From mboxrd@z Thu Jan 1 00:00:00 1970 From: Liam Girdwood Subject: Re: asoc: no valid backend routes for PCM: SDP4430 Media Date: Tue, 7 Jun 2011 09:38:35 +0100 Message-ID: <4DEDE38B.2040408@ti.com> References: <76445.36914.qm@web161713.mail.bf1.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from devils.ext.ti.com (devils.ext.ti.com [198.47.26.153]) by alsa0.perex.cz (Postfix) with ESMTP id 9429624399 for ; Tue, 7 Jun 2011 10:38:41 +0200 (CEST) In-Reply-To: <76445.36914.qm@web161713.mail.bf1.yahoo.com> 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: hong zhang Cc: "alsa-devel@alsa-project.org" List-Id: alsa-devel@alsa-project.org On 07/06/11 01:13, hong zhang wrote: > List, > > After capturing data from DMIC on OMAP4 blaze board with kernel 2.6.38 and save wav data to 38.wav. > > But aplay complains "no valid backend routes". See following, > > $aplay -f dat 38.wav > [ 157.167724] asoc: no valid backend routes for PCM: SDP4430 Media > aplay: main:654: audio open error: Invalid argument > This means you have not configured an audio route for playback (i.e. the audio is not routed anywhere from pcm hw:0,0). Use alsamixer and configure the kcontrols to define the audio path. The kcontrol mappings to audio paths are detailed here for OMAP4 :- http://omappedia.org/wiki/Audio_Drive_Arch Liam