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Tapes manufactured before 1986 use scotch recording tape inside. Tapes sold by Muzak use a different formulation of tape more similar to type 1 cassette tape. Muzak tapes use 3M shells with Muzak labels over the top of the 3M labeling. The last tapes were sold in 1988. All information on the Cantata 700 was divested by 3M in 1988. [3]
DASH is capable of recording two channels of audio on a quarter-inch tape, and 24 or 48 tracks on 1 ⁄ 2-inch-wide (13 mm) tape [1] [2] [3] on open reels of up to 14 inches. The data is recorded on the tape linearly, [ 4 ] with a stationary recording head , [ 5 ] as opposed to the DAT format, where data is recorded helically with a rotating ...
Tapes affected by sticky-shed are those that were made by Ampex/Quantegy such as 406/407, 456/457, 499, and consumer/audiophile grade back coated tapes such as Grand Master and 20-20+, [citation needed] as well as those made by Scotch/3M including professional tapes such as 206/207, 226/227, 262 (though not all 262 is backcoated and therefore isn't affected), 808, and 986 as well as audiophile ...
Once the tape reaches saturation point, any further increase in recording flux actually decreases output to below SOL. [16] Noise level, usually understood as bias noise (hiss) of a tape recorded with zero input signal, replayed without noise reduction, A-weighted and referred to the same level as MOL and SOL. The difference between bias noise ...
U-Matic S tapes had a maximum recording time of 20 minutes, and large ones 1-hour, although some tape manufacturers such as 3M came out with 30-minute S-tapes and 75-minute large cassettes (and DuPont even managed 90-minute tapes) [13] by using a thinner tape.
The patent described how to cancel sinusoidal tones in ducts by phase-advancing the wave and canceling arbitrary sounds in the region around a loudspeaker by inverting the polarity. [3] In the 1950s Lawrence J. Fogel patented systems to cancel the noise in helicopter and airplane cockpits. In 1957 Willard Meeker developed a working model of ...
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