From mboxrd@z Thu Jan 1 00:00:00 1970 From: Clemens Ladisch Subject: Re: Mixer volume/decibel mapping Date: Tue, 25 May 2010 10:21:58 +0200 Message-ID: <4BFB88A6.8040701@ladisch.de> References: <201005191834.57919.vand2@gmx.de> <201005201141.28755.vand2@gmx.de> <4BF629B3.9020904@ladisch.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from out1.smtp.messagingengine.com (out1.smtp.messagingengine.com [66.111.4.25]) by alsa0.perex.cz (Postfix) with ESMTP id 11B6110384D for ; Tue, 25 May 2010 10:22:17 +0200 (CEST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: James Courtier-Dutton Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org James Courtier-Dutton wrote: > On 21 May 2010 07:35, Clemens Ladisch wrote: >> James Courtier-Dutton wrote: >>> For the cards that do have this 32bit linear value, a simple lookup >>> table is used in the kernel code to convert it to 256 step values. >> >> Which driver is this? It should be changed to use the full range. > > All creative and emu cards with a DSP. > They use a lookup table in the driver. Okay, with the latest driver, try: modprobe snd-emu10k1 high_res_gpr_volume=1 I did not yet enable this by default because alsactl has a bug when restoring mixer values saved by the old driver, and alsamixer currently thinks it is a good idea to let you step through two billion values. Regards, Clemens