Voices in my head!?

So im right now playing an ARAM as Kayle and when i took the enemies tier 2 tower i heard a voice, the music was too loud so i turned the music down and then when we lost our tier 1 i heard a deep almost like Aurelion Sol who said "Aw your poor little tower fell". and i asked my team and no one else heard it, am i crazy, is it a kayle specific thing due to her lore? if so who else? and is it only ARAM? answers please :) im very scared im insane