What distortion usually means
Most distortion after boosting is clipping. The audio peaks exceed the level the file or playback chain can reproduce cleanly, so transients flatten out and the sound becomes rough, crunchy, or brittle.
Why the loudest moment matters most
A quiet intro can handle far more gain than the loud chorus, crowd cheer, or impact sound later in the file. If you only test the beginning, you may export a file that breaks down halfway through.
Use smaller steps than you think
One big jump can move you past the usable range before your ear adapts. Smaller steps let you hear where clarity starts to collapse, especially in vocals, cymbals, and bass-heavy passages.
Sometimes the answer is not “more volume”
Excess bass can create the impression of low clarity even when the file is already loud enough. A gentle EQ correction may produce a result that feels clearer and subjectively louder without pushing the peaks into distortion.
Trust comparison, not first impression
People often prefer the louder version immediately, even when it is worse. Keep playback conditions consistent and compare Original vs Boosted more than once before exporting.