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Below is a comparison between the first 31 harmonics and the intervals of 12-tone equal temperament (12TET), octave displaced and compressed into the span of one octave. Tinted fields highlight differences greater than 5 cents ( 1 ⁄ 20 of a semitone), which is the human ear's " just noticeable difference " for notes played one after the other ...
The base-10 logarithm of 2 is equal to approximately 0.301, which Sauveur multiplies by 1000 to obtain 301 units in the octave. In order to work on more manageable units, he suggests to take 7/301 to obtain units of 1/43 octave. [b] The octave therefore is divided in 43 parts, named "merides", themselves divided in 7 parts, the "heptamerides ...
Chimes stop / Piano stop (Gulbransen [27]) Vocal chorus (Farfisa Pergamon in 1981) Electronic rhythm (Wurlitzer Sideman in 1959, Seeburg & Gulbransen in 1964 [27]) One-touch chords (Hammond S-6 Chord Organ in 1950) Automatic Orchestra Control (Lowrey organ in 1963) [28] — turns a single note (on upper manual) into a full chord (designated on ...
In electronics, an octave (symbol: oct) is a logarithmic unit for ratios between frequencies, with one octave corresponding to a doubling of frequency. For example, the frequency one octave above 40 Hz is 80 Hz. The term is derived from the Western musical scale where an octave is a doubling in frequency.
Until 1975, Hammond organs generated sound by creating an electric current from rotating a metal tonewheel near an electromagnetic pickup, and then strengthening the signal with an amplifier to drive a speaker cabinet. The organ is commonly used with the Leslie speaker. Around two million Hammond organs have been manufactured.
Leslie S-5T train horn being fitted to a restored ex-Seaboard System EMD GP30 diesel locomotive at the 2006 Oak Ridge Horn Honk and Collectors Meet Train horns are made of multiple horn units called chimes which produce different notes; sounded together they make a chord. The Nathan model M5 pictured is a 5 chime horn.
12-tone equal temperament chromatic scale on C, one full octave ascending, notated only with sharps. Play ascending and descending ⓘ. 12 equal temperament (12-ET) [a] is the musical system that divides the octave into 12 parts, all of which are equally tempered (equally spaced) on a logarithmic scale, with a ratio equal to the 12th root of 2 (≈ 1.05946).
12 tone equal temperament chromatic scale on C, one full octave ascending, notated only with sharps. Play ascending and descending ⓘ. An equal temperament is a musical temperament or tuning system that approximates just intervals by dividing an octave (or other interval) into steps such that the ratio of the frequencies of any adjacent pair of notes is the same.
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