look at the top note of your first chord block. Before placing the next chord, check whether any of its notes are close to that same pitch. If so, drag that note to sit near the previous top note rather than defaulting to root position. Repeat for the whole progression. The chords stay identical in content — same three notes each — but the physical distance each note travels between chords shrinks, and the progression sounds smoother and more intentional as a result.

You do not need to voice every chord perfectly on the first pass. Play the progression back on loop, and if a particular transition sounds like an awkward leap, that is the one to re-voice. Your ear will flag the rough spots faster than any rule.

Step 5: Set the rhythm and loop the section

The simplest and most reliable rhythm is one chord per bar — hold each chord block for a full bar, then switch to the next. This is a safe default because it gives each chord enough time to register before it changes, and it lines up cleanly with a four- or eight-bar section length that most other elements in your arrangement will follow.

Once the four-bar 1-5-6-4 loop feels solid, duplicate it to fill eight or sixteen bars for a full verse or chorus section. If you want more movement, try holding chords for half a bar instead of a full bar in the second half of the phrase — this small acceleration right before a section change is a common way to build a sense of lift heading into a chorus or drop. See How to arrange a song for how chord sections like this fit into a full verse-chorus-bridge structure.

Step 6: Layer a bass and melody on top

A chord progression rarely plays alone. Add a bass track underneath and, for each chord, place a single low note matching that chord's root — C for the chord built on C, G for the chord built on G, and so on. This reinforces the harmony and gives the low end of the mix something solid to stand on.

For a melody, the fastest way to guarantee it fits is to favor notes that are already part of the chord playing at that moment. If the chord underneath is C-E-G, a melody note on C, E, or G will always sound supported. Notes from the surrounding scale that are not in the current chord still work, but they create a bit more tension — useful for movement, but worth resolving back to a chord tone by the end of the phrase. If you are building the melody separately, How to make a melody if you don't know music theory covers shape and rhythm in more depth.

Frequently asked questions

What is the easiest chord progression to start with?

1-5-6-4 (in C major: C, G, Am, F) is the most reliable starting point. It appears across a huge range of popular songs because it alternates between a stable chord and three chords that create gentle tension, giving a progression that feels like it is moving without sounding unresolved or strange. Build the four triads from the white keys as described above, loop them one per bar, and you have a working progression in a few minutes.

Do I need to know music theory to write chords?

No. You need a mechanical process: pick a key, stack every third white key to build seven chords, and order four of them using a known-good number pattern like 1-5-6-4. None of that requires reading notation or understanding why the pattern works — it only requires following the steps and trusting your ear on the result. Music theory explains why these patterns sound good; it is useful background but not a prerequisite for using them.

How many chords should a progression have?

Four chords is the most common length for a section, and it is a good default because it is long enough to feel like a complete musical idea and short enough to loop for eight or sixteen bars without becoming predictable. Some songs use two- or three-chord progressions for a stripped-back verse, and some use six or more for a more complex bridge. Start with four and simplify or expand from there once the section is working.

Why do my chords sound like they are jumping around?

This usually means every chord is being played in plain root position, with the lowest note first and the rest stacked straight up. Re-voice the chords by moving individual notes up or down an octave so that consecutive chords share nearby notes and the top note of the chord moves in small steps rather than large leaps. The notes in each chord stay the same — only which octave each one sits in changes — and the progression will sound noticeably smoother.

Can I use a chord progression from one key in a different key?

Yes. A progression like 1-5-6-4 is defined by the relationships between scale degrees, not by specific notes, so it transfers to any key. In the Tracks piano roll, build the progression in C first since it uses only white keys, then select all the notes and transpose the whole block up or down by semitones until it sits in the key you actually want. The relationships between the chords stay identical; only the starting pitch changes.

What is the difference between a chord progression and a melody?

A chord progression is several notes played together at once, moving in a slower rhythm, usually one chord per bar or every few beats — it is the harmonic background. A melody is a single line of notes moving faster, drawing the ear's attention, and it is usually built to fit inside or around the chords playing underneath it. A song typically needs both: the progression sets the emotional foundation, and the melody is what a listener hums afterward.

Build your first chord progression

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