sound system makes noises while when bootsplash is shown

[obedlink]

when I start ubuntu/kubuntu my 5.1 sound system makes noises while when bootsplash is shown.
also happens on my laptop, I think it's a general problem.

I use my dedicated sound card, Creative x-fi titanium.
same happens with the integrated card.

[SteveRiley]

Does it sound like a boot splashing in the water?

On a serious note... what kind of sound?

[obedlink]

sound like when you disconnect or connect your speakers to the jacks of the PC and your sound system is turned on.

[SteveRiley]

Hm. Possibly a 60 Hz hum, like this? https://www.youtube.com/watch?v=SVZ2P0KsLic