Fedora 17 Microphone not Working

If you can't use your headphones microphone on your newly installed Fedora 17 device, you first need to:

1. Open your sound settings and check the proper  device is enabled.
2. If yes, run alsamixer, select the sound card and make sure that the internal microphone and capture are enabled and that both Mic Boost and Capture have high volumes.
3. Run arecord -D "hw:1,0,0" -f cd -d 4 test-mic.wav. The wav file created should have sound in it.

More details on this thread.