ABSTRACT
A type of horn used on gramophones and phonographs, introduced in 1905 by Charles Eichhorn. The name derives from the shape of the horn, but many of those horns also had flower paintings on them.
A wavering of pitch produced by analog playback equipment. The immediate cause may be fluctuation in turntable speed or tape-transport speed in a tape deck. It may also result from up-and-down movement of the turntable or disc surface. The latter is often called warp wow. Flutter is most evident on notes of long duration, especially at upper frequencies, so it is particularly annoying in piano recordings or bell tones. The National Association of Broadcasters (NAB) has a standard for cassette decks, requiring that flutter shall not exceed 0.2 percent. For open-reel recorders the NAB standard varies, with tape speed, from .05 percent to 0.10 percent. Modern digital recording and playback systems should have no audible flutter at all.
