A Simple Ring-Modulator
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Gardner • Even Orpheus Needs a Synthi Edit No Proof
James Gardner Even Orpheus Needs a Synthi Since his return to active service a few years ago1, Peter Zinovieff has appeared quite frequently in interviews in the mainstream press and online outlets2 talking not only about his recent sonic art projects but also about the work he did in the 1960s and 70s at his own pioneering computer electronic music studio in Putney. And no such interview would be complete without referring to EMS, the synthesiser company he co-founded in 1969, or namechecking the many rock celebrities who used its products, such as the VCS3 and Synthi AKS synthesisers. Before this Indian summer (he is now 82) there had been a gap of some 30 years in his compositional activity since the demise of his studio. I say ‘compositional’ activity, but in the 60s and 70s he saw himself as more animateur than composer and it is perhaps in that capacity that his unique contribution to British electronic music during those two decades is best understood. In this article I will discuss just some of the work that was done at Zinovieff’s studio during its relatively brief existence and consider two recent contributions to the documentation and contextualization of that work: Tom Hall’s chapter3 on Harrison Birtwistle’s electronic music collaborations with Zinovieff; and the double CD Electronic Calendar: The EMS Tapes,4 which presents a substantial sampling of the studio’s output between 1966 and 1979. Electronic Calendar, a handsome package to be sure, consists of two CDs and a lavishly-illustrated booklet with lengthy texts. -
Switched-Mode Power Supply - Wikipedia, the Free Encyclopedia
Switched-mode power supply - Wikipedia, the free encyclopedia Log in / create account Article Discussion Read Edit Switched-mode power supply From Wikipedia, the free encyclopedia For other uses, see Switch (disambiguation). Navigation A switched-mode power supply (switching-mode Main page power supply, SMPS, or simply switcher) is an Contents electronic power supply that incorporates a switching Featured content regulator in order to be highly efficient in the Current events conversion of electrical power. Like other types of Random article power supplies, an SMPS transfers power from a Donate to Wikipedia source like the electrical power grid to a load (e.g., a personal computer) while converting voltage and Interaction current characteristics. An SMPS is usually employed to efficiently provide a regulated output voltage, Help typically at a level different from the input voltage. About Wikipedia Unlike a linear power supply, the pass transistor of a Community portal switching mode supply switches very quickly (typically Recent changes between 50 kHz and 1 MHz) between full-on and full- Interior view of an ATX SMPS: below Contact Wikipedia off states, which minimizes wasted energy. Voltage A: input EMI filtering; A: bridge rectifier; regulation is provided by varying the ratio of on to off B: input filter capacitors; Toolbox time. In contrast, a linear power supply must dissipate Between B and C: primary side heat sink; the excess voltage to regulate the output. This higher C: transformer; What links here Between C and D: secondary side heat sink; efficiency is the chief advantage of a switched-mode Related changes D: output filter coil; power supply. -
Teaching Electronic Music – Journeys Through a Changing Landscape
Revista Vórtex | Vortex Music Journal | ISSN 2317–9937 | http://vortex.unespar.edu.br/ D.O.I.: https://doi.org/10.33871/23179937.2020.8.1.12 Teaching electronic music – journeys through a changing landscape Simon Emmerson De Montfort University | United Kingdom Abstract: In this essay, electronic music composer Simon Emmerson examines the development of electronic music in the UK through his own experience as composer and teacher. Based on his lifetime experiences, Emmerson talks about the changing landscape of teaching electronic music composition: ‘learning by doing’ as a fundamental approach for a composer to find their own expressive voice; the importance of past technologies, such as analogue equipment and synthesizers; the current tendencies of what he calls the ‘age of the home studio’; the awareness of sonic perception, as opposed to the danger of visual distraction; questions of terminology in electronic music and the shift to the digital domain in studios; among other things. [note by editor]. Keywords: electronic music in UK, contemporary music, teaching composition today. Received on: 29/02/2020. Approved on: 05/03/2020. Available online on: 09/03/2020. Editor: Felipe de Almeida Ribeiro. EMMERSON, Simon. Teaching electronic music – journeys throuGh a chanGinG landscape. Revista Vórtex, Curitiba, v.8, n.1, p. 1-8, 2020. arly learning. The remark of Arnold Schoenberg (in the 1911 Preface to his Theory of Harmony) – “This book I have learned from my pupils” – is true for me, too. Teaching is E learning – without my students I would not keep up nearly so well with important changes in approaches to music making, and it would be more difficult to develop new ideas and skills. -
Corel DESIGNER
Mains Harmonics REO (UK) LTD, Units 2 - 4 Callow Hill Road, Craven Arms Business Park, Craven Arms, Shropshire SY7 8NT UK Tel: 01588 673411 Fax: 01588 672718 REO UK LTD Email: sales@ reo.co.uk W ebsite: www.reo.co.uk Contents W hat are mains harmonics? 1 2 Mains harmonics are voltages and/or Harmonics with numbers that are divisible W hat are mains harmonics? currents that occur in an AC mains by three (3rd, 6th, 9th, 12th, 15th, etc.) are 2 electricity power supply at multiples of the called zero sequence harmonics, because nominal mains frequency. 'Even-order' the fields they cause in a three-phase AC harmonic frequencies are those that occur motor are stationary 2 they do not rotate. How do mains harmonics occur? 3 at even-numbered multiples of the Odd-numbered 'zero-sequence' harmonics nominal mains frequency, whereas 'odd- (3rd, 9th, 15th, etc.) are called triplens. order' harmonics occur at odd-numbered W hy are harmonics an increasingly important issue? 7 multiples, as shown in Table 1. Table 1 Some examples of harmonics for four common AC power supply frequencies How mains harmonics cause harm 9 Harmonic Number Even Odd 16.667Hz 50Hz 60Hz 400Hz Order Order Relevant standards and codes on mains harmonics 28 1 (the fundamental 16.667Hz 50Hz 60Hz 400Hz mains frequency) Likely sources of harmonic interference 33 2 33.333 100 120 800 3 50 150 180 1.2kHz The influence of the mains distribution systems impedance 35 4 66.667 200 240 1.6kHz 5 83.333 250 300 2kHz 6 100 300 360 2.4kHz How can harmonics be detected and measured 37 7 116.667 350 420 2.8kHz 8 133.333 400 480 3.2kHz Testing for immunity to harmonically distorted mains supplies 42 9 150 450 540 3.6kHz 10 166.667 500 600 4kHz Prevention and avoidance measures 42 11 183.333 550 660 4.4kHz 12 200 600 720 4.8kHz 13 216.667 650 780 5.2kHz Harmonic mitigation products from REO 61 14 233.333 700 840 5.6kHz 15 250 750 900 6kHz References and further reading 63 ...etc.. -
This Electronic Thesis Or Dissertation Has Been Downloaded from Explore Bristol Research
This electronic thesis or dissertation has been downloaded from Explore Bristol Research, http://research-information.bristol.ac.uk Author: Vagopoulou, Evaggelia Title: Cultural tradition and contemporary thought in Iannis Xenakis's vocal works General rights Access to the thesis is subject to the Creative Commons Attribution - NonCommercial-No Derivatives 4.0 International Public License. A copy of this may be found at https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode This license sets out your rights and the restrictions that apply to your access to the thesis so it is important you read this before proceeding. Take down policy Some pages of this thesis may have been removed for copyright restrictions prior to having it been deposited in Explore Bristol Research. However, if you have discovered material within the thesis that you consider to be unlawful e.g. breaches of copyright (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please contact [email protected] and include the following information in your message: •Your contact details •Bibliographic details for the item, including a URL •An outline nature of the complaint Your claim will be investigated and, where appropriate, the item in question will be removed from public view as soon as possible. Cultural Tradition and Contemporary Thought in lannis Xenakis's Vocal Works Volume I: Thesis Text Evaggelia Vagopoulou A dissertation submitted to the University of Bristol in accordancewith the degree requirements of the of Doctor of Philosophy in the Faculty of Arts, Music Department. -
Additive Synthesis, Amplitude Modulation and Frequency Modulation
Additive Synthesis, Amplitude Modulation and Frequency Modulation Prof Eduardo R Miranda Varèse-Gastprofessor [email protected] Electronic Music Studio TU Berlin Institute of Communications Research http://www.kgw.tu-berlin.de/ Topics: Additive Synthesis Amplitude Modulation (and Ring Modulation) Frequency Modulation Additive Synthesis • The technique assumes that any periodic waveform can be modelled as a sum sinusoids at various amplitude envelopes and time-varying frequencies. • Works by summing up individually generated sinusoids in order to form a specific sound. Additive Synthesis eg21 Additive Synthesis eg24 • A very powerful and flexible technique. • But it is difficult to control manually and is computationally expensive. • Musical timbres: composed of dozens of time-varying partials. • It requires dozens of oscillators, noise generators and envelopes to obtain convincing simulations of acoustic sounds. • The specification and control of the parameter values for these components are difficult and time consuming. • Alternative approach: tools to obtain the synthesis parameters automatically from the analysis of the spectrum of sampled sounds. Amplitude Modulation • Modulation occurs when some aspect of an audio signal (carrier) varies according to the behaviour of another signal (modulator). • AM = when a modulator drives the amplitude of a carrier. • Simple AM: uses only 2 sinewave oscillators. eg23 • Complex AM: may involve more than 2 signals; or signals other than sinewaves may be employed as carriers and/or modulators. • Two types of AM: a) Classic AM b) Ring Modulation Classic AM • The output from the modulator is added to an offset amplitude value. • If there is no modulation, then the amplitude of the carrier will be equal to the offset. -
Pulse Width Modulation ๏ Amplitude Modulation ๏ Ring Modulation ๏ Linear Frequency Modulation ๏ Frequency Modulation (Non-Linear)
fpa 147 Week 6 Synthesis Basics In the early 1960s, inventors & entrepreneurs (Robert Moog, Don Buchla, Harold Bode, etc.) began assembling various modules into a single chassis, coupled with a user interface such as a organ-style keyboard or arbitrary touch switches (Buchla). The various modules were connected by patch cords, hence an arrangement resulting in a certain sound quality or timbre was called a “patch”. The principle was subtractive synthesis: complex waveforms are filtered and altered dynamically to produce the desired result. Sounds could be pitched or non-pitched, imitations of conventional instruments or “new” Voltage Control An important principle of all these devices was the standardization of the control system. A direct current or DC voltage was used to control the parameters or various attributes of the modules. For frequency changes: 1 volt = 1 octave. So a change from 1 volt to 2 volts in the frequency control of an oscillator changes the pitch of the oscillator by 2X or 1 octave. 220 Hz -> 440 Hz. To trigger the modules (initiate an action) a pulse of 5 volts was used. Voltage 2 volts DC Controlled 220 Hz Oscillator Voltage 3 volts DC Controlled 440 Hz Oscillator Envelope no pulse no output Generator Envelope Generator envelope 5 volt pulse Synthesis sources: ๏ Voltage Controlled Oscillators ๏ Noise generators ๏ Audio from microphone or tape ๏ Voltage Controlled Oscillators Sine Triangle Sawtooth Pulse sine wave Sine: Also known as pure tone. Fundamental frequency only. sawtooth wave Contains all the odd harmonics. Fundamental or 1, 3, 5, 7, 9, 11, etc. Much energy in the upper harmonics - bright sounding, often used with low pass filter to create rich timbres. -
Checking out the Power Supply the Power Supply Must Be Carefully Checked out a Good Many Australian-Made Sets from the Mid 1930S-1950 Era
Checking out the power supply The power supply must be carefully checked out a good many Australian-made sets from the mid 1930s-1950 era. Fig.1 before switching on a vintage radio. The shows a typical circuit configura- components most likely to be at fault are the tion but there are other variations. electrolytic capacitors, most of which should be For example, some rectifiers re- quire a cathode voltage of 6.3V AC, replaced as a matter of course. not 5V. Similarly, not all radio valves use Although only a few parts are in- (equivalent to 570 volts, centre- 6.3V heater supplies. There are volved, the power supply is a com- tapped). 2.5V valves, 4V valves and 12V mon source of problems in vintage The 5V and 6.3V AC supplies are valves in some late model sets. In radios. It should be carefully check- wired straight from the trans- these radios, the low tension ed out before power is applied, as a former to the filaments and voltages on the transformer will be fault here can quickly cause heaters. However, the high tension different — but that's about all. damage to critical components. supply must be rectified to give a The high tension voltage will still be Most mains-operated valve high-tension DC supply for the well in excess of 250 volts. radios have three separate secon- anodes and screens for the various The output from the rectifier dary windings on the power receiving and output valves. A valve will not be pure DC but does transformer. -
The Definitive Guide to Evolver by Anu Kirk the Definitive Guide to Evolver
The Definitive Guide To Evolver By Anu Kirk The Definitive Guide to Evolver Table of Contents Introduction................................................................................................................................................................................ 3 Before We Start........................................................................................................................................................................... 5 A Brief Overview ......................................................................................................................................................................... 6 The Basic Patch........................................................................................................................................................................... 7 The Oscillators ............................................................................................................................................................................ 9 Analog Oscillators....................................................................................................................................................................... 9 Frequency ............................................................................................................................................................................ 10 Fine ...................................................................................................................................................................................... -
A More Attractive ‘Way of Getting Things Done’ Freedom, Collaboration and Compositional Paradox in British Improvised and Experimental Music 1965-75
A more attractive ‘way of getting things done’ freedom, collaboration and compositional paradox in British improvised and experimental music 1965-75 Simon H. Fell A thesis submitted to the University of Huddersfield in fulfilment of the requirements for the degree of Doctor of Philosophy The University of Huddersfield September 2017 copyright statement i. The author of this thesis (including any appendices and/or schedules to this thesis) owns any copyright in it (the “Copyright”) and he has given The University of Huddersfield the right to use such Copyright for any administrative, promotional, educational and/or teaching purposes. ii. Copies of this thesis, either in full or in extracts, may be made only in accordance with the regulations of the University Library. Details of these regulations may be obtained from the Librarian. This page must form part of any such copies made. iii. The ownership of any patents, designs, trade marks and any and all other intellectual property rights except for the Copyright (the “Intellectual Property Rights”) and any reproductions of copyright works, for example graphs and tables (“Reproductions”), which may be described in this thesis, may not be owned by the author and may be owned by third parties. Such Intellectual Property Rights and Reproductions cannot and must not be made available for use without the prior written permission of the owner(s) of the relevant Intellectual Property Rights and/or Reproductions. 2 abstract This thesis examines the activity of the British musicians developing a practice of freely improvised music in the mid- to late-1960s, in conjunction with that of a group of British composers and performers contemporaneously exploring experimental possibilities within composed music; it investigates how these practices overlapped and interpenetrated for a period. -
UCLA Electronic Theses and Dissertations
UCLA UCLA Electronic Theses and Dissertations Title Performing Percussion in an Electronic World: An Exploration of Electroacoustic Music with a Focus on Stockhausen's Mikrophonie I and Saariaho's Six Japanese Gardens Permalink https://escholarship.org/uc/item/9b10838z Author Keelaghan, Nikolaus Adrian Publication Date 2016 Peer reviewed|Thesis/dissertation eScholarship.org Powered by the California Digital Library University of California UNIVERSITY OF CALIFORNIA Los Angeles Performing Percussion in an Electronic World: An Exploration of Electroacoustic Music with a Focus on Stockhausen‘s Mikrophonie I and Saariaho‘s Six Japanese Gardens A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Musical Arts by Nikolaus Adrian Keelaghan 2016 © Copyright by Nikolaus Adrian Keelaghan 2016 ABSTRACT OF THE DISSERTATION Performing Percussion in an Electronic World: An Exploration of Electroacoustic Music with a Focus on Stockhausen‘s Mikrophonie I and Saariaho‘s Six Japanese Gardens by Nikolaus Adrian Keelaghan Doctor of Musical Arts University of California, Los Angeles, 2016 Professor Robert Winter, Chair The origins of electroacoustic music are rooted in a long-standing tradition of non-human music making, dating back centuries to the inventions of automaton creators. The technological boom during and following the Second World War provided composers with a new wave of electronic devices that put a wealth of new, truly twentieth-century sounds at their disposal. Percussionists, by virtue of their longstanding relationship to new sounds and their ability to decipher complex parts for a bewildering variety of instruments, have been a favored recipient of what has become known as electroacoustic music. -
Tube Ultragain T1953
Users Manual ENGLISH Version 1.2 December 2002 T1953 TUBE ULTRAGAIN TUBE ULTRAGAIN T1953 SAFETY INSTRUCTIONS CAUTION: To reduce the risk of electric shock, do not remove the cover (or back). No user serviceable parts inside; refer servicing to qualified personnel. WARNING: To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture. This symbol, wherever it appears, This symbol, wherever it appears, alerts alerts you to the presence of you to important operating and mainte- uninsulated dangerous voltage inside nance instructions in the accompanying the enclosurevoltage that may be literature. Read the manual. sufficient to constitute a risk of shock. DETAILED SAFETY INSTRUCTIONS: All the safety and operation instructions should be read before the appliance is operated. Retain Instructions: The safety and operating instructions should be retained for future reference. Heed Warnings: All warnings on the appliance and in the operating instructions should be adhered to. Follow instructions: All operation and user instructions should be followed. Water and Moisture: The appliance should not be used near water (e.g. near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool etc.). Ventilation: The appliance should be situated so that its location or position does not interfere with its proper ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings, or placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings.