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Location:
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HC 3040 |
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Date:
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Tuesday, Aug.2 |
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Time:
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8:40 AM -8:50 AM
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Author:
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David Keeports, Mills College
510-430-2162, dave@mills.edu
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Co-Author(s):
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None
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Abstract:
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Real-time frequency analyzers (RTFAs) are available as free online downloads, and they are incorporated even in entry-level music production programs such as Apple's GarageBand. Outputting the sound of a drawbar organ though an RTFA clearly shows the analyzer's function. I will present some ways in which this software can be used to display spectral subtleties of sounds that single instantaneous Fourier transforms cannot reveal. When a string is plucked, harmonics initially decay at different rates. Real-time spectral analysis of speech exposes difficulties in representing vowel and consonant sounds as Fourier series. An RTFA provides a useful tool for showing how "resonance box beating" extends to the beating of harmonic waves. Additionally, an RTFA explains why the sound of harmonic waves beating resembles sound processed by a musical phase shifter.
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Footnotes:
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None
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