Tritone Substitution Explained: How to Use the Tritone Sub in Your Beats

You have a ii, V, I that works fine, but it sounds a bit too "textbook". Jazz players, neo soul keys players and a lot of R&B producers fix that with one move: they swap the V chord for a different dominant chord that sits a tritone away. Same function, same pull back home, but with a smooth chromatic bass line and a much more colorful sound.

That move is called a tritone substitution, or tritone sub. In this guide you will learn what it is, why it works, how to build one in your piano roll in under a minute and how to use it in lo-fi, R&B, boom bap and even trap. There is a table at the bottom with the tritone sub for every key.

What is a tritone substitution?

A tritone substitution replaces a dominant seventh chord with another dominant seventh chord whose root is a tritone away. A tritone is three whole steps, or 6 semitones. In C major the dominant chord is G7. The note a tritone away from G is D♭, so the tritone sub is D♭7.

So instead of:

Dm7, G7, Cmaj7

you play:

Dm7, D♭7, Cmaj7

You will see it written in a few ways: subV7, ♭II7 or simply "the tritone sub". They all mean the same chord.

Why does it work?

The tension in a dominant seventh chord comes from two notes: the 3rd and the 7th. In G7 (G, B, D, F) those are B and F. They are a tritone apart, and that clash is what wants to resolve to C major: B moves up to C, F moves down to E.

Now look at D♭7 (D♭, F, A♭, C♭). Its 3rd is F and its 7th is C♭, which is the same key on the piano as B. So D♭7 contains the exact same two tension notes as G7, only with their roles swapped. Because a tritone splits the octave exactly in half, flipping it gives you the same interval again. That is why every dominant chord has exactly one tritone partner.

Your ear hears those two notes resolve the same way, so the chord still "points" at C. What changes is the bass. Instead of jumping down a fifth (G to C), the root slides down one half step (D♭ to C). That chromatic step is the sound people are after.

These two notes are often called guide tones. If you want to go deeper on them, read voice leading explained. New to seventh chords in general? Start with seventh chords explained.

How to build a tritone sub in your piano roll

This works the same in FL Studio, Logic Pro, Ableton or any other DAW.

1. Find a dominant chord that resolves. Look for a dominant seventh chord (like G7) that moves to a chord a fifth lower (like C). That is your candidate. If you are not sure which chords are which, Roman numeral chords helps you label them.
2. Keep the 3rd and 7th. In G7 that is B and F. Leave those notes where they are.
3. Move the root 6 semitones. Drag the root note (G) up or down 6 semitones to D♭. In most piano rolls that is half an octave.
4. Fix the 5th. The old 5th (D) does not fit anymore. Move it to A♭, the 5th of D♭7, or simply delete it. Shell voicings with only root, 3rd and 7th sound great.
5. Update the bass or 808. This is the step people forget. If your bass or 808 still plays G, the sub falls apart. Move it to D♭ as well.

A smooth voicing to copy

Here is the ii, subV, I in C with the top three notes barely moving. Bass notes go in a lower octave.

• Dm7: bass D, chord F, A, C
• D♭7: bass D♭, chord F, A♭, C♭ (B)
• Cmaj7: bass C, chord E, G, B

Look at the lines: the bass goes D, D♭, C. The middle voice goes A, A♭, G. The top goes C, B, B. Everything moves by half steps or stays put. That is why this progression sounds so smooth.

4 ways to use tritone subs in your beats

1. The classic ii, subV, I (lo-fi, jazz, neo soul)

Dm9, D♭7, Cmaj9. Add 9ths to the ii and the I for that soft lo-fi or neo soul color. Loop it over a dusty drum pattern and it already sounds finished. For more loops in this style, see jazz chord progressions and neo soul chord progressions.

2. Sub your secondary dominants too (R&B)

Every dominant chord can be subbed, not only the V. Take this common loop in C: Cmaj7, A7, Dm7, G7. A7 is the secondary dominant pointing at Dm7. Sub both dominants and you get:

Cmaj7, E♭7, Dm7, D♭7

The bass now runs C, E♭, D, D♭ and back to C. It sounds expensive and very R&B. Not sure what a secondary dominant is? Read secondary dominants explained.

3. In a minor key (trap, drill, dark R&B)

In A minor the dominant is E7. Its tritone sub is B♭7 (B♭, D, F, A♭), and it shares D and G♯ (A♭) with E7. Try:

Am, F, B♭7, Am

Because B♭ sits a half step above A, the sub gives the loop a dark, slightly eerie lift right before it lands back home. Use it once at the end of a four or eight bar loop, not on every bar, so the vocal still has space.

4. In a 12-bar blues (boom bap, soul samples)

In a C blues, bar 4 is usually C7 leading to F7 in bar 5. Swap that C7 for G♭7 and the bass slides from G♭ down to F. It is a tiny change that makes a basic blues sound much more grown-up. Want the full form first? Check blues chord progressions.

Make it sound even better: extensions

Tritone subs love extra notes. The most common is the ♯11. On D♭7 the ♯11 is G, which is the root of the original G7 you replaced. So D♭7(♯11) still has a little bit of G7 inside it, and that makes the resolution feel even more natural. A 9th (E♭ on D♭7) or a 13th (B♭ on D♭7) also work well.

For melodies over the sub, the Lydian dominant scale fits best: a major scale with a raised 4th and a lowered 7th. On D♭7 that is D♭, E♭, F, G, A♭, B♭, C♭.

Tritone sub table for every key

Find the chord you want to land on, and you can use either dominant to get there.

Resolves to	Normal dominant (V7)	Tritone sub (subV7)	Shared guide tones
C	G7	D♭7	B and F
D♭ / C♯	A♭7	D7	C and G♭ (F♯)
D	A7	E♭7	C♯ (D♭) and G
E♭	B♭7	E7	D and A♭ (G♯)
E	B7	F7	D♯ (E♭) and A
F	C7	G♭7	E (F♭) and B♭
F♯ / G♭	C♯7 (D♭7)	G7	F and B
G	D7	A♭7	F♯ (G♭) and C
A♭	E♭7	A7	G and C♯ (D♭)
A	E7	B♭7	G♯ (A♭) and D
B♭	F7	B7	A and E♭ (D♯)
B	F♯7	C7	A♯ (B♭) and E

Not sure what key your beat or sample is in? Drop it into the free BPM and key finder first, then look up the right row.

Common mistakes

• Subbing a chord that is not a dominant. The trick only works on dominant chords that resolve. Subbing a random minor chord just sounds wrong.
• Forgetting the bass. The chromatic bass step is half the magic. Move your bass and 808 with the chord.
• Using it everywhere. One tritone sub per loop is usually enough. Too many and your progression loses its sense of home.
• Clashing melodies. If your melody or sample plays the old 5th (D in G7) over D♭7, it will rub. Adjust that note or let the melody rest on the shared guide tones.

Try it right now

Make a four-chord loop in the free chord progression generator: pick a mood and key, download the MIDI and drop it into your DAW. Look for the chord just before you land back on the I, turn it into a dominant seventh and then apply the five steps above. Prefer to write or rap over a beat that is already finished? Browse the NameOnTheBeat beats.

FAQ

What is a tritone substitution in simple terms?

You replace a dominant seventh chord with the dominant seventh chord 6 semitones away. Both chords share the same two tension notes, so they resolve to the same chord. In C major, D♭7 can replace G7.

Why is it called a tritone substitution?

Because the root of the new chord is a tritone (three whole steps) away from the root of the original chord, and because both chords are built around the same tritone between their 3rd and 7th.

Is subV7 the same as ♭II7?

Yes. In the key of C, the tritone sub of G7 is D♭7, which sits on the flat second degree. That is why it is also written as ♭II7.

Can I use a tritone sub on a minor chord?

Not in the classic sense. The trick is built on the 3rd and 7th of a dominant seventh chord. You can turn a chord into a dominant first (for example A minor into A7 before Dm7) and then sub that.

Does a tritone sub work in trap or pop?

Yes, if you use it sparingly. One sub at the end of a loop or right before the hook adds tension without making the beat sound like a jazz record.

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