From owner-freebsd-multimedia@FreeBSD.ORG Fri Oct 7 18:05:52 2005 Return-Path: X-Original-To: freebsd-multimedia@freebsd.org Delivered-To: freebsd-multimedia@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5CCF516A41F; Fri, 7 Oct 2005 18:05:52 +0000 (GMT) (envelope-from skywizard@MyBSD.org.my) Received: from tomoyo.MyBSD.org.my (tomoyo.mybsd.org.my [202.157.186.227]) by mx1.FreeBSD.org (Postfix) with ESMTP id C4F0843D46; Fri, 7 Oct 2005 18:05:51 +0000 (GMT) (envelope-from skywizard@MyBSD.org.my) Received: from localhost (localhost [127.0.0.1]) by tomoyo.MyBSD.org.my (Postfix) with ESMTP id 4331D6CC26; Sat, 8 Oct 2005 02:06:24 +0800 (MYT) Received: from tomoyo.MyBSD.org.my ([127.0.0.1]) by localhost (tomoyo.MyBSD.org.my [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 52293-05; Sat, 8 Oct 2005 02:06:21 +0800 (MYT) Received: from kasumi.MyBSD.org.my (kasumi.MyBSD.org.my [IPv6:2001:328:2002:aa2::1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by tomoyo.MyBSD.org.my (Postfix) with ESMTP id C8C516CC25; Sat, 8 Oct 2005 02:06:19 +0800 (MYT) Date: Sat, 8 Oct 2005 02:06:26 +0800 From: Ariff Abdullah To: Alexander Leidinger Message-Id: <20051008020626.60d4d937.skywizard@MyBSD.org.my> In-Reply-To: <20051007094228.6dp859nhcg8gsow0@netchild.homeip.net> References: <20051006141525.4171b911.skywizard@MyBSD.org.my> <4345C235.8060205@freebsd.org> <20051007090957.28da4c9e.skywizard@MyBSD.org.my> <4345D8E0.2020101@freebsd.org> <20051007104020.54184b39.skywizard@MyBSD.org.my> <20051007094228.6dp859nhcg8gsow0@netchild.homeip.net> Organization: MyBSD X-Mailer: /usr/local/lib/ruby/1.8/net/smtp.rb Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Virus-Scanned: by amavisd-new-antivirus-mail-gateway at TOMOYO.MYBSD.ORG.MY Cc: freebsd-multimedia@freebsd.org, davidxu@freebsd.org, noackjr@alumni.rice.edu Subject: Re: DAC1 / DAC2 for ex137x - ES1370/1/2/3 , CT5880/CT4730(EV1938) X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 07 Oct 2005 18:05:52 -0000 On Fri, 07 Oct 2005 09:42:28 +0200 Alexander Leidinger wrote: > > A thought comes into my mind... > > Stupid as I am sometimes, I thought so far the bad sound quality of my > SoundBlaster PCI (128 or 512 ... damn, I have to look it up at home) > is some kind of hardware problem in my PC... I thought this, because > in Windows it sounds as bad as with FreeBSD. Ok, Windows is bad, but > regarding the multimedia topic I've never seen such bad behavior from > Windows XP. That's the reason for thinking it's a hardware problem. > I have lots of dropouts in Windows, mostly because of VIA motherboards and particularly because of bad driver. It amaze me that this soundcard sound alot better in FreeBSD, with correct tuning and configuration. > But now I'm not sure anymore. I have PREEMPTION in my kernel. And it > doesn't sound like stuttering. It sounds like distortion. I don't know > how to describe this further. It seems it is related to activity on > the PCI bus. > > Does this sound like a problem which can be solved with > latency_timer/slave channels? > Most likely.. especially with VIA motherboards. Increasing default buffersize also can help but usually it's a sign of bad PCI timing. I don't have any problem with Intel boards even sharing the interrupt with others. > I think I have to get some time at Sunday to give it a try... > You won't regret it. This is one of the cheap / best sounding soundcards ever exist. http://www.pcavtech.com/soundcards/summary/index.htm -- Ariff Abdullah MyBSD http://www.MyBSD.org.my (IPv6/IPv4) http://staff.MyBSD.org.my (IPv6/IPv4) http://tomoyo.MyBSD.org.my (IPv6/IPv4)