Harmonic Mixing Guide: How to Mix in Key (DJs and Producers)
Short answer: the Camelot wheel gives each of the 24 musical keys a code from 1A to 12B. The number is a position on the wheel (like a clock), A means minor and B means major. Tracks mix cleanly when their codes are the same, one number apart with the same letter (8A to 7A or 9A), or the same number with the other letter (8A to 8B).
| Camelot | Key | Camelot | Key |
|---|---|---|---|
| 1A | A♭ minor | 1B | B major |
| 2A | E♭ minor | 2B | F# major |
| 3A | B♭ minor | 3B | D♭ major |
| 4A | F minor | 4B | A♭ major |
| 5A | C minor | 5B | E♭ major |
| 6A | G minor | 6B | B♭ major |
| 7A | D minor | 7B | F major |
| 8A | A minor | 8B | C major |
| 9A | E minor | 9B | G major |
| 10A | B minor | 10B | D major |
| 11A | F# minor | 11B | A major |
| 12A | D♭ minor | 12B | E major |
Harmonic mixing is the practice of only transitioning between tracks that are musically compatible. When done well, it makes a DJ set feel like one continuous piece of music. Here's everything you need to know to do it right.
What Is Harmonic Mixing?
Harmonic mixing means only combining tracks in compatible musical keys. Two tracks in compatible keys blend naturally. Two tracks in clashing keys create dissonance — that uncomfortable, off-note feeling that makes dancers lose focus.
The Camelot Wheel: The Foundation of Harmonic Mixing
The Camelot wheel maps all 24 musical keys to a number (1-12) and letter (A = minor, B = major) system. The entire system is built on one rule: adjacent codes are compatible.
Adjacent means: - Same number, different letter (`8A` and `8B`) — relative keys sharing the same notes - One step clockwise (`8A` and `9A`) - One step counter-clockwise (`8A` and `7A`)
The Full Camelot Reference
| Code | Key | Code | Key |
|---|---|---|---|
| 1A | A♭ Minor | 1B | B Major |
| 2A | E♭ Minor | 2B | F# Major |
| 3A | B♭ Minor | 3B | D♭ Major |
| 4A | F Minor | 4B | A♭ Major |
| 5A | C Minor | 5B | E♭ Major |
| 6A | G Minor | 6B | B♭ Major |
| 7A | D Minor | 7B | F Major |
| 8A | A Minor | 8B | C Major |
| 9A | E Minor | 9B | G Major |
| 10A | B Minor | 10B | D Major |
| 11A | F# Minor | 11B | A Major |
| 12A | C# Minor | 12B | E Major |
Getting Accurate Key Data
The Camelot wheel is only useful if the key data is accurate. Most DJ software includes built-in key detection, but quality varies. For the most accurate results, use a dedicated key detection tool on your audio files before importing them into your DJ software.
Tunebat lists the key, Camelot code and BPM for over 100 million released songs, and Mixed In Key, rekordbox, Serato DJ Pro, Traktor and VirtualDJ analyze the files you import. For a song you want in your own session, Premix reads the key (with the Camelot code) and BPM from the audio.
BPM Matching: The Other Half of the Equation
Harmonic mixing handles keys. BPM matching handles tempo. Both matter. A harmonically smooth transition between tracks at very different BPMs still sounds jarring.
Building a Harmonically Planned Set
Step 1: Tag your library
Every track you regularly play should be tagged with its Camelot code. Most DJ software lets you add custom tags to tracks.
Step 2: Plan your key flow
Smooth energy build: Stay in the same code or move one step at a time (`8A` → `9A` → `10A`).
Energy shift: Jump to the relative major or minor (same number, switch A/B).
Big energy reset: Jump 4-5 positions intentionally — creates musical tension that signals something is changing.
Step 3: Build transitions around compatible codes
Filter your library by Camelot code first. Only tracks in `7A`, `9A`, or `8B` are compatible with your current `8A` track.
Advanced Techniques
Moving clockwise (e.g., `8A` → `9A` → `10A`) raises tension gradually — each step moves up a perfect fifth.
Switching letter at same number (`8A` → `8B`) shifts from minor to relative major. Same notes, completely different feel.
Energy jumps (skipping multiple positions) create deliberate harmonic tension. Powerful at drops and breakdowns.
Common Mistakes
Trusting built-in key detection without verifying. DJ software detection is inconsistent. A verified library is a reliable library.
Staying in one key all night. Move between compatible keys intentionally — that's what makes a set dynamic.
Treating the wheel as a hard rule. If two tracks sound great together and their codes aren't adjacent — use your ears.
Summary
Harmonic mixing is about intentionality. The Camelot wheel makes it practical without requiring music theory.
Get the key data right. Plan your transitions. Move around the wheel with purpose.
To get a song's key and BPM without any guesswork, Premix searches the song, reads its key (with the Camelot code) and BPM, and puts it in your project on the grid, with stems if you want them. See Premix
FAQ
What is the Camelot wheel?
A chart that maps the 24 major and minor keys to codes from 1A to 12B, built on the circle of fifths. DJs use it to find tracks that mix without clashing. The system was popularised by Mixed In Key.
What do A and B mean on the Camelot wheel?
A is a minor key and B is a major key. The same number with the other letter is the relative key: 8A (A minor) and 8B (C major) share every note.
Which keys mix together on the Camelot wheel?
The same code, one number up or down with the same letter, and the same number with the other letter. From 8A that is 8A, 7A, 9A and 8B.
What is an energy boost mix?
Jumping two numbers up with the same letter (8A to 10A), or one semitone up (+7 on the wheel). It sounds like a lift and works best used sparingly.
Is the Camelot wheel the same as the circle of fifths?
It is the circle of fifths with simpler labels. Moving one step around either one changes the key by a fifth, which is why neighbours share six of seven notes.