Adding a new process in mastering often requires revisiting and adjusting earlier decisions in the chain
Mastering processors are in series: the output of one feeds the input of the next, so their interactions are cumulative. Adding an exciter or compressor after EQ may shift the perceived tonal balance in a way that makes the EQ decisions look wrong in retrospect. This is normal — it is not a sign of poor initial decisions but rather of emergent interaction between processes. The iterative approach accepts this: apply a process, listen to the cumulative result, return and fine-tune earlier stages as needed. Accepting this loop prevents the mistake of locking early decisions in stone and avoids compensating with yet more processing when a backward adjustment would be cleaner.
Examples
You apply a low-shelf cut, then add an exciter. The exciter plus the low-shelf makes the track feel too thin. Rather than adding a low-shelf boost after the exciter, return to the original low-shelf and reduce its depth — a cleaner solution with fewer processes.
Assessment
After applying EQ and limiting, you add an exciter and the result sounds too bright. Name two ways to address this. Which is preferable from a minimum-intervention standpoint, and why?