it is necessary the sound of the game in a run to validate the time? I would like to listen to music, or if you can not at least turn off the sound?.

as long as you dont get wr i dont think anyone would care

for the world record if the game sound is needed? :/

my run just got rejected because of no game audio ¯_(ツ)_/¯ https://www.speedrun.com/run/m3d62rwz

game sound is needed in order for a run to be verified, you can record the game audio without hearing any of it though.

Sound is required, just don't listen to it. It's not that hard to figure out a set-up where you can listen to music without hearing the game audio (while also recording your gameplay with sound).