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Frequency Modulation Synthesis (FM Synthesis) | Abstract

Added on - 04 Feb 2020

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FREQUENCY MODULATIONCCS
AbstractFrequency Modulation synthesis (FM synthesis) is a process of synthesizing an audio or music,in which the tone of waveform get changed by modulating its frequency in accordance to themodulator frequency which is in the broad audio range and give rise to more complex waves.
1.0 Introduction.1Frequency Modulation can be stated as method of alteration or modulation of carrierwave containing information in the form of electrical signals by modulating its instantaneousfrequency. This process of encoding the information can be used with both types of data, that areanalog as well as digital. However, in amplitude modulation, amplitude of waves varied wherebyfrequency of carrier waves remains constant.2A visionary, named John Chowning who has worked in the field of electronic industryand set up many research centers of music in different regions of world stated that, Mathematicsand Music both are considered as expressive languages which have different patterns. Accordingto Chowning, musicians are highly integrated with their work, that is in compilation of music,after-then hearing it3. While composing music, every musician has to deal with symbols, whichis why artistic use of technology is made by music first, then others arts came into existence inthe technological forms. Moreover, there is great connection between human hearing power andnature of sound. According to mathematical investigation it has been perceived that mathematicsand science has given a effective way of comprehension, creation and manipulation of sound.The spectrum generated by FM synthesis with one modulator is given as follows:For modulation signal, the carrier signal is1Communication Systems" 4th Ed (Simon Haykin, 2001) p. 812David B. Rutledge, The Electronics of Radio, 1st edn (Cambridge University Press., 1999), p. 310. ISBN 978-0-521-64645-1.3H. P. Westman, ed., Reference Data for Radio Engineers (Fifth ed.). (Howard W. Sams & Co., 1970) p. 21-11.
FM and additive synthesisIn the scenario of modern technological world, most of people are not aware and well-versed ofvarious forms of synthesis. With the ease of use of computer-based synthesis, any synthesizedprogram can be opened and fiddled around ears and feel the sense. In the modern world, it isnecessary to to be educated enough so that it becomes easier to break the mold. There aredifferent synthesis methods, which can be used in an effective way.Subtractive SynthesisSubtractive method is most common process which introduces the aspect of sound-synthesis. It ismade of simple chain of oscillator, which then run through a filter and then forwarded to anamplifier to gain the ASDR control and staging. Subtractive method can be effectively used foranalog as well as digital data and for other purpose also, like in instruments and sound effects.Subtractive synthesizer is that method, through which any harmonic character can bemade by combination of oscillators or by an single oscillator.Additive Synthesis (and Re-synthesis)In additive synthesis, different frequencies and multiple sine waves are combined to build aharmonic structure. Moreover, the additive synthesis is directly connected with the process of re-synthesis. In addition to this, it also analyses the harmonic structure and then recreate it.Additive synthesis is just like re- synthesis, excluding the fact that the process of re-synthesis isre-created from existing sound and nor from a general tone.
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