How to organize and tag your DJ library

The golden rule: one source folder you never move

Your DJ software doesn't copy your tracks: it remembers where they are on the drive. If you move or rename a file after importing it, the software loses it. The cue points, beatgrids and playlists that used it then point to nothing.

Hence the rule: pick one DJ music folder, and leave what's in it alone. A setup that works well:

• a “To sort” folder where new downloads land;
• one folder per genre (or per month, if you download a lot), where you file tracks once you've listened to them;
• an “Archive” folder for what you don't play anymore, instead of deleting it.

The fine sorting (energy, use, type of gig) then happens in the software, with playlists. Folders are only there to tell you where the files are.

Readable file names

A clean file name reads without opening the software: Artist - Title (Version).mp3. Avoid long names with track numbers, website names or special characters: they make searching harder and some USB sticks don't handle them well.

Files downloaded from Nocti Pool are already named this way.

The tags that matter

Tags are the info written inside the file (the metadata). They're what your software shows in its columns and uses for search. The most useful ones for a DJ:

• Title, artist, genre, year: the basics, for searching and sorting.
• BPM: to plan your transitions without analyzing everything.
• Key: ideally in Camelot notation, for harmonic mixing.
• Comment: a free field, visible in all software, perfect for energy or a personal note (“opener”, “peak”).
• Rating (stars): to mark your favorites, or energy.
• Artwork: it helps you recognize a track at a glance.

Here's what Nocti Pool writes into every downloaded file:

Title

Clarity (Extended Mix)

Artist

Zedd Ft Foxes

Genre

EDM

BPM

128

Key

5B

Comment

Energy 5/5 · 5B · 128 BPM

Rating

★★★★★

Artwork

image embedded in the file

The comment always follows the same format, for example “Energy 4/5 · 8A · 128 BPM”. Sort the comment column and your tracks line up by energy.

Pick one key notation and stick to it

Every program can detect key, and each one has its own display settings:

• Rekordbox: Preferences, View, key display format. Choose “Alphanumeric” to get Camelot numbering (1A to 12B).
• Serato DJ Pro: in Setup, on the Library + Display tab, choose Camelot. The “original key” option shows the key already written in the file.
• Traktor: key shows in standard notation or Open Key. The conversion chart in the Camelot wheel guide bridges the gap.

Mixing several notations in one library is the best way to get it wrong in the middle of a gig. If your files already come with a key, you can also turn off key overwriting during analysis, so you don't overwrite a value you've checked.

Playlists: sort by use

Folders tell you where the files are, playlists tell you what they're for. A few playlist ideas that actually help at a gig:

• by role: opening, build, peak, breather, closing;
• by energy: one playlist per level;
• by context: wedding (clean versions), bar, club;
• “To listen”: everything that just came in, to sort when you have time;
• by month: “2026-10”, to find the new tracks from a given period.

Your software's smart playlists, if it has them, fill themselves based on tags: genre, BPM, key, rating or comment.

Analysis, beatgrid and cue points

Before you play a new track in public:

1. Analyze it in your software (tempo, beatgrid, waveform).
2. Check the beatgrid on the first beats: an offset grid makes every loop drift.
3. Set your hot cues: the first beat, where the vocal comes in, the break, the outro. Keep the same color code across all your tracks.

Backups and USB sticks

• Back up your software's library, not just the music: that's what holds your cue points, beatgrids and playlists. Rekordbox has a library backup option in its menu, Serato keeps its data in a “_Serato_” folder, Traktor in a collection file.
• Keep three copies: your laptop, an external drive, and one copy away from home or online.
• Prep two USB sticks for the club's decks. A stick dying mid-gig happens to everyone.

Frequently asked questions

Should I organize my DJ music by genre or by date?

Both work for folders, as long as you don't move the files afterward. The real organizing happens in the software, with playlists by use and by energy.

Why are my tracks missing in my DJ software?

Almost always because the files were moved or renamed after import. Put them back where they were, or use your software's relocate feature to point it to the new folder.

Does DJ software analysis overwrite existing BPM and key tags?

It depends on the software and its settings. Some keep their own analysis in their database without touching the file, others rewrite the tags. Check your analysis settings before importing a big batch of files that are already tagged.

Should DJs use MP3 or WAV?

MP3 takes up less space and plays everywhere. WAV is lossless, useful on a big sound system. If you play on club decks, check that the gear reads the format.