Music libraries get audited rarely because the data is scattered. One number changes that.
Most DJs and music collectors know their library has problems. What they don't know is which problem to fix first, or how big the gap is between "current state" and "clean." Looking at separate lists — missing tracks, duplicates, folder scatter, quality issues — produces decision paralysis. Without a single number to anchor the conversation, maintenance gets perpetually deferred. The library degrades quietly until the day a critical track is missing or a club PA exposes a fake-320.
Supported today
Rekordbox · Serato DJ · VirtualDJ (incl. Favorite Folders) on Windows 10+ and macOS (Apple Silicon + Intel).
A single score changes the conversation from "my library needs cleanup" (vague, perpetually deferred) to "my library is at 72; here's what gets me to 90." That framing turns library maintenance from a dreaded weekend project into a series of 10-minute wins, each visible in the score moving up. Music Library Doctor's Library Health Score is the explicit product expression of this idea. The methodology is transparent — every component is documented, weights are visible — so you can disagree with the weighting and pull the action you think matters most. But the headline number does what no list of lists ever did: it makes maintenance happen.
Above 85 is healthy. 70–84 has room to clean up. 50–69 has real problems that affect daily use. Below 50 needs a dedicated cleanup session. Adjust mentally for library size — a 100-track library at 70 is rougher than a 50,000-track library at 70.
No — it gives you a starting point. The breakdown shows what's pulling the score down so you can decide which fixes match your priorities. A score is a prompt for action, not a substitute for judgment.
MLD shows both — an overall score for multi-app DJs and a per-app score for app-specific decisions. The overall is the headline; the per-app is the drill-down.
The default weighting reflects what tends to matter most across DJ use cases. Per-component drill-downs let you see exactly what's contributing and prioritize accordingly. Custom weights are on the roadmap.
Free tier covers detection and viewing. Lifetime access is $49 — $19 for the first 100 DJs.
