audio capture problems using Audio Cape Rev A1 with BBB

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Chris Yungmann

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Oct 31, 2014, 10:55:28 PM10/31/14
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Hello all,

I'm trying to get audio recording working and I am not having much luck.

I am using Robert C Nelson's 3.17.0-rc7-bone4 kernel on the BBB with the Audio Cape Rev A1. I have the headphone jack from my laptop hooked up to the Audio In jack on the Audio Cape, and am attempting to record with `arecord -t wav -c 2 44100 -f S16_LE -v k`. However, I just get silence. I'm not sure what alsamixer settings I should be adjusting or how to troubleshoot...

Playback works beautifully, just need to get recording working.

Thanks in advance!

- Chris

Christopher Yungmann

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Oct 31, 2014, 11:06:58 PM10/31/14
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Update: got recording working after rebooting, it is just very quiet. Any advice?

Thanks!

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Maxim Podbereznyy

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Nov 1, 2014, 2:02:10 AM11/1/14
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alsamixer

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Christopher Yungmann

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Nov 1, 2014, 1:51:35 PM11/1/14
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Which alsamixer channels should I be looking at? There's dozens of them...

Maxim Podbereznyy

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Nov 1, 2014, 3:27:54 PM11/1/14
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Wait. I believe Audio In at the cape means Line In, while your laptop gives the output for headphones. These two input/output are not compatible
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