Key Detector
MIDIIdentify any musical key to find its Open Key code, relative major/minor, and scale notes.
Key Notation Converter
Convert standard musical keys to Open Key codes and vice versa instantly.
Interactive Key Selector
Manual Conversions
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Select a Key
Compatible Mixing Keys
Understanding Open Key DJ Notation
Convert standard musical keys to DJ Open Key codes and vice-versa for clean harmonic mixing.
Harmonic mixing is a technique used by DJs to mix tracks in key, preventing harmonic clashes and creating smooth transitions. Open Key notation maps keys to simple numeric codes:
- Numbers 1–12 match the 12 positions of the Circle of Fifths.
- Letters d (Dur/Major) and m (Moll/Minor) represent key families: m denotes Minor scales, d denotes Major scales.
- Moving one step clockwise/counterclockwise (+/- 1) or switching between major and minor changes the key harmonically.
Frequently Asked Questions
What is Open Key notation?
Open Key notation is a system created to help DJs mix music harmonically. It numbers the 24 musical keys from 1 to 12 followed by 'm' (Minor/Moll key) or 'd' (Major/Dur key).
How do I use this converter to match tracks?
Convert your track's key to Open Key. A compatible mix is any key within one step (+/- 1) on the wheel, or a swap between m and d in the same number.