audio capture problems using Audio Cape Rev A1 with BBB

[Chris Yungmann]

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]

Update: got recording working after rebooting, it is just very quiet. Any advice?

Thanks!

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[Maxim Podbereznyy]

alsamixer

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[Christopher Yungmann]

Which alsamixer channels should I be looking at? There's dozens of them...

[Maxim Podbereznyy]

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