QA/TestPlans/XO Audio

Built-in Microphone and Speakers

 * Record a sound through the Built-in Microphone
 * Play it back on the Built-in Speakers

Microphone and Headphone Jacks

 * Record a sound through a microphone plugged into the jack
 * Play it back on headphones plugged into the jack

Longevity
There have been reports of PulseAudio ceasing to work after a little longer than an hour
 * Play more than an hour of sound through PulseAudio

Sampling a Car Battery
For real
 * You should be able to plug a car battery into the laptop and test the voltage: [Uses of making measurement using the analog input port on the laptop]