If you're reading this then chances are you're familiar with the age-old saying "Master to -14 LUFS for streaming platforms."

Spotify, Apple Music, and other services normalize playback around this level, theoretically ending the loudness war that plagued music for decades.

But do Grammy-winning tracks actually follow these guidelines?

A technical, measurement-based comparison of Tensormix, LANDR, eMastered, and SoundCloud, examining how each automated mastering system handles loudness, dynamics, tonal balance, and stereo processing across the same source material. The analysis focuses on observable trade-offs rather than subjective listening impressions or marketing claims.

A practical, step-by-step guide to mastering electronic music for release, covering what mastering does, what it can’t fix, and how to approach it without guesswork