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A four channel quadraphonic diagram showing the usual placement of speakers around the listener. Quadraphonic (or quadrophonic, also called quadrasonic or by the neologism quadio [1] [formed by analogy with "stereo"]) sound – equivalent to what is now called 4.0 surround sound – uses four audio channels in which speakers are positioned at the four corners of a listening space.
Comparison between tunings: Pythagorean, equal-tempered, quarter-comma meantone, and others.For each, the common origin is arbitrarily chosen as C. The degrees are arranged in the order or the cycle of fifths; as in each of these tunings except just intonation all fifths are of the same size, the tunings appear as straight lines, the slope indicating the relative tempering with respect to ...
Fender Silverface amplifiers were built between 1967 and 1981. [5] They are often referred to as Silverface or Chromeface because of their brushed aluminum face plate. The first Silverface amps, manufactured between 1967 and 1969, had an aluminum frame trim, known as a "drip edge" around the grillcloth. a "tailed" amp logo and the AB763 ...
Multitrack Studio, from Bremmers Audio Design (The Netherlands), [80] uses special filters to achieve a pseudo-stereo effect: the shelve filter directs low frequencies to the left channel and high frequencies to the right channel, and the comb filter adds a small delay in signal timing between the two channels, a delay barely noticeable by ear ...
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The Weather Channel 2 days ago Fewer Freezing Nights: A Warming Trend Affecting Everything From Agriculture To Health A new study shows a decline in the number of freezing nights across the country.
A prototype for five-channel surround sound, then dubbed "quintaphonic sound", was used in the 1975 film Tommy. [6]5.1 dates back to 1976, [7] when Dolby Labs modified the track usage of the six analogue magnetic soundtracks on Todd-AO 70 mm film prints.
Quarter tone on C. A quarter tone is a pitch halfway between the usual notes of a chromatic scale or an interval about half as wide (orally, or logarithmically) as a semitone, which itself is half a whole tone. Quarter tones divide the octave by 50 cents each, and have 24 different pitches.