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@xxxxxxxxxxxxxx> > >Reply-To: linux-audio-user@xxxxxxxxxxxxxxxxxx > >To: linux-audio-user@xxxxxxxxxxxxxxxxxx > >Subject: [linux-audio-user] hum from laptop soundcard > >Date: Fri, 18 Apr 2003 13:57:06 +0200 > >MIME-Version: 1.0 > >Received: from roar.music.columbia.edu ([128.59.195.116]) by > >mc9-f14.bay6.hotmail.com with Microsoft SMTPSVC(5.0.2195.5600); Fri, 18 Apr > >2003 11:59:47 -0700 > >Received: from roar.music.columbia.edu (IDENT:mailman@localhost > >[127.0.0.1])by roar.music.columbia.edu (8.11.6/8.11.0) with ESMTP id > >h3IJ96Q28912;Fri, 18 Apr 2003 15:09:06 -0400 > >Received: from mail.Macalester.edu (imap.macalester.edu [141.140.1.16])by > >roar.music.columbia.edu (8.11.6/8.11.0) with ESMTP id h3IJ8nQ28895for > ><linux-audio-user@xxxxxxxxxxxxxxxxxx>; Fri, 18 Apr 2003 15:08:49 -0400 > >Received: from CONVERSION-DAEMON.mail.Macalester.edu by mail.Macalester.edu > >(PMDF V6.2 #30562) id <0HDJ00801Z4HTB@xxxxxxxxxxxxxxxxxxx> for > >linux-audio-user@xxxxxxxxxxxxxxxxxx; Fri, 18 Apr 2003 13:53:05 -0500 (CDT) > >Received: from std16.dorms7.macalester.edu (std16.dorms7.macalester.edu > >[141.140.107.16]) by mail.Macalester.edu (PMDF V6.2 #30562) with ESMTP id > ><0HDJ007EEZ4HGW@xxxxxxxxxxxxxxxxxxx> for > >linux-audio-user@xxxxxxxxxxxxxxxxxx; Fri, 18 Apr 2003 13:53:05 -0500 (CDT) > >X-Message-Info: UZmYcfFpTCewzfqvyl1d15R59mlxBfYY > >Message-id: <200304181357.06318.bsaylor@xxxxxxxxxxxxxx> > >User-Agent: KMail/1.5.1 > >Sender: linux-audio-user-admin@xxxxxxxxxxxxxxxxxx > >Errors-To: linux-audio-user-admin@xxxxxxxxxxxxxxxxxx > >X-BeenThere: linux-audio-user@xxxxxxxxxxxxxxxxxx > >X-Mailman-Version: 2.0.13 > >Precedence: bulk > >List-Help: > ><mailto:linux-audio-user-request@xxxxxxxxxxxxxxxxxx?subject=help> > >List-Post: <mailto:linux-audio-user@xxxxxxxxxxxxxxxxxx> > >List-Subscribe: > ><http://music.columbia.edu/mailman/listinfo/linux-audio-user>,<mailto:linux-audio-user-request@xxxxxxxxxxxxxxxxxx?subject=subscribe> > >List-Id: A list for linux audio users <linux-audio-user.music.columbia.edu> > >List-Unsubscribe: > ><http://music.columbia.edu/mailman/listinfo/linux-audio-user>,<mailto:linux-audio-user-request@xxxxxxxxxxxxxxxxxx?subject=unsubscribe> > >List-Archive: <http://music.columbia.edu/pipermail/linux-audio-user/> > >X-Original-Date: Fri, 18 Apr 2003 13:57:06 +0200 > >Return-Path: linux-audio-user-admin@xxxxxxxxxxxxxxxxxx > >X-OriginalArrivalTime: 18 Apr 2003 18:59:47.0194 (UTC) > >FILETIME=[AE502DA0:01C305DC] > > > >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 > > > _________________________________________________________________ > MSN 8 with e-mail virus protection service: 2 months FREE* > http://join.msn.com/?page=features/virus > >
