Asus M4A89GTD PRO Supplementary Manual page 18

Note: Before you start recording, ensure that your computer's microphone is turned
on.
Recording Test Screen (Click the items to get more information.)

Multimedia Playback Test
After you start the test, click Open button to select a music file, and then click Play
button to play the music. Based on the playback quality, click Passed/Failed to send
the result to the sub tester.
Recording Test Screen (Click the items to get more information.)