From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Trimarchi Subject: Re: [Q] playing / recording mono on a stereo-only hardware Date: Sat, 30 Jan 2010 17:29:05 +0100 Message-ID: <4B645E51.900@gandalf.sssup.it> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from panicking.kicks-ass.org (unknown [77.224.194.88]) by alsa0.perex.cz (Postfix) with ESMTP id 603F224337 for ; Sat, 30 Jan 2010 17:29:13 +0100 (CET) In-Reply-To: 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: Guennadi Liakhovetski Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Guennadi Liakhovetski wrote: > Hi > > I know this question belongs rather to alsa-users, and I did ask it there, > but got no solution so far. Maybe someone here can help. > > The recently posted SuperH SIU driver only supports stereo playback and > capture (channels_min = channels_max = 2). Is there a way to tell alsa-lib > to duplicate the mono-channel during playback and to mix recorded channels > (or use one of them), if mono recording is requested? > I'm not an expert but I think that you can use plughw support of alsa-lib pcm.record { type plug slave { pcm record_hw } route_policy average rate_converter "linear" } I think that automatically change rate and channel for supporting mono channel too Michael > Thanks > Guennadi > --- > Guennadi Liakhovetski, Ph.D. > Freelance Open-Source Software Developer > http://www.open-technology.de/ > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@alsa-project.org > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > >