MEASUREMENT OF AUDIO LEVEL
In the recording process, audio level is a critical factor. If is too high, audio distortion occurs. If it is too low, the signal-to-noise ratio deteriorates. Thus precise measurement of audio level is essential during recording. A mechanical VU-meter or an electronic LED bar graph meter measures audio level. One of the most effective and fastest methods employs LEDs which change color according to signal level. When the audio level is too high or too low the lamp changes from green to red signaling that a problem has arisen.
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