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: Tue, 22 Feb 2005 12:38:03 +0100 Message-ID: <421B199B.4090606@glocalnet.net> References: <421A3A3A.6070009@glocalnet.net> <421B073C.1090007@glocalnet.net> Reply-To: ALSA development 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 4C1D0172 for ; Tue, 22 Feb 2005 12:38:05 +0100 (MET) Received: from mulder.hem.za.org (unknown [84.217.19.155]) by gate.perex.cz (Perex's E-mail Delivery System) with ESMTP id EB2B7582A6 for ; Tue, 22 Feb 2005 12:38:04 +0100 (MET) Received: from skinner.hem.za.org ([192.168.0.2]) by mulder.hem.za.org with esmtp (Exim 4.34) id 1D3YMe-00026H-Dr for alsa-devel@alsa-project.org; Tue, 22 Feb 2005 12:38:04 +0100 Received: from localhost ([127.0.0.1]) by skinner.hem.za.org with esmtp (Exim 4.34) id 1D3YMd-0002gI-Og for alsa-devel@alsa-project.org; Tue, 22 Feb 2005 12:38:03 +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 development List-Id: alsa-devel@alsa-project.org Jaroslav Kysela wrote: > On Tue, 22 Feb 2005, Mikael Magnusson wrote: > > >>Jaroslav Kysela wrote: >> ... >> >>I think a "Master Digital Volume" or separate controls for surround, >>center and lfe are needed. >> >>How are you otherwise going to implement a "Master Volume" control in >>user space if you allow the user to change for example "Wave Surround" >>and "Surround"? > > > As you noted here, the implemention of Master is only one abstraction view > for this device. Other users might use the card as two virtual PCM devices > (front = card1, rear = card2) and in this case is Master completely > useless for this example. > > The control API allow to lock the specific control for writing (and only > application which locked the control can write to it), thus the user space > implementation can use this feature. > > Jaroslav And how do I adjust the rear, center and lfe volumes if the controls are locked? Should I have to use the soft volume plugin? /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