Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760977AbZCPVWk (ORCPT ); Mon, 16 Mar 2009 17:22:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755715AbZCPVWb (ORCPT ); Mon, 16 Mar 2009 17:22:31 -0400 Received: from rhlx01.hs-esslingen.de ([129.143.116.10]:39469 "EHLO rhlx01.hs-esslingen.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753712AbZCPVWa (ORCPT ); Mon, 16 Mar 2009 17:22:30 -0400 Date: Mon, 16 Mar 2009 22:22:27 +0100 From: Andreas Mohr To: Takashi Iwai Cc: Andreas Mohr , Maxim Levitsky , linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org, Kernel Testers List Subject: Re: [alsa-devel] Bugs on aspire one A150 Message-ID: <20090316212227.GA29471@rhlx01.hs-esslingen.de> References: <20090316160208.GB4458@rhlx01.hs-esslingen.de> <20090316170015.GA9776@rhlx01.hs-esslingen.de> <20090316173000.GA25647@rhlx01.hs-esslingen.de> <20090316180638.GB25647@rhlx01.hs-esslingen.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Priority: none User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1489 Lines: 41 Hi, On Mon, Mar 16, 2009 at 09:28:39PM +0100, Takashi Iwai wrote: > At Mon, 16 Mar 2009 19:06:38 +0100, > Andreas Mohr wrote: > > I just tried connecting a headset and switching to E-Mic. > > What I can say is: > > - opposite levels does NOT happen there (E-Mic is "analog micro"-based, right?) > > - leaving E-Mic unplugged will actually record from i-Mic (due to properly > > working EAPD mechanism, right?) > > The record from mic-jack is via analog path. The phase-inversion > appears only for digital-mic, AFAIK. Thought so. > > One question still: is this a hardware defect (i.e. could this possibly > > be swapped cables of the microphone connector in this model or so? > > Not plausible but...), or is this an existing property > > of the HDA's dig-mic base? You indicated it's the latter I think... > > My guess is that it's a hardware implementation. > Maybe for the noise suppression via mic array. Not sure what this means. > The question is whether the left / right channels recorded from > digital mic are really raw data, or they are for modified data > (for differential, etc)... It's hard to guess without the actual > data. I don't quite follow you here. Is there anything I could do about this? Thanks, Andreas -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/