Open tempo, key, and waveform analysis for your library

Cueport is a local-first music player music you own. For DJs who use Serato, it imports the tempo, key, cues, and beat grids Serato has already calculated. Listeners who are not DJs, and don't use platforms like Serato, have no analysis to import, and serving them meant building an analyzer. trail mix is that analyzer, an open source Rust toolkit that estimates tempo and musical key and generates compact waveform data, all on the local machine. This talk shows how the analysis works, and explains how single-tempo accuracy is evaluated separately from multi-section tracks using representative test music, reproducible benchmarks, and heuristic confidence scores.