1

Is there any way that I can configure the jack on a Raspberry 2 into a microphone input ? The goal is to gather the sound data from a microphone that I would plug into the jack and save it to a file.

3

No. The Pi's 3.5mm jack is output only. If you want to record audio you'll need to use a USB or GPIO based soundcard.

  • There is a non-comprehensive list of GPIO sound cards here – Matt Oct 10 '16 at 11:11

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