Audio In of Beagleboard xM Rev.C is not working

shravan kulkarni

hi all,

i have a beagleboard xm rev.c which is ported on to dvsdk 4.01, angstrom linux kernel ver.2.6.32 running on it.

when i record voice in beagleboard using arecord command and play it back i hear only noise and not the voice which was recorded.

Headset Mic was used for the recording purpose.

voltage level when measured at the audio-in port is found to be 0.02V (both left and right).

optimum level required for voice recording is around 2V-2.2V

how do i solve this problem??

regards,

shravan

over 13 years ago

0 Vaibhav Bedia over 13 years ago

TI__Expert 5290 points

Hi,

What sort of microphone are you using? Beagleboard supports audio capture using a powered microphone or the output from a PC/MP3 player via Line-In cable.

Regards,

Vaibhav

0 shravan kulkarni over 13 years ago in reply to Vaibhav Bedia

Prodigy 145 points

Hi Vaibhav,

Thank you for your reply. I'm using normal headset with microphone which is not powered by any external source. it is powered by the voltage which is available at the audio-in port. is it not possible to record using microphone which is not powered externally.

sorry for my late response for your query.

thanking you,

shravan kulkarni

0 shravan kulkarni over 13 years ago in reply to Vaibhav Bedia

Prodigy 145 points

Hi Vaibhav,

sorry for my late response for your query.

thanking you,

shravan kulkarni

0 Vaibhav Bedia over 13 years ago in reply to shravan kulkarni

TI__Expert 5290 points

Shravan,

You can use a line-in from the PC. Mics need to be externally powered.

Regards,

Vaibhav

0 pp zhao over 12 years ago

Prodigy 120 points

hello, I have the same problem with you, have you slove it? Can you share your solution with me? And how did you test the voltage level on the beagleboard? Is it the voltage between GND and C92?

I use the headset mic, and built DVSDK, linux kernel version is 2.6.32 too.

Thank you!

0 Amaresh H S over 11 years ago in reply to pp zhao

Prodigy 20 points

hello

can u please tell me the voltage level with which we should operate the audio jack of beagleboard when an external mic is connected?

0 pp zhao over 11 years ago in reply to Amaresh H S

Prodigy 120 points

Sorry, I have no board now, I have not done it for a long time.

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Audio In of Beagleboard xM Rev.C is not working