From mboxrd@z Thu Jan 1 00:00:00 1970 From: Raymond Yau Subject: Re: Verifying mixer dB data/Invalid dB data from USB cards, especially Aureon 5.1 MkII Date: Sun, 28 Feb 2010 15:32:12 +0800 Message-ID: <4f3252891002272332n420e835fp4dd571742db47f92@mail.gmail.com> References: <4f3252891002171748tdcaa87n4d11d9880c0043e3@mail.gmail.com> <4f3252891002172215j7b85313ci3626a1bdad5c040c@mail.gmail.com> <20100218181322.GB5606@tango.0pointer.de> <4f3252891002190257u608073c3l48f2251d8a6458ee@mail.gmail.com> <20100219151328.GC25873@tango.0pointer.de> <4f3252891002201949k48e0208fw40590803ac1a8192@mail.gmail.com> <20100221193933.GA31800@tango.0pointer.de> <4f3252891002222047g33ecdb74qce6a997ea5792c0@mail.gmail.com> <20100223222004.GA5313@tango.0pointer.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pz0-f197.google.com (mail-pz0-f197.google.com [209.85.222.197]) by alsa0.perex.cz (Postfix) with ESMTP id EF4A924445 for ; Sun, 28 Feb 2010 08:32:14 +0100 (CET) Received: by pzk36 with SMTP id 36so1158180pzk.8 for ; Sat, 27 Feb 2010 23:32:13 -0800 (PST) In-Reply-To: <20100223222004.GA5313@tango.0pointer.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-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org 2010/2/24 Lennart Poettering > On Tue, 23.02.10 12:47, Raymond Yau (superquad.vortex2@gmail.com) wrote: > > > Are you suggesting that on all drivers the the index part of a > snd_mixer_selem_id_t directly relates to the subdevice id of a PCM > stream on the same card? Is that true? Jaroslav, Clemens, Takashi, can > you say something about that? > > (tbh I find that very unlikely, given that the device index would not be > encoded then) > > Lennart > > Those are the per voice volume control of the hardware mixing sound card This is a little bit different from the pulse pre-application volume control . It seem that pulseaudio allow the application open only one audio stream , but this per voice volume control allow application to open more than one audio stream e.g. Skype need to play the human voice and the ringing bell and it have to open two audio streams using either two hw devices or dmix