Few topics split engineers as cleanly as room correction. Some treat Sonarworks or IK’s ARC as essential; others hear “correction” and reach for the door. This episode is that argument in good faith: Simon has run correction for years and finds it genuinely helpful, Terry has been the sceptic and only just installed it, so what follows is two experienced ears comparing notes rather than a sales pitch.
The real question is not “is correction good or bad”. It is “what is it actually good for, and what does it cost you”. And the first answer surprised even the sceptic.
The Curve Is a Diagnostic
Before you process anything, the measurement itself is the prize. Both describe the same lightbulb moment: you run the analysis, and there is the big bass bump and the top-end roll-off, in a curve, explaining years of frustration. That is why your mixes have felt thin and brittle everywhere else. You were compensating for a room you could not see.
“The failed car test is an opportunity to celebrate that you’re not broken. If you can articulate the difference from room to room, you’ve got good ears. It was the room.”
Even if you never switch the processing on, knowing your room misbehaves at, say, 100Hz lets you stop chasing a problem that was never in the music.
The Catch: Headroom
Terry’s honest reservation is real and applies to every brand, not just one. To fix a dip, the software applies a boost, and in a room with an 8dB null in the low end that is an 8dB boost your monitors now have to reproduce. That is 8 to 10dB of headroom gone, amps and drivers seeing a constant low-end hump, and a mix that can feel like it moves differently with correction on. The fix is restraint: dial the correction back by a percentage, meet the room halfway, and leave the top end mostly alone where treatment does the job cheaply anyway.
The Room Still Comes First
The point they both keep returning to is that correction is frequency-only. It will flatten your response but it will not shorten your RT-60, so if the low end hangs around for two seconds, no plugin saves you. Treat the room first: some bass control, diffusion, broadband absorption. Their rough recipe is a few hundred to a couple of thousand dollars of panels plus a hardware ARC, and you get a space where your existing gear simply makes better decisions.
“What you really want is to present yourself a room where you can make better decisions. You’ll do better jobs with the equipment you already have.”
Reference Tracks Keep You Honest
Whatever you use, the safety net is a handful of tracks you know cold, and the trick is to reference the flaws, not the highlights. Simon listens for the almost-too-bright panned guitars in Jeff Buckley’s “Last Goodbye” and the huge low end in Nine Inch Nails’ “Into the Void”. If a mix you know is perfect suddenly seems to want more presence, that is not the record, that is the room, and it is alarm bells.
Headphones
The same logic extends to headphones, where correction is an easier win because there are no room modes to fight. The story here is practical: the ARC on ear plus a set of high-impedance AKGs was too quiet, so the answer was not more software but the right headphones. With a low-impedance planar pair, Simon says he can, for the first time, make real mixing decisions on headphones rather than just checking whether something is too wide. Framed over a career, a serious listening setup is one of the best-value investments you can make.
Final Thoughts
The honest landing spot is that correction is a useful tool, not magic and not a cheat. Use the measurement to understand your space, treat the room before you lean on the software, keep the correction gentle, protect your headroom, and never stop referencing tracks you trust. Simon runs it always-on; Terry expects to run it on and off. Both agree the worst thing you can do is fly blind in a room you have never honestly measured.
