Why the SoundMix Volume Change has a little delay?

[EGO.I]

Damm!! My hero you pretty handsome.This method is really simple and effective, but I was too anxious to ignore it. Thank you for your answer!

@Blackforcedragon

Set Fade in Time to 0 on the Set Sound Mix Modifier, that will make audio change instantly

Please tell me if it helped or if you need more help