Classic / perfect
Stay put, step ±1 on the circle, or flip to relative major/minor. Cleanest blends — your default while mixing live.
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pick a key
Safe next keys
Tap the wheel or a key below. Classic next keys stay pinned for quick mixing.
Minor
Major
Your library
Import a CSV from djay Pro (best if you already analyzed there) or from a folder scan. Then search and pick compatible next tracks.
How to export from djay Pro (phone & desktop)
iPhone / iPad: open djay → My Collection → open a playlist → tap the playlist menu (⋯ or the song-count header) → Export as CSV file → save to Files / share to this device. Then open Key Mixer in Safari and use Import CSV.
Mac / Windows: playlist header menu → Analyze Songs (if needed) → Export as CSV File… → import that file here.
djay’s Analyze data stays inside djay — it is not written into your audio files. The CSV export is how Key Mixer gets Key + BPM.
Folder scan alternative:
npm run scan-library -- ~/Music/MyPlaylists -o library.csv
Compatible tracks
Energy & mood moves
From . Keys marked Classic also appear above. Parentheses = alternate / riskier cousins.
Pro moves for this key
From Mixed In Key’s advanced techniques — calculated for . Tap a key to switch into it.
What boost / drop / mood mean
These labels are about the key change, not how hard the next song hits. A chill track in a “boost” key can still feel soft; a banger in a “drop” key can still slap.
Energy boost (+ → +++)
Moves that tend to brighten or “open” the set. More pluses = bigger leap. Save +++ for peaks.
Energy drop (− → −−−)
Settling / cooling. Useful after a peak or into a breakdown. More minuses = deeper come-down.
Mood change
Emotional color shift (major ↔ minor personality) more than louder/quieter — when you want the story to turn.
Transition table
Live reference for the selected key — same data as the cards above.
Mixing lessons
Practical takeaways from Mixed In Key’s advanced harmonic mixing chapter — paraphrased for booth use.