Hello Clemens,

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I get following error on console if i use plug:mcasp3 instead plughw:0,0 ALSA lib pcm.c:2211:(snd_pcm_open_noupdate) Unknown PCM mcasp3

/********************************************************/ //alsaParams->playback_device = strdup("plughw:0,0"); /*commented*/ alsaParams->playback_device = strdup("plug:mcasp3"); snd_pcm_hw_params_alloca(&alsaParams->hwparams_playback); /*Open PCM Playback device*/ if (snd_pcm_open(&alsaParams->playback_handle, alsaParams->playback_device, alsaParams->stream, alsaParams->device_mode) < 0) { printf("Error opening PCM device %s\n", alsaParams->playback_device); return NULL; }

/********************************************************/

# aplay -l **** List of PLAYBACK Hardware Devices **** card 0: EVM [TI81XX EVM], device 0: McASP3 bdrsecodec-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: EVM [TI81XX EVM], device 1: McASP4 bdrsecodec-1 [] Subdevices: 1/1 Subdevice #0: subdevice #0

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Regards Irfan

________________________________________ From: Clemens Ladisch [clemens@ladisch.de] Sent: Wednesday, March 09, 2011 5:15 PM To: Irfan Shaikh Cc: alsa-devel@alsa-project.org Subject: Re: [alsa-devel] Query about Playback device name

Irfan Shaikh wrote:

aplay uses following device "aplay -Dplug:mcasp3 411.2Kbps-44.1Khz-16bits-2CH-PCM.wav"

I want to use same device i.e "plug:mcasp3" in my plaback application

Can i use following section of code to use "plug:mcasp3" as playback device?

alsaParams->playback_device = strdup("plug:mcasp3");
if (snd_pcm_open(&alsaParams->playback_handle,
                 alsaParams->playback_device,

Yes.

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Regards, Clemens

YES.... I am running my application as well as aplay on the same embedded platform with same user

________________________________________ From: Clemens Ladisch [clemens@ladisch.de] Sent: Wednesday, March 09, 2011 7:52 PM To: Irfan Shaikh Cc: alsa-devel@alsa-project.org Subject: Re: [alsa-devel] Query about Playback device name

Irfan Shaikh wrote:

I get following error on console if i use plug:mcasp3 instead plughw:0,0 ALSA lib pcm.c:2211:(snd_pcm_open_noupdate) Unknown PCM mcasp3

Do aplay and your program run on same computer as the same user?

Regards, Clemens

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