Audio capture problem on beaglebone, when playback is ok.

Mehmet Kurnaz15096

Hello all,

I have custom AM335x card as like as beaglebone. I use Android-2.3.4 os. I need to use line1 or line2 for audio capture. I use MCASP0 and I2C2 and there is no problem, audio output is ok. Bu I can't record anything from PC out(it is not mic input, so I use line).

"alsa_arecord 1.wav -d 10 " command runs without any problem. But I couldn't hear anything when use "alsa_aplay 1.wav". I look for file as raw, I see all of them as 0x80 after wav header. I checked codec(tlc30aic3x) audio input with prob, it is ok.

Thanks.

Mehmet Kurnaz

over 12 years ago

0 Vishveshwar Bhat over 12 years ago

TI__Genius 10210 points

Is record using Sound Recorder application working?

0 Mehmet Kurnaz15096 over 12 years ago in reply to Vishveshwar Bhat

Intellectual 560 points

Vishveshwar;

I use "alsa_arecord" application, it is linked(symbolic) to "alsa_aplay" application. I think, it should work.

Thanks.

Mehmet

0 Mehmet Kurnaz15096 over 12 years ago in reply to Mehmet Kurnaz15096

Intellectual 560 points

Vishveshwar,

I found problem. It's my mistake about pinmux of McASP0_AXR2 for capture. But I have another problem about capture. I wonder about mic input instead of line input. How can I use mic input? I couldn't find any register for using opamp for preamplifier for mic inputs instead of line.

Thanks

Mehmet Kurnaz

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Audio capture problem on beaglebone, when playback is ok.