From mboxrd@z Thu Jan 1 00:00:00 1970 From: Takashi Iwai Subject: Re: [PATCH 1/5] emu10k1 SB Live: Master volume and front channels via fxbus 8,9 Date: Wed, 23 Feb 2005 11:22:40 +0100 Message-ID: References: <421A3A3A.6070009@glocalnet.net> <1109109856.31071.44.camel@krustophenia.net> <421C4586.5090000@glocalnet.net> Mime-Version: 1.0 (generated by SEMI 1.14.5 - "Awara-Onsen") Content-Type: text/plain; charset=US-ASCII Received: from Cantor.suse.de (ns.suse.de [195.135.220.2]) by alsa.alsa-project.org (ALSA's E-mail Delivery System) with ESMTP id 604691DB for ; Wed, 23 Feb 2005 11:23:22 +0100 (MET) Received: from hermes.suse.de (hermes-ext.suse.de [195.135.221.8]) (using TLSv1 with cipher EDH-RSA-DES-CBC3-SHA (168/168 bits)) (No client certificate requested) by Cantor.suse.de (Postfix) with ESMTP id B5F3314D7BB7 for ; Wed, 23 Feb 2005 11:22:40 +0100 (CET) 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: Jaroslav Kysela Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org At Wed, 23 Feb 2005 10:00:49 +0100 (CET), Jaroslav wrote: > > On Wed, 23 Feb 2005, Mikael Magnusson wrote: > > > > 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. > > I see now. My behaviour was to "duplicate" front to surround with "Wave > Surround" controls and you propose to have FX buses which will route > signal to both front & rear and separate FX buses to route signal to > front only. > > I don't see the real benefit. Both cases are correct and the alsa-lib > configuration won't be much different. Anyway, if you feel that it's > better, then go ahead... IIRC, the problem was stated in the case that both front and multi-channel streams are output at the same time. I think this patch is fine (although not tested yet). At least, it will decrease the difference between Live and Audigy. Takashi ------------------------------------------------------- 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