Wow and flutter
Appearance
Wow and flutter is a distortion in the recording and replay of a rotating geluidsdrager, such as a grammophone record, magnet link or compactcassette, which is caused variaties in the turn speed. This hot modulatiemodulatie modulatie of the sound. At wow it concerns slow variaties (approximately 0,1-10 Hz), at flutter for fast (more than approximately 10 Hz). The degree of wow and flutter is usually specified as a common number, expressed in percents. How lower, how better.