Keys or chords just know what they are
Every song you will come across plays on a certain chord or key. Thankfully most DJ software analyzes the MP3’s or WAV’s in your library, and gives you this information depending on your preferences. Most DJ’s and producers will keep a picture of chord or key wheels to inform themselves on what goes together. So how does it actually work?

The chord wheel like the one on the right work by telling you clearly with colors what chord letters go together. As a general rule of thumb, you don’t want to play songs that have chords on the opposite end of the spectrum. Although you can get away with playing songs that don’t match in color but are close enough such as a C major or G major. Keep in mind that matching chords or keys is more noticeable when singing lyrics occurs rather than rapping lyrics. It is also possible to mix without matching keys, but knowing this helps your mixes stand out from others, where their music might be clashing rather than meshing.
It’s okay if they don’t match
If your trying to key or chord match and your songs don’t mix well, it is still possible to still match them. Most of the controllers or mixing softwares used these days come with pitch/key modulators. These come in the form of a plus or minus section close to the jog wheel.

Here a song being played can be pitched up or down and the corresponding key or chord will show. So if you wanted to change an E major to an F, or a B minor to a C minor, its possible and the songs can match up. Just remember that songs being modulated more than once might sound to low or to high in their pitch. This might sound strange, especially if the song is well recognized and the audience wants to sing along.
Do you have to mix in key?
Since there are many different types of DJ’s, there are many opinions regarding whether one should match chords or keys. Hiphop DJ’s for example can get away with mixing between clashing keys because rapping vocals are less harmonic and they can scratch in other tracks, while EDM DJ’s can just mix in using the outro/intro drum loops before the harmonics/bass lines as most EDM songs contains them. The key (no pun intended) thing to know is that it should be used to maximize the way your mixes sound, and not hinder you from playing songs you know will hype up the crowd. It’s to be used as a tool in your arsenal of tricks to keep the crowd going.




