To me it's a toss-up between Windows 98: https://m.youtube.com/watch?v=tajDxBaPBBM https://m.youtube.com/watch?v=tajDxBaPBBM ...and Classic Mac: https://m.yo

To me it's a toss-up between Windows 98: https://m.youtube.com/watch?v=tajDxBaPBBM https://m.youtube.com/watch?v=tajDxBaPBBM ...and Classic Mac: https://m.youtube.com/watch?v=XZ1mpI01evk https://m.youtube.com/watch?v=XZ1mpI01evk The Windows sound doesn't play until after a very long, grinding boot sequence with an ambiguous moment of completion, so its slow, grand crescendo is a fitting indicator that the show has now begun. The Mac sound by contrast is played the instant you push the power button, and correspondingly it has a satisfyingly immediate beginning; its single richly textured chord seems to want to convey that pushing that button was the correct decision, and your day can only get better now that your Mac(tm) is powered up.