From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rene Herman Subject: Re: What does 0dB refer to? (Logitech USB Speakers) Date: Wed, 16 Apr 2008 16:29:03 +0200 Message-ID: <48060D2F.2000701@keyaccess.nl> References: <20080411204610.GA32413@tango.0pointer.de> <20080414172839.GA26513@tango.0pointer.de> <4803C78A.3020109@superbug.co.uk> <200804150552.13578.faber@faberman.de> <20080415131203.GA2818@localhost> <4804BCB8.9060707@keyaccess.nl> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from smtpq2.groni1.gr.home.nl (smtpq2.groni1.gr.home.nl [213.51.130.201]) by alsa0.perex.cz (Postfix) with ESMTP id A53BC24437 for ; Wed, 16 Apr 2008 16:26:08 +0200 (CEST) In-Reply-To: <4804BCB8.9060707@keyaccess.nl> 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 On 15-04-08 16:33, Rene Herman wrote: > mute/minimal. Bit of a maintenance chore, and the usefulness depends on > how much level variation there actually is generally. Are we in essence > only talking about Lennart's buggy USB crap or is this more involved? On that note, I just acquired an Audigy 2 (SB0240) that I'm testing with and now that I'm paying attention to it due to this thread -- its 0 dB setting is very significantly louder (with everything behind the line-out constant ofcourse) than the 0 dB setting on my TerraTec DMX. James, I believe you are the emu10k1 person? Data: TerraTec DMX = ESS Canyon3D (ES1970MS-3D) + Sigmatel STAC9704T Creative Audigy 2 (SB0240) = Creative CA0102-ICT + Sigmatel STAC9721T (+ Crystal CS4382-KQ which seems to provide digital attenuation as well) At 0 dB master the Audigy 2 is much louder than the DMX is and audibly distorts. Judging by hearing, keeping the master at -16 dB (60 in the integer scale) gets things about the same. Was that scale provided by datasheet or just guessed? Especially the distortion would seem to indicate that something is actually doing analogue amplification at the 0 dB ALSA setting... Rene.