From: Liam Girdwood <lrg@ti.com>
To: hong zhang <henryzhang62@yahoo.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
Subject: Re: asoc: no valid backend routes for PCM: SDP4430 Media
Date: Tue, 7 Jun 2011 09:38:35 +0100 [thread overview]
Message-ID: <4DEDE38B.2040408@ti.com> (raw)
In-Reply-To: <76445.36914.qm@web161713.mail.bf1.yahoo.com>
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
next prev parent reply other threads:[~2011-06-07 8:38 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-07 0:13 asoc: no valid backend routes for PCM: SDP4430 Media hong zhang
2011-06-07 8:38 ` Liam Girdwood [this message]
2011-06-07 19:59 ` hong zhang
2011-06-08 14:22 ` Liam Girdwood
2011-06-08 19:08 ` hong zhang
2011-06-09 9:42 ` Liam Girdwood
2011-06-09 17:45 ` hong zhang
2011-06-09 17:48 ` Liam Girdwood
2011-06-09 17:52 ` hong zhang
2011-08-19 7:53 ` asoc: no valid backend routes for PCM Sarika
2011-08-19 16:20 ` Liam Girdwood
[not found] ` <CAHgabbYxe-mzwhxiivj5Xmqdq3FQuZ3ZFhgU4wy_bCosm2BhwA@mail.gmail.com>
2011-08-22 10:54 ` Liam Girdwood
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