Press PLAY to start the test tone.
To run the test at your device: Start UDCast and select Test. When UDCast detects the test tone, it will display message “Running OK,” or output the message through your earphones. (If using vocal assistance, be sure to connect your earphones.)
*The test tone is not audible to human ears.
*Be sure that your device’s microphone is unobstructed. (The tone is received through the microphone.)