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what is the spektral?????
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Gabriel_green trek
IsraTrance Junior Member
Started Topics :
19
Posts :
10
Posted : Jun 28, 2003 11:21
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Some exist plugins that it has spektral in the name: spektral delay, spektral gate, spektralizer.. In the term technician, spektra.... must have un meant. I would like to know which that is this meaning |
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parasyke
Started Topics :
2
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32
Posted : Jul 3, 2003 12:04
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This is a very complicated topic but, very basically, sound encompasses a range of frequencies from approximately 20Hz to approximately 20kHz: i.e. what the human ear can hear. As this range is continuous it can be described as a spectrum. On a simple level, the division of sound into bass, midrange and treble is dividing it into a 3 part spectrum. Thus what these plugins all do is to divide the sound into parts and then process those parts individually. How they do this is the complex part.
Other than sinewaves, any sound is made up of a number of component frequencies. Sounds can be composed of harmonic frequencies (i.e. there are specific relationships between the various components making up the sound) or enharmonic (i.e. there are no specific relationships between the components).
You can do analysis of harmonic sounds via linear spectra: this divides the sound into its fundamental frequency and its partials. Each one is represented as a single sinewave at that frequency. A line spectrum is a spectral representation that displays the frequencies and relative intensities of the component sine waves. Each sine wave is displayed as a single vertical line placed at the appropriate frequency on the x-axis. The height of the line represents the amplitude of the component sine wave. The amplitude is usually displayed a deciBel value. Phase information is absent in such a display. Given that phase is a perceptually insignificant (inaudible) component of a complex sound, such a display shows the perceptually significant components of the complex sound.
Or you can use Fourier transforms to try to unpack the components of a sound. This works in fundamentally the same way except the lines do not necessarily conform to integer multiples of a fundamental frequency.
Most of the these spectral plugins use Fourier Transforms to split an incoming signal into a number of bands (generally > 1024) and then apply delays, modulation and/or filtering to the individual bands to warp the signal beyond recognition.
Well, at least I think they do  |
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Gabriel_green trek
IsraTrance Junior Member
Started Topics :
19
Posts :
10
Posted : Jul 5, 2003 22:28
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tank for the explanations
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