Build the mix in stages, adding instruments in order of sonic importance

Rather than throwing up every fader at once (a technique that works only with decades of experience), less experienced engineers do better building the mix in stages, adding instruments progressively in order of importance — where sonic importance matters as much as musical importance. Starting from whatever drives the track (rhythm section or vocal) and adding outward avoids the common problem of running out of space for the elements that matter most.

Examples

Starting from kick and snare, then bass, then the lead vocal, then rhythm guitars means each new part finds its level around the already-established important elements, leaving room for the big vocal.

Assessment

Explain why building the mix in order of importance produces better headroom decisions than raising all faders at once.