equalize

verb
equal·​ize | \ ˈē-kwə-ˌlīz How to pronounce equalize (audio) \
equalized; equalizing

Definition of equalize

transitive verb

1 : to make equal
2a : to compensate for
b : to make uniform especially : to distribute evenly or uniformly equalize the tax burden
c : to adjust or correct the frequency characteristics of (an electronic signal) by restoring to their original level high frequencies that have been attenuated

intransitive verb

chiefly British : to tie the score