Audio Antics - Raspberry Pi for Secret Agents - page 25

If your gadget doesn't show up in the cards list, it could be that no drivers were
found and loaded for your device, and your best bet is to search the Raspberry Pi
forums for hints on your gadget at http://www.raspberrypi.org/forums/ .
Next, we'll have a look at the new device in alsamixer using the following command:
pi@raspberrypi ~ $ alsamixer -c1
The -c1 argument tells alsamixer to show the controls for card number one,
but you can easily switch between cards using the F6 or S keys.
Now, let's have a closer look at the other views available:
• F1 or H : This displays a help page with a comprehensive list of all the
keyboard shortcuts
• F2 or / : This displays a dialog that allows you to view the information files in
/proc/asound
• F3 or Tab : This displays the Playback meters and controls view
• F4 or Tab : This displays the Capture (recording) meters and controls view
• F5 or Tab : This displays a combined Playback and Capture view
Since we're about to record some sound, we'll want to focus on the Capture view.
It's fairly common for the microphone of your audio gadget to be inactive and
unable to record by default until you enable it to capture! Find your Capture control,
usually labeled Mic , and toggle it on using the space bar so that it displays the word
CAPTURE and adjust the recording volume using the arrow keys.
AlsaMixer showing a toggled on capture device