It's like that ALL the time? Or just in that scene? It sounds like wideband interference, I was thinking it was from that ancient, unshielded computer and overhead fluorescent lights... but if it sounds like that in
every situation,
yes it's broken. That's the worst audio sample example I've ever heard. Something is
severely wrong.
I'll assume you wouldn't post for that being that way only once. So, yes it's broke. I think A560s came out in the beginning of '07, hopefully yours wasn't bought too long ago and is under warranty... It's got to be sent back. If you've dropped it or bashed it into anything, do your best to clean up the case before you send it back. Canon frequently refuses warranty service for mis-handling or abuse. If it's out of warranty, well, I guess you could ask what they want to fix it -- or never shoot video without stripping the audio track off. :-(
To check if your camera is under warranty, put in the serial # here:
Canon Online Repair Request (this probably doesn't work if it wasn't bought in the U.S.)Inside, these things are the pinnacle of Japanese electronics miniaturization. The odds of you being able to fix it, unless you're a capable engineer with experience disassembling cameras and soldering SMT (and have access to the proper equipment) is higher than winning the lottery.
Man, good luck!