laptop noise (was Re: [linux-audio-user] intel core 2 duo and amd turion 64x2)

[carmen]

On Sat Mar 10, 2007 at 04:10:30PM -0500, Eric Dantan Rzewnicki wrote:
> On Sat, Mar 10, 2007 at 11:56:32AM -0800, Mark Knecht wrote:
> > On 3/10/07, Lee Revell <rlrevell at joe-job.com> wrote:
> > >On 3/10/07, Eric Dantan Rzewnicki <eric at zhevny.com> wrote:
> > >> One issue though, I'm getting a nasty zipper noise in one monitor
> > >> connected to the edirol ua-25 whenever any keyboard, trackpad, disk or
> > >> video activity happens. If I unplug from the power supply and run on
> > >> battery the noise goes away. Everything (laptop and 2 active monitors)
> > >> are on the same power strip. ua-25 and remote25 are usb powered. I
> > >> recall someone else reporting something similar recently.
> > >> Is there anything I can try to do to get rid of the noise when plugged
> > >> into power?
> > >I doubt it - it sounds like your laptop vendor used cheap noisy capacitors.
> > If you use high-end power strips with over-voltage protection like
> > from APX or other vendors then possibly putting them on separate power
> > strips might work.
> 
> I'll try that. Thanks for the suggestions ... not holding out much hope

a better-isolated sound card might fix the issue as well. ive heard plenty of noisy desktops/notebooks that were fixed with a proper pci/pcmcia card.. even if the plugs were still attached to the card/case rather than breakout...

maybe even a 3-pronged AC adaptor if youre using 2-pronged? kind of a long shot, but who knows...