PURPOSE:
Check that balance control works correctly on external headphone
STEPS:
1. Check that moving the balance slider from left to right works smoothly
2. Click the Test button to play an audio tone for 10 seconds.
3. Move the balance slider from left to right and back.
4. Check that actual headphone audio balance follows your setting.
VERIFICATION:
Does the slider move smoothly, as well as being followed by the setting by the actual audio output?