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: Wed, 24 Feb 2010 11:49:47 +0800 Message-ID: <4f3252891002231949i1cfd6dd3h7c5e4b3dc7ba8bc8@mail.gmail.com> References: <20100216233825.GB23623@sirena.org.uk> <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> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-px0-f193.google.com (mail-px0-f193.google.com [209.85.216.193]) by alsa0.perex.cz (Postfix) with ESMTP id 0B0152432C for ; Wed, 24 Feb 2010 04:49:48 +0100 (CET) Received: by pxi31 with SMTP id 31so2364715pxi.26 for ; Tue, 23 Feb 2010 19:49:47 -0800 (PST) In-Reply-To: <4B83A912.1050501@ladisch.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 2010/2/23 Clemens Ladisch > Lennart Poettering wrote: > > > 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. > > > Regards, > Clemens > Just implementing those IFACE_PCM control for the driver is not enough for any practical use Will need an API which allow the application to change the hardware per stream volume in optimized way by calling one api ? ( e.g. those API is need for if wine want to implement the real hardware acclerated dsound for those hardware mixing sound cards which support at least 16 voices )