From mboxrd@z Thu Jan 1 00:00:00 1970 From: Massimo Del Fedele Subject: Re: Fix for Asus G75 notebook subwoofer Date: Wed, 07 Nov 2012 18:02:20 +0100 Message-ID: <509A941C.8060305@veneto.com> References: <509947A7.9080406@veneto.com> <509A641D.8070501@veneto.com> <509A8365.7060001@veneto.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from plane.gmane.org (plane.gmane.org [80.91.229.3]) by alsa0.perex.cz (Postfix) with ESMTP id C958F2650A7 for ; Wed, 7 Nov 2012 18:02:29 +0100 (CET) Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1TW91S-0000zL-26 for alsa-devel@alsa-project.org; Wed, 07 Nov 2012 18:02:38 +0100 Received: from host184-250-dynamic.0-87-r.retail.telecomitalia.it ([87.0.250.184]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 07 Nov 2012 18:02:38 +0100 Received: from max by host184-250-dynamic.0-87-r.retail.telecomitalia.it with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 07 Nov 2012 18:02:38 +0100 In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Il 07/11/2012 16:54, Takashi Iwai ha scritto: > > It's OK, just missing the stereo capability check in the mixer code, > but almost harmless. Which channel (left or right) of "surround" > mixer actually controls the volume of subwoofer on your machine? Both, as the volume control is at DAC level and not at pin one. aplay with channel test sound shows a 4 channels audio, driving subwoofer with both rear left and rear right data. If I lower left or right volume, just opposite channel goes to subwoofer. I guess that mono mixing is done at widget 0x3e (the hidden one). Massimo