Every file that arrives goes through the same two-part read before it is filed anywhere. Nothing is renamed, merged or deleted along the way — sorting only ever moves a file into a folder.
1. The filename and its folder
Names carry a lot. SP_KICK_DIST_02.wav is a kick; Vox_Chop_Am_140.wav is a vocal chop in A minor at 140 BPM. The folder a file came in also counts: a file that arrived inside a folder called Hats is read differently from a loose one.
2. The audio itself
The file is decoded and measured: length, transient shape, spectral balance, harmonic content, whether it loops cleanly. That gives an instrument guess, a key, and a BPM independently of whatever the name claimed.
3. The confidence score
The two reads are combined into a single score between 0 and 1. The score decides what happens, and you can see it on any file in the Finder’s Confidence column or in the info panel.
- Above 0.8 — filed automatically, into the folder your taxonomy says it belongs in, with the key and BPM written to its metadata.
- 0.5 to 0.8 — sent to Review. The file is not moved anywhere. Review lists it with the suggested destination so you can accept it, change it, or leave it.
- Below 0.5 — left in the Inbox, untouched. A guess that weak is worse than no guess.
Where the name and the audio disagree — a file called Kick_01 that is clearly a snare — the score drops, which is exactly the case Review exists for.
Things worth knowing
- Sorting runs on upload and takes a few seconds per file; a large pack finishes minutes after its transfer does.
- Key detection is reliable on tonal material and unreliable on percussion, noise and heavily processed textures. Those usually land in Review.
- The folder structure is yours. Sorting fills in the taxonomy you set in Settings › Sorting — by instrument, by key, by BPM, or by pack.
- You can turn sorting off per folder. Everything in it then lands in the Inbox and stays there.
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