From owner-freebsd-questions@FreeBSD.ORG Mon Sep 26 00:07:14 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D92D816A454 for ; Mon, 26 Sep 2005 00:07:14 +0000 (GMT) (envelope-from sandy@krvarr.bc.ca) Received: from szamoca.krvarr.bc.ca (szamoca.krvarr.bc.ca [142.179.111.232]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2F6A443D48 for ; Mon, 26 Sep 2005 00:07:12 +0000 (GMT) (envelope-from sandy@krvarr.bc.ca) Received: from szamoca.krvarr.bc.ca (localhost [127.0.0.1]) by szamoca.krvarr.bc.ca (8.13.1/8.12.11) with ESMTP id j8Q075qg046035; Sun, 25 Sep 2005 17:07:05 -0700 (PDT) (envelope-from sandy@szamoca.krvarr.bc.ca) Received: (from sandy@localhost) by szamoca.krvarr.bc.ca (8.13.1/8.12.11/Submit) id j8Q0705R046032; Sun, 25 Sep 2005 17:07:00 -0700 (PDT) (envelope-from sandy) From: Sandy Rutherford MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <17207.15268.579981.565564@szamoca.krvarr.bc.ca> Date: Sun, 25 Sep 2005 17:07:00 -0700 To: freebsd-questions@freebsd.org In-Reply-To: <44zmq9i1bo.fsf@be-well.ilk.org> References: <17196.47787.731732.312437@satchel.alerce.com> <44zmq9i1bo.fsf@be-well.ilk.org> X-Mailer: VM 7.07 under Emacs 21.3.1 X-krvarr.bc.ca-MailScanner-Information: Please contact postmaster@krvarr.bc.ca for more information. X-krvarr.bc.ca-MailScanner: Not scanned: please contact postmaster@krvarr.bc.ca for details. X-krvarr.bc.ca-MailScanner-From: sandy@szamoca.krvarr.bc.ca Cc: hartzell@alerce.com Subject: Re: hints for troubleshooting poor sound quality. X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Sep 2005 00:07:15 -0000 >>>>> On 19 Sep 2005 10:23:07 -0400, >>>>> Lowell Gilbert said: > George Hartzell writes: >> I've set up an ASUS small form factor machine based around an P4S8L >> ... >> >> The machine has two mini-jacks, one in the front and one in the >> back. If I plug a set of headphones into the front jack I hear all >> kinds of clicks and whirs and buzzing. They seem to correlate with >> drive activity, cd activity, and maybe even the cpu fan. The >> connector on the back seems quieter, but I still hear a bit of >> noise. >> >> I hear less noise on a set of sony powerer-subwoofer-and-tweeter >> speakers, but it's still noticable. >> >> ... > Well, yes, it *is* electrical interference on the motherboard. You > may be able to reduce its impact, though. Reducing the amplifier gain > (ogain in the mixer(8) output) may help, for example. Also, does > playing digital audio see this effect, or only playing CDs? If the > latter, you can switch to digital extraction for playing CDs (most > software doesn't support it, but some does) and avoid the > interference. Would using an external USB audio device be another option? Last time that I checked, FreeBSD support for USB sound was not ready for prime time. However, I don't know what the lastest state of affairs is. Sandy