Thanks! The upload version is already not using Delta time, it's actually using the music time itself to calculate the position, pretty much in the way you mentioned. The issue is more complex: on web, the audio gets buffered by the browser, so what godot register is actually not what we are hearing, because it must go through the browser first. After the submissions I tried some workarounds using javascript and trying to incorporate direct communication with the browser on the game, but things were just getting too complex and messy, and I just took the L haha