From mboxrd@z Thu Jan 1 00:00:00 1970 From: Clemens Ladisch Subject: Re: Verifying mixer dB data/Invalid dB data from USB cards, especially Aureon 5.1 MkII Date: Wed, 24 Feb 2010 10:00:49 +0100 Message-ID: <4B84EAC1.8040701@ladisch.de> References: <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> <4f3252891002202001gb6df8cg6c023c52e7d8394a@mail.gmail.com> <20100221192951.GD30380@tango.0pointer.de> <4B83A912.1050501@ladisch.de> <20100223223234.GB5313@tango.0pointer.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from out2.smtp.messagingengine.com (out2.smtp.messagingengine.com [66.111.4.26]) by alsa0.perex.cz (Postfix) with ESMTP id 1E11A1038AA for ; Wed, 24 Feb 2010 10:00:53 +0100 (CET) Received: from compute2.internal (compute2 [10.202.2.42]) by gateway1.messagingengine.com (Postfix) with ESMTP id 2F682E2311 for ; Wed, 24 Feb 2010 04:00:52 -0500 (EST) Received: from [10.1.2.38] (srv004.schk01.int.dmc-one.com [85.232.8.141]) by mail.messagingengine.com (Postfix) with ESMTPSA id E07F3247BE for ; Wed, 24 Feb 2010 04:00:50 -0500 (EST) In-Reply-To: <20100223223234.GB5313@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 Lennart Poettering wrote: > On Tue, 23.02.10 11:08, Clemens Ladisch (clemens@ladisch.de) wrote: > > Lennart Poettering wrote: > > > Unfortunately there is no way from the simple mixer to the lower level > > > mixer. > > > > From the check_unplugged function in alsa-utils/alsamixer/mixer_widget.c: > > > > err = snd_mixer_get_hctl(mixer, mixer_device_name, &hctl); > > if (err >= 0) > > ctl = snd_hctl_ctl(hctl); > > But that still doesn't give me a hint which snd_ctl_eleme_t belongs to > which snd_mixer_eleme_t, does it? Not really; the point of the simple mixer interface is to abstract away some of the ctl naming conventions. > > > It would be great if the smixer would include some API that gives me a > > > hint to which device/subdevice a specific snd_mixer_elem_t belongs to. > > > > Often, there is no 1:1 correspondence between mixer elements and PCM > > devices. Only mixer controls with interface PCM (not MIXER) have (sub-) > > device numbers, and at the moment this is used only for controls that > > are associated with the streams of hardware-mixing-capable cards. > > Which are not that many, right? Not HDA at least? No, most recent hardware was designed for software mixing. Only the snd-emu10k1, snd-via82xx and snd-ymfpci drivers implement such controls. Regards, Clemens