Loudness guarantee: your master always hits the target LUFS

A user's 'too quiet' complaint led to an audit of every mastering path: the target-LUFS guarantee is now unconditional on all modes (web, custom chains, batch, bot). Reference mastering got a major fix too: spectral-shape matching that preserves loudness (a quiet reference could previously duck the track). Complaint files are now archived for engineering review (30 days, auto-pruned).

Details: https://magicmaster.pro/blog/loudness-guarantee-mastering