problem
Why does vocal compression sound better when makeup gain is on?
Extra output level can hide whether the compressor actually improved control.
Bias
Makeup gain changes the comparison
A compressor often lowers peaks, then makeup gain raises the whole vocal back up or beyond the original level.
That louder output can make the vocal seem clearer and more present even if compression settings are too heavy.
Check
Match bypassed and compressed level
Toggle the compressor while matching perceived loudness, then check whether phrases are more even without losing emotion or consonants.
Watch gain reduction, peak level, and short-term loudness so makeup gain does not become the reason the setting wins.
Fix
Set output after the compression decision
Choose attack, release, ratio, and threshold at matched level first, then use output gain to place the vocal in the mix.
Meter Core helps separate compression control from level bias while you set vocal dynamics.