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: Tue, 23 Feb 2010 13:12:25 +0800 Message-ID: <4f3252891002222112x3e6fbadcsf827521cf7199ef3@mail.gmail.com> References: <20100216233825.GB23623@sirena.org.uk> <4f3252891002171748tdcaa87n4d11d9880c0043e3@mail.gmail.com> <20100218023742.GC23637@tango.0pointer.de> <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> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-px0-f204.google.com (mail-px0-f204.google.com [209.85.216.204]) by alsa0.perex.cz (Postfix) with ESMTP id 780282433C for ; Tue, 23 Feb 2010 06:12:26 +0100 (CET) Received: by pxi42 with SMTP id 42so1642814pxi.5 for ; Mon, 22 Feb 2010 21:12:25 -0800 (PST) In-Reply-To: <20100221193933.GA31800@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 2010/2/22 Lennart Poettering > On Sun, 21.02.10 11:49, Raymond Yau (superquad.vortex2@gmail.com) wrote: > > > The most common onboard audio is HDA so this is not any exceptional cases > > > > Those HDA multi streaming feature are most users wanted in desktop > > enviornment, are pulseaudio really designed for deskop or just only for > > notebook and mobile ? > > > > The front panel green/pink jack can be used by one application while the > > rear panel audio jacks can be used to another application for surround or > > mic for karaoke > > I am not entirely convinced that this is really a common case. > > But anyway, there is nothing in PA that would limit it to not use > multiple parallel devices of a sound card at the same time, with the > exception that ALSA currently has no enumeration API which could > inform us which uses of the card are exclusive each other and which > ones are not. PA currently tries to open the sound card in all > combinations possible, assuming that EBUSY means it found an invalid > combination. if ( snd_pcm_info_get_subdevices_count(pcm_info) > 1 ) mean you can open the device more than one time since the device has more than 1 subdevice