Re: [linux-audio-user] hum from laptop soundcard

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Subject: Re: [linux-audio-user] hum from laptop soundcard
From: Brian Redfern (bredfern_AT_calarts.edu)
Date: Sat Apr 19 2003 - 03:00:48 EEST

I use the quattro with my laptop and its very quiet.

http://www.brianredfern.org

On Fri, 18 Apr 2003, alex dray wrote:

> i think you're out of luck...the point of laptop architecture is to squish
> everything together....with a monitor and usb (which is fairly high voltage)
> so close to an integrated audio card, you cannot avoid magnetic influence as
> shielding at this level is practically impossible....you're best bet (and
> not a very good solution) is to get a breakout box so the actual dac is
> physically outside the laptop. If you come up with better solution please
> let me know,its a problem that frequently drives me nuts
>
>
>
>
> >From: Ben Saylor <bsaylor_AT_Macalester.edu>
> >Reply-To: linux-audio-user_AT_music.columbia.edu
> >To: linux-audio-user_AT_music.columbia.edu
> >Subject: [linux-audio-user] hum from laptop soundcard
> >Date: Fri, 18 Apr 2003 13:57:06 +0200
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> >
> >Hi,
> >
> >I have a new Dell laptop with a headphone jack as the only external
> >audio output. With headphones, the sound quality is good and there is
> >little noise to be heard. However, if I plug in my monitors, the
> >output crackles and hums, regardless of the mixer levels. There is
> >217 hz constant hum, a 125 hz hum when moving windows, and a 689 hz
> >whine when I run Pd. The output crackles when I move the mouse
> >(external USB). I just noticed that it goes away when I unplug the AC
> >adaptor. I think I remember a similar problem coming up on this list
> >before, but I had no luck searching the archives. How can I solve
> >this?
> >
> >Thanks,
> >Ben
>
>
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