From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hui Wang Subject: Re: 2 speakers are assigned to the same DAC, this can't support 4.0/2.1 channles Date: Fri, 12 Jun 2015 11:32:04 +0800 Message-ID: <557A52B4.3080505@canonical.com> References: <5576B419.5010505@canonical.com> <5576E81F.9070703@canonical.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from youngberry.canonical.com (youngberry.canonical.com [91.189.89.112]) by alsa0.perex.cz (Postfix) with ESMTP id 80DBF266638 for ; Fri, 12 Jun 2015 05:32:12 +0200 (CEST) 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: Raymond Yau Cc: Takashi Iwai , ALSA Development Mailing List , David Henningsson List-Id: alsa-devel@alsa-project.org On 06/12/2015 09:34 AM, Raymond Yau wrote: >>>> The alsa-info.txt for that Dell machine is at >>> http://pastebin.ubuntu.com/11667982/ >>> >>> The subwoofer is also at mono pin complex, are there any low pass filter >>> for the subwoofer or vendor coeff need to be set ? >> I don't know it, I guess there is no hardware filter, it will work with > the software low pass filter in the pulseaudio. > The funcional block diagram indicate equaliser is only connected to port D > This mean only the internal speaker can use high pass filter > > Do you mean your can hear high frequency from the subwoofer of alc255 ? I am not sure about it, but enable/disable the SW lfe filter will make the sound of subwoofer different > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@alsa-project.org > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > >