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Measurement of wow and flutter is carried out on audio tape machines, cassette recorders and players, and other analog recording and reproduction devices with rotary components (e.g. movie projectors, turntables (vinyl recording), etc.) This measurement quantifies the amount of 'frequency wobble' (caused by speed fluctuations) present in ...
The terms "wow and flutter" are often referred to together, flutter being a higher-rate version of wow. Scrape flutter—a high-frequency flutter of above 1000 Hz—can sometimes occur from the tape vibrating as it passes over a head, as a result of rapidly interacting stretch in the tape and stiction at the head. It adds a roughness to the ...
"Wow" is slow speed (a few Hz) variation, caused by longer-term drift of the drive motor speed, whereas "flutter" is faster speed (a few tens of Hz) variations, usually caused by mechanical defects such as out-of-roundness of the capstan of a tape transport mechanism. The measurement is given in % and a lower number is better.
Wow is a form of flutter that occurs at a slower rate. Wow and flutter are most noticeable on signals which contain pure tones. For LP records, the quality of the turntable will have a large effect on the level of wow and flutter. A good turntable will have wow and flutter values of less than 0.05%, which is the speed variation from the mean ...
All of the Hanpin-made turntables seem to have an inordinately high wow and flutter spec, even their own top-of-the-line models, the DJ-5500 and DJ-3560. The only exception to this for Hanpin-made turntables seems to be the ReLoop RP-7000 and RP-8000 which claim a wow and flutter spec of 0.01% wrms.
The SL-1200 series was developed as a special project by Technics parent company Matsushita in an attempt to solve problems related to turntable design. The task included minimizing acoustic feedback, unwanted resonances, wow and flutter and speed errors.
Linn presented an important challenge to that by claiming that the source (i.e. the turntable) was the most important part of the system. [1] Ivor Tiefenbrun has talked about how Sondek derives from the term “sound deck” to emphasise the revolutionary concept that the turntable, the “deck”, is responsible for the sound quality. [9]
The design and quality of the recorder are also important factors. The machine's speed stability (wow-and-flutter), head gap size, head quality, and general head design and technology. and the machine's mechanical alignment [b] affect the quality of the recording. The regulation of tape tension affects contact between the tape and the heads and ...