How to Check Your Final Mix Before Sending to Mastering
The mix session ends and you think you’re done.
Take a day. Then come back and check it with these steps before you bounce. The problems you find in 30 minutes of fresh listening are the problems a mastering engineer can’t fix.
Take at least 24 hours away
The first rule of mix checking: you cannot check a mix you just finished. Your ears have adapted to everything you’ve done. The eq curves you applied don’t sound like eq anymore — they sound like the sound. The compression you applied feels like the natural dynamics.
Fresh ears hear the mix as a listener would. Tired ears hear the mix as the engineer who built it. You need fresh ears.
Listen on headphones first
Before touching anything, play the mix on headphones with fresh ears. Not to mix — to listen.
Note the first three things that bother you. Write them down before you touch a control. These are probably the most significant issues — your fresh ears found them immediately.
The mono check
Press mono. Does everything still work? Does the low end hold up? Does the kick still punch? Does the vocal stay upfront?
Elements that disappear in mono have phase issues. A bass that loses weight in mono has stereo content below 80Hz that’s canceling out. A vocal that sounds hollow in mono has a frequency problem between the lead and a doubled signal.
Fix phase issues now, not after the bounce.
The low-volume check
Turn the mix down to barely audible. What do you still hear? Whatever is still audible at very low volume is the loudest element — the element with the most average energy.
Is that the right element? If the hi-hats or the reverb tails are the last things you hear as you turn the volume down, they’re too loud relative to the mix.
The playback system check
Play the mix on three systems you don’t usually mix on: earbuds, a phone speaker, a car stereo.
Listen for: does the low end translate? Does the vocal still cut through? Does anything sound harsh on cheaper speakers that wasn’t harsh on the studio monitors?
Harshness that only appears on cheaper playback is usually in the 3–6kHz range — frequencies that well-designed studio monitors handle smoothly but budget speakers don’t.
The full listen
Play the whole song, from intro to fade, without stopping and without touching anything. Follow the emotional arc: does the energy build where it should? Does the chorus feel bigger than the verse? Does the breakdown create genuine contrast?
These large-scale dynamics are impossible to hear when you’re focused on a single channel or a single section.
The bounce level check
Before the final bounce, check your mix bus metering. The loudest peaks in your mix should not exceed -3 to -6dBFS. The average level (measured on a VU or similar) should have meaningful headroom.
A mix that’s already peaking close to 0dBFS before mastering has left no room for the mastering process. The mastering engineer needs headroom to add their processing without clipping.
Jacob Korn at tailout.de offers one piece of advice he gives every client: sleep on it before you send it. The mix that felt finished at midnight often has an obvious problem the next morning — a problem that would have taken a revision request and extra time to fix.
Ready to send your mix? Visit tailout.de — professional mastering with clear communication about what your mix needs at every stage.