From mboxrd@z Thu Jan 1 00:00:00 1970 From: Colin Guthrie Subject: Re: wrong decibel data? Date: Thu, 10 Jun 2010 17:11:21 +0100 Message-ID: References: <4BFE7840.4070004@ladisch.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from lo.gmane.org (lo.gmane.org [80.91.229.12]) by alsa0.perex.cz (Postfix) with ESMTP id 22A4410398A for ; Thu, 10 Jun 2010 18:11:12 +0200 (CEST) Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1OMkLT-0007Kf-Rv for alsa-devel@alsa-project.org; Thu, 10 Jun 2010 18:11:08 +0200 Received: from brent.tribalogic.net ([78.86.109.144]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 10 Jun 2010 18:11:07 +0200 Received: from gmane by brent.tribalogic.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 10 Jun 2010 18:11:07 +0200 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: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org 'Twas brillig, and Raymond Yau at 10/06/10 04:16 did gyre and gimble: > Can you explain how PA handle the volume controls of ac97 codec ? > > PCM -34.5dB to +*12* dB > Master -46.5dB to 0dB > > The total dB range (PCM + MASTER) is -81dB to +*12*dB > > > Most user concern about recording without distrotion. (i.e. best result when > Capture Volume at 0dB , PCM and Master Volume at 0dB ) and they need where > are 0dB points I'm not 100% sure how this is handled, but I know it's not ignored. You'll have to ask Lennart directly or dig in the code to see for sure. Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited [http://www.tribalogic.net/] Open Source: Mandriva Linux Contributor [http://www.mandriva.com/] PulseAudio Hacker [http://www.pulseaudio.org/] Trac Hacker [http://trac.edgewall.org/]