Upload your mix — a draft, a bounce, a master candidate — and the engine tells you exactly what stands between it and the target: which bands, how many dB, how much width. Add a reference track and it measures the gap to that instead.
No reference? The engine picks a mastering-grade target from how your track scores on the Radar. Your file is analyzed and deleted — we keep numbers, not audio.
Report only — your audio is analyzed and deleted, nothing is rendered or modified. Fix the mix yourself, or let the Mastering Kit render it.