TERMIUM Plus®

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speed variations [1 record]

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Alphabetical list of terms

Record 1 2002-11-22

English

Subject field(s)
  • Audio Technology
CONT

No capstan drive system is perfect and ... this will give rise to tape speed variations that affect the playback quality of music. ... Such speed changes are called wow and flutter.

CONT

Flutter is any deviation in frequency in reproduced sound from the original frequency: it usually results from nonuniform motion of the recording medium during recording, duplication or reproduction.

OBS

While the term "flutter" is normally limited to designating higher rates of speed variation, it is often generalized to include both wow and (high speed) flutter, as in TRAUD, 1969, p. 656. In addition, "speed variations" or "flutter" (in the generalized sense) could be used to refer to "drift", which is "a random rate close to zero hertz" (cf. GRAEL, 1977, p. 284).

OBS

flutter: Term standardized by the USA Standards Institute.

Key term(s)
  • wow and flutter

French

Domaine(s)
  • Électroacoustique
DEF

Variations de la vitesse relative entre un support d'enregistrement et la tête d'enregistrement ou de lecture, se traduisant par une modulation de fréquence parasite du signal enregistré.

OBS

Dans le domaine des audiofréquences, les fluctuations lentes (de 0,1 à 10 hertz) sont appelées pleurage, et les fluctuations rapides (au-delà de 10 hertz) sont appelées scintillement.

CONT

[Le] moteur [de la table de lecture TD 126 MKIII] a sa vitesse de rotation commandée électroniquement complétée par un circuit d'asservissement dit APC [...] qui compense automatiquement les variations de vitesses mais aussi les éventuels freinages extérieurs tels que ceux provoqués par un balai dépoussiéreur.

Key term(s)
  • fluctuation de vitesse

Spanish

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