Requires tuneR package.
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amazing_grace.r: Creates the first 10 notes of Amazing Grace in the key of C with the correct ryhthm. A bagpipe feel is simulated by adding a low "drone" and grace notes.
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amplitude_vibrato.r: Creates a sine tone with "amplitude vibrato".
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compress.r: Creates a compressed version of the audio by sythesizing only using the STFT coefficients with the highest moduli.
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echo.r: Produces an echo using an AR filter.
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filter.r: A filter that that passes only frequencies between 1000 and 3000 Hz.
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karplus-strong.r: An implementation of the Kaplus-Strong string synthesis algorithm.
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pitch_vibrato.r: Creates a sine tone with pitch vibrato.
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robotize.r: "Robotizes" the input audio file.
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whisperize.r: "Whisperizes" the input audio file.