From mboxrd@z Thu Jan 1 00:00:00 1970 From: Raymond Yau Subject: Re: Handling of the DXS controls in the via82xx driver Date: Thu, 1 Apr 2010 07:00:59 +0800 Message-ID: References: <4BAE8EF7.20204@gmx.de> <1269867371.6760.1367253675@webmail.messagingengine.com> <4BB0A970.7020600@gmx.de> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from mail-pw0-f51.google.com (mail-pw0-f51.google.com [209.85.160.51]) by alsa0.perex.cz (Postfix) with ESMTP id B086E10380C for ; Thu, 1 Apr 2010 01:01:00 +0200 (CEST) Received: by pwj7 with SMTP id 7so592124pwj.38 for ; Wed, 31 Mar 2010 16:00:59 -0700 (PDT) In-Reply-To: <4BB0A970.7020600@gmx.de> 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 Development Mailing List List-Id: alsa-devel@alsa-project.org 2010/3/29 Soeren D. Schulze > Clemens Ladisch wrote: > >> The bad thing about it is that 31,31 is a really bad setting for my > >> poorly engineered sound card. It distorts a lot. > > > > If the card cannot handle any loud output, then all outputs from any > > source must be restricted, so the logical place for lower volume would > > be the "Master" or "PCM" controls. > > The problem is rather that it cannot handle loud *input*. With loud > input from digital plus the respective DXS lever on high volume, it > apparently overdrives at a very early stage in the sound card. Master > and PCM do not help anything any more. > > The other workaround would probably be using softvol for reducing the > volume before it enters analog, but lowering the DXS levers is still > better IMHO. > > > Thank you > > S=F6ren > > did you set those per voice volume control to 0dB ? try to play a sine wave of full amplitude and record using analog loopback of ac97 codec and audacity to find out whether the sine wave is clipped