Can You Mix a Whole Record on Headphones? What SoundID Reference Changed

Yes. I mixed my whole record on a pair of KRK KNS 8400 headphones in a house, not a studio. The thing that made it work was SoundID Reference, which flattens the headphone's frequency response so what I hear is closer to what a flat monitor would give me. Before calibration, my mixes came out bass-light on every other system. After, they translated to the car, the phone, and earbuds on the first try far more often.

Here is what calibration does, how to set it up in Logic Pro, and the habits that matter more than the software.

Why headphones are hard to mix on

Every headphone has its own frequency curve. The KNS 8400 is fairly even for the price, but it still has bumps and dips, and your brain adjusts to them within minutes. You end up compensating without knowing it, which is why a mix sounds fine on the cans and wrong everywhere else.

Monitors in a room have the same problem plus the room. Headphones at least take the room out of it.

What SoundID Reference does

SoundID Reference is a calibration plugin from Sonarworks. It has measured profiles for a long list of headphones, including the KNS 8400, and applies an inverse EQ curve so the output is flat. You hear the mix, not the headphone.

Setup in Logic Pro:

1. Install SoundID Reference and pick your headphone model in the app.
2. Put the SoundID Reference plugin as the last insert on the stereo output in Logic.
3. Make sure it is bypassed when you bounce. The plugin is for your ears, not the file. I keep a note on the output channel strip as a reminder.
4. Optional: use the Systemwide app instead so calibration applies to Spotify, YouTube, and reference tracks too, and leave the plugin out of Logic.

Habits that matter more than the plugin

• Reference constantly. Pull a commercial track in your genre into the session and A/B at matched loudness.
• Keep the level moderate. Headphones make it easy to mix loud for hours. Loud mixes become dull mixes.
• Check mono. Headphones exaggerate width. If the vocal disappears in mono, fix it.
• Take breaks. Your ears recalibrate to the headphone curve faster than you think.
• Walk it to the car. Still the best translation test I have.

What changed on my mixes

The two things SoundID fixed for me were the low end and the vocal level. Uncalibrated, I was pushing the bass and kick too hard because the KNS 8400s were polite down there, and I was burying the vocal because the headphones' upper mids made it feel forward.

Do you still need monitors?

Not to finish a record. If you have the room and the budget, treated monitors are a better primary reference and headphones become the second opinion. I don't, so the headphones are the primary and the car is the second opinion.

FAQ

Does SoundID Reference support the KRK KNS 8400?

Yes. The KNS 8400 has a measured profile in SoundID Reference, so you pick it from the list rather than measuring the headphones yourself.

Should you bounce a mix with SoundID Reference on?

No. Bypass or remove it before bouncing. The calibration curve is for your monitoring only. If it ends up in the file, the mix will sound wrong everywhere.

Can a home studio mix be release-ready on headphones?

Yes, if you calibrate, reference against commercial tracks, check mono, and test on other systems. My album was mixed this way.

Bottom line

Calibrate the headphones, put the plugin last on the output and bypass it on bounce, reference obsessively, and check in the car. The monitoring chain is listed on the rig page.