The War Against Parallel Walls
Natural room resonance is the silent architect of a record. In untreated spaces, parallel surfaces cause "flutter echoes" and standing waves—frequencies that reinforce themselves, creating a muddy low-end build-up that no digital plugin can truly fix.
Professionals utilize bass trapping and diffusion to break these patterns, ensuring the monitor playback is honest. Without a neutral environment, you aren't mixing the music; you're mixing the flaws of the room.