From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mikael Magnusson Subject: Re: [PATCH 1/5] emu10k1 SB Live: Master volume and front channels via fxbus 8,9 Date: Wed, 23 Feb 2005 09:57:42 +0100 Message-ID: <421C4586.5090000@glocalnet.net> References: <421A3A3A.6070009@glocalnet.net> <1109109856.31071.44.camel@krustophenia.net> Reply-To: alsa-devel@alsa-project.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Received: from mail.perex.cz (gate.perex.cz [82.113.61.162]) by alsa.alsa-project.org (ALSA's E-mail Delivery System) with ESMTP id 28BAC1DD for ; Wed, 23 Feb 2005 09:57:43 +0100 (MET) Received: from mulder.hem.za.org (unknown [84.217.31.84]) by gate.perex.cz (Perex's E-mail Delivery System) with ESMTP id BDBC258DCF for ; Wed, 23 Feb 2005 09:57:42 +0100 (MET) Received: from skinner.hem.za.org ([192.168.0.2]) by mulder.hem.za.org with esmtp (Exim 4.34) id 1D3sL0-0000zj-W2 for alsa-devel@alsa-project.org; Wed, 23 Feb 2005 09:57:43 +0100 Received: from localhost ([127.0.0.1]) by skinner.hem.za.org with esmtp (Exim 4.34) id 1D3sL0-0002rg-HN for alsa-devel@alsa-project.org; Wed, 23 Feb 2005 09:57:42 +0100 In-Reply-To: Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Jaroslav Kysela wrote: > On Tue, 22 Feb 2005, Lee Revell wrote: > > >>There are two separate issues that the patch addresses. One is that >>unlike the Audigy configuration, the driver does not use separate FX >>buses for front output and PCM. So attenuating the front channels will >>attenuate *all* PCM samples. This has to be fixed in the driver. And >>it's essentially zero cost as the extra FX buses and GPRs are available. > > > Sorry, but I don't understand very well why we need to have "PCM mix" FX > buses. We can do this "down-mix" in the DSP code, but it's better to do it > in application. My original DSP code for emu10k1 have only front, rear, > center+lfe FX buses (6). I must miss something important here. > I don't understand what you mean with "PCM mix". Are you thinking of the default output which are up-mixed to 5.1? The patch doesn't down-mix 5.1 to front or something like that. It adds two fx inputs that are routed to front only and not up-mixed to 5.1. This is how the Audigy driver works. It also can make the configuration file a little cleaner, since it doesn't have to mute the up-mixed outputs. /Mikael ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click