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Undertone Series
In music, the undertone series or subharmonic series is a sequence of notes that results from inverting the intervals of the overtone series. While overtones naturally occur with the physical production of music on instruments, undertones must be produced in unusual ways. While the overtone series is based upon arithmetic multiplication of frequencies, resulting in a harmonic series, the undertone series is based on arithmetic division. Nattiez shows the undertone series on E, as Riemann (''Handbuch der Harmonielehre'', 10th ed., 1929, p. 4) and D'Indy (''Cours de composition musicale'', vol. I, 1912, p. 100) had done. Terminology The hybrid term ''subharmonic'' is used in music in a few different ways. In its pure sense, the term ''subharmonic'' refers strictly to any member of the subharmonic series (, , , , etc.). When the subharmonic series is used to refer to frequency relationships, it is written with f representing some highest known reference frequency (, , , , etc. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Undertone Series On C
Undertone or Undertones may refer to: Music * Undertone series, a sequence of notes that results from inverting the intervals of the overtone series * The Undertones, Northern Irish band ** ''The Undertones'' (album), 1979 album by The Undertones * Northwestern Undertones, a cappella group at Northwestern University, Evanston, Illinois, United States Other uses * Operation Undertone, part of the Allied invasion of Germany in World War II * Undertone (advertising company), a New York-based digital advertising company * An underlying or implied tendency or meaning; a subtext Subtext is any content of a creative work, which is not announced explicitly (by characters or author), but is implicit, or becomes something understood by the audience. Subtext has been used historically to imply controversial subjects without ... * Skin undertone, as it applies to cosmetics; see color analysis (art) * Colour of a paint spread very thinly over a white surface See also * Overtones (disa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daniel James Wolf
Daniel James Wolf (born September 13, 1961 in Upland, California) is an American composer. Studies Wolf studied composition with Gordon Mumma, Alvin Lucier, and La Monte Young, as well as musical tunings with Erv Wilson and Douglas Leedy and ethnomusicology (M.A., Ph.D. 1990 Wesleyan University). Important contacts with Lou Harrison, John Cage, Walter Zimmermann. Managing Editor of the journal '' Xenharmonikon'', 1985-89. Based in Europe from 1989, he is known as a member of the "Material" group of composers, along with Hauke Harder, Markus Trunk and others. Compositions Wolf's compositions apply an experimental approach to musical materials, with a special interest in intonation, yet often display a surface that playfully - if accidentally - recalls historical music. Major works include ''The White Canoe'', an opera seria for hand puppets to the libretto by Edward Gorey, six string quartets, ''Figure & Ground'' for string trio, ''Field Study'' for vn, tb, ban, gui, ''Dec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
555 Timer IC
The 555 timer IC is an integrated circuit (chip) used in a variety of timer, delay, pulse generation, and oscillator applications. Derivatives provide two ( 556) or four ( 558) timing circuits in one package. The design was first marketed in 1972 by Signetics. Since then, numerous companies have made the original bipolar timers, as well as similar low-power CMOS timers. In 2017, it was said that over a billion 555 timers are produced annually by some estimates, and that the design was "probably the most popular integrated circuit ever made". History The timer IC was designed in 1971 by Hans Camenzind under contract to Signetics. In 1968, he was hired by Signetics to develop a phase-locked loop (PLL) IC. He designed an oscillator for PLLs such that the frequency did not depend on the power supply voltage or temperature. Signetics subsequently laid off half of its employees due to the 1970 recession, and development on the PLL was thus frozen. Camenzind proposed the dev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurorack
Eurorack is a modular synthesizer format originally specified in 1995 by Doepfer Musikelektronik. It has since grown in popularity, and as of 2022 has become a dominant hardware modular synthesizer format, with over 15,000 modules available from more than 1000 different manufacturers ranging from DIY kits and boutique, cottage-industry designers to well-known, established synth mass-manufacturers like Moog and Roland. Compact size, 3.5mm mono jacks and cables for patching all signals, and lack of a visual or sonic aesthetic defined by one manufacturer sets Eurorack apart from other modular synthesizer formats, and these factors have contributed to the popularity of Eurorack among both manufacturers and musicians. History Before Eurorack, in the late 1970s, several modular systems based on the industrial “Euro” card frames appeared: * Elektor Formant (3U or 6U x 7HP, 3.5 mm jacks, 31 pin bus, +/-15V) * BME PM10/Axiom (3U x 8HP, RCA/Phono jacks, 31 pin bus, +/-15V) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serge Synthesizer
The Serge synthesizer ( Serge Modular or Serge Modular Music System) is an analogue modular synthesizer system originally developed by Serge Tcherepnin, Rich Gold and Randy Cohen at CalArts in late 1972. The first 20 Serge systems (then called "Tcherepnins") were built in 1973 in Tcherepnin's home. Tcherepnin was a professor at CalArts at the time, and desired to create something like the exclusively expensive Buchla modular synthesizers "for the people that would be both inexpensive and powerful." After building prototypes, Tcherepnin went on to develop kits for students to affordably build their own modular synthesizer, production taking place unofficially on a second floor CalArts balcony. This led to Tcherepnin leaving CalArts in order to produce kits commercially, starting in 1974. After leaving CalArts, Serge had a small factory on Western Avenue in Hollywood. He relocated to a three-story Victorian house on Haight Street in 1980. While the synthesizers were inexpensive c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Analog Synthesizers
An analog (or analogue) synthesizer is a synthesizer that uses analog circuits and analog signals to generate sound electronically. The earliest analog synthesizers in the 1920s and 1930s, such as the Trautonium, were built with a variety of vacuum-tube (thermionic valve) and electro-mechanical technologies. After the 1960s, analog synthesizers were built using operational amplifier (op-amp) integrated circuits, and used potentiometers (pots, or variable resistors) to adjust the sound parameters. Analog synthesizers also use low-pass filters and high-pass filters to modify the sound. While 1960s-era analog synthesizers such as the Moog used a number of independent electronic modules connected by patch cables, later analog synthesizers such as the Minimoog integrated them into single units, eliminating patch cords in favour of integrated signal routing systems. History 1900–1920 The earliest mention of a "synthetic harmoniser" using electricity appears to be in 1906, cre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subharmonic Synthesizer
A subharmonic synthesizer is a device or system that generates subharmonics of an input signal. The ''n''th subharmonic of a signal of fundamental frequency ''F'' is a signal with frequency ''F''/''n''. This differs from ordinary harmonics, where the ''n''th harmonic of fundamental frequency ''F'' is a signal of frequency ''nF''. Subharmonic synthesizers can be used in professional audio applications as bass enhancement devices during the playback of recorded music. Other uses for subharmonic synthesizers include the application in bandwidth extension. A subharmonic synthesizer can be used to extend low frequency response due to bandwidth limitations of telephone systems. Subharmonic synthesizers are used extensively in dance clubs in certain genres of music such as disco and house music. They are often implemented to enhance the lower frequencies, in an attempt to gain a "heavier" or more vibrant sound. Various harmonics can be amplified or modulated, although it is most common to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octave Effect
Octave effect boxes are a type of special effects unit which mix the input signal with a synthesised signal whose musical tone is an octave lower or higher than the original. The synthesised octave signal is derived from the original input signal by halving (octave-down) or doubling (octave-up) the frequency. This is possible due to the simple two-to-one relationship between the frequencies of musical notes which are separated by an octave. One of the first popular musicians to employ the octave effect was Jimi Hendrix, who also used a variety of other effects in his recordings and public performances. Hendrix used an octave-fuzz pedal known as the octavia. Analog octave effects differ from harmonizers and pitch shifters which digitally sample the sound and process it to change its pitch. Creation of the octave Octave up Octave-up effects usually use full wave rectification using diodes to "fold up" the negative part of the waveform to make a new waveform an octave hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signal Processing
Signal processing is an electrical engineering subfield that focuses on analyzing, modifying and synthesizing ''signals'', such as audio signal processing, sound, image processing, images, and scientific measurements. Signal processing techniques are used to optimize transmissions, Data storage, digital storage efficiency, correcting distorted signals, subjective video quality and to also detect or pinpoint components of interest in a measured signal. History According to Alan V. Oppenheim and Ronald W. Schafer, the principles of signal processing can be found in the classical numerical analysis techniques of the 17th century. They further state that the digital refinement of these techniques can be found in the digital control systems of the 1940s and 1950s. In 1948, Claude Shannon wrote the influential paper "A Mathematical Theory of Communication" which was published in the Bell System Technical Journal. The paper laid the groundwork for later development of information c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loudspeakers
A loudspeaker (commonly referred to as a speaker or speaker driver) is an Acoustical engineering#Electroacoustics, electroacoustic transducer that converts an electrical audio signal into a corresponding sound. A ''speaker system'', also often simply referred to as a "speaker" or "loudspeaker", comprises one or more such speaker ''drivers'', an enclosure, and electrical connections possibly including a Audio crossover, crossover network. The speaker driver can be viewed as a linear motor attached to a Diaphragm (acoustics), diaphragm which couples that motor's movement to motion of air, that is, sound. An audio signal, typically from a microphone, recording, or radio broadcast, is amplified electronically to a power level capable of driving that motor in order to reproduce the sound corresponding to the original unamplified electronic signal. This is thus the opposite function to the microphone; indeed the ''dynamic speaker'' driver, by far the most common type, is a linear mot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3rd Bridge
The 3rd bridge is an extended playing technique used on the electric guitar and other string instruments that allows a musician to produce distinctive timbres and overtones that are unavailable on a conventional string instrument with two bridges (a nut and a saddle). The timbre created with this technique is close to that of gamelan instruments like the bonang and similar Indonesian types of pitched gongs. Third bridge instruments can be custom-made by experimental luthiers (as with guitars designed and played by Hans Reichel); modified from a non-third bridge instrument (as with conventional guitars modified with a pencil or screwdriver under the strings); or may take advantage of design quirks of factory-built instruments (as with the Fender Jazzmaster, which has strings that continue from the "standard" bridge to the vibrato mechanism). Perhaps the best-known examples of this technique come from No Wave artists like Glenn Branca and Sonic Youth. The 3rd bridge tech ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extended Technique
In music, extended technique is unconventional, unorthodox, or non-traditional methods of singing or of playing musical instruments employed to obtain unusual sounds or timbres.Burtner, Matthew (2005).Making Noise: Extended Techniques after Experimentalism, ''NewMusicBox.org''. Composers’ use of extended techniques is not specific to contemporary music (for instance, Hector Berlioz’s use of ''col legno'' in his '' Symphonie Fantastique'' is an extended technique) and it transcends compositional schools and styles. Extended techniques have also flourished in popular music. Nearly all jazz performers make significant use of extended techniques of one sort or another, particularly in more recent styles like free jazz or avant-garde jazz. Musicians in free improvisation have also made heavy use of extended techniques. Examples of extended techniques include bowing under the bridge of a string instrument or with two different bows, using key clicks on a wind instrument, blowing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
