AIC34 multichannel operation

Vishwas HC

Hi All,

In our product we are using AIC34 which supports two stereo channels. We should be able to play two audio at the same time.

We have TI AM335X EVM where AIC3106 is used, in this case I see nodes like /dev/sndPCMC0D0p and /dev/snd/PCMC0D0c for playback and capture respectively.

To meet our end product requirement, we have AIC34 evaluation board interfaced with the beagle bone McASP0. In this case I should be able to create and open two nodes like /dev/snd/PCMC0D0p and /dev/sndPCMC0D1p in order to play two song simultaneously.

Is creation of two nodes and playing two audio at the same time is possible using ASoC framework?

I read in some books saying that creation of multiple nodes sndPCMC0D0p,sndPCMC0D1p,sndPCMC0D2p etc is possible. How to achieve this?

My end requirement would be create and open sndPCMC0D0p and sndPCMC0D1p nodes and play two independent song.

Please suggest. I appreciate your help regarding this as I am new to ASoC framework.

Regards,

Vishwas HC

over 13 years ago

0 Vaibhav Bedia over 13 years ago

TI__Expert 5290 points

Hi,

Vishwas HC said:
Is creation of two nodes and playing two audio at the same time is possible using ASoC framework?

Yes. It is possible but hasn't been verified on the EVM. You will need to make some changes in the ALSA drivers to make this work. The porting guide gives some guidelines on changes required http://processors.wiki.ti.com/index.php/TI81xx_PSP_Porting_Guide#Audio_driver_.28McASP.29

You can check the OMAP4 ALSA driver to see if already has such an implementation in place.

Regards,

Vaibhav

0 Vishwas HC over 13 years ago in reply to Vaibhav Bedia

Intellectual 270 points

Hi Vaibhav,

Thank you very much.

I will check the porting guide and OMAP4 ALSA driver as well and will get back if I have any question.

Regards,

Vishwas HC

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AIC34 multichannel operation