Audio test tones are a special class of artificially-created sounds. An example is the sine-wave tone you sometimes hear at the end of a video, or when a television station goes off the air.
There are two things test tones are usually used for:
1. Testing the quality of an audio signal.
2. Testing the quality of audio hardware systems and identifying faults.
MAONO is an innovative designer and manufacturer of Lavalier, Podcasting, Wireless, Shotgun, Recording microphones and accessories for Smartphone, Camera and PC, etc.