Default S4 I9505 Boot Up Sound.

Hi guys,

I've got the S5 boot logo and sound on my S4, but I've noticed the sound is way out of sync with the logo animation.
Is there any reason as to why this might be happening? It seems to very from boot to boot, but it's never in sync at all.
I'm currently running NC9 De-Odexed with Adam Kernel.

Is there any fix to this? It's not a massive thing, but it is confusing me slightly.

Phone: Samsung Galaxy S4
Rom: Stock Rooted
Android: 4.4.2 (KitKat)
Knox: 0x1

Phone: Samsung Galaxy S5
Rom: Stock
Android: 4.4.2 (KitKat)
Knox: 0x0