Configure and test audio on the Pi

• Please follow prior steps to install Raspbian.
• Connect the USB microphone and 3.5mm jack speaker
• Go to the UI and 
• Click on the Raspberry icon > Preferences> Audio Device settings 
• Select "USB PnP Sound Device (Alsa Mixer)
• Click "Select Controls", select Microphone and make the Microphone audio to its highest.

• Run "sudo raspi-config" on the terminal
• Select "Advanced Options"
• Select "Audio"
• Select "Force 3.5mm headphone jack"
• Select "Finish"

Setting Mic and Audio controls:

• Run the command "aplay -l" (its -L lowercase) in the terminal
• Copy the card # and device # (for speaker)
• Run the command "arecord -l" (its -L lowercase) in the terminal
• Copy the card # and device # (for Mic)
• Open a new file under /home/pi
• vi .asoundrc
• Copy paste the below

pcm.!default {

  type asym

  capture.pcm "mic"

  playback.pcm "speaker"

}

pcm.mic {

  type plug

  slave {

    pcm "hw:1,0"

  }

}

pcm.speaker {

  type plug

  slave {

    pcm "hw:0,0"

  }

}

In the above

pcm "hw:1,0" under pcm.mic is hw:<card#>,<device#>

Please use the correct one from aplay (Speaker) and arecord (Mic) as mentioned above.

Test Audio:

• ssh to the Pi (or run the commands directly on a terminal on the pi)
• Run the command "speaker-test -t wav"
• You should hear voice from the speaker
• Our speaker is configured.

Test Mic:

• ssh to the Pi (or run the commands directly on a terminal on the pi)
• Run the command
  arecord --format=S16_LE --duration=10 --rate=16000 --file-type=raw out2.wav
• Say something near the microphone for 10 sec [Note duration above is in seconds]
• To replay, run the command
• aplay --format=S16_LE --rate=16000 out2.wav

Your Mic and speaker are now configured.