From mboxrd@z Thu Jan 1 00:00:00 1970 From: Raymond Yau Subject: Re: Alsamixertest Date: Tue, 5 Oct 2010 09:50:09 +0800 Message-ID: References: <4C9F6409.6010400@aknet.ru> <20100927005858.GD21247@sirena.org.uk> <4CA0221D.6030208@aknet.ru> <4CA306CB.1090305@canonical.com> <4CA9877F.7060009@canonical.com> <4CA9C22A.2010104@ladisch.de> <4CA9C7BE.7020804@canonical.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ew0-f51.google.com (mail-ew0-f51.google.com [209.85.215.51]) by alsa0.perex.cz (Postfix) with ESMTP id 27D371038F2 for ; Tue, 5 Oct 2010 03:50:10 +0200 (CEST) Received: by ewy21 with SMTP id 21so2378268ewy.38 for ; Mon, 04 Oct 2010 18:50:09 -0700 (PDT) In-Reply-To: <4CA9C7BE.7020804@canonical.com> 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 2010/10/4 David Henningsson > On 2010-10-04 14:01, Clemens Ladisch wrote: > > David Henningsson wrote: > >> On 2010-10-02 04:11, Raymond Yau wrote: > >>> It seem that the program keep complain about those controls without dB > scale > >>> (e.g. AC97 3D Control - depth and rear depth , .) with the emulated > intel8x0 > >>> driver and no volume control with the emulated sb16 in virtualbox > >> > >> It's a righteous warning if you ask me - all volume controls should > >> provide dB information, > > > > But "3D Depth" and some other controls are not volume controls and are > > not measured in dB. > > > >> or we don't know what they actually do. > > > > Where "we" = "generic software like PA". Non-standard controls can be > > controlled only by hardware-specific tools or by the user. > > Exactly, this is a test tool that checks whether the mixer control names > and dB information live up to PulseAudio's expectations. That's the > tool's purpose. > > Given some thought, perhaps the application warning should be removed. > It might be that it should only require dB information for the controls > it actually wants to test (i e Master, PCM etc)...what do you think? > > -- > David Henningsson, Canonical Ltd. > http://launchpad.net/~diwic > But some drivers (e.g. ISA drivers ) does not provide dB info for "Master" and "Capture" volume control There are different model of sound cards using snd-sb16 driver SB16 support joint duplex , only 16 bit playback and 8 bit capture instead of 16bits playback and capture your runtest.sh use "-q" option and I had spend some time to discover the overrun occur during arecord with sb16 inside virtualbox