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MySQL (beta) at CHEARSdotinfo.co.uk Sound synthesis Sampling & additive synthesis -> Musique Concrète and Sampling: Background -> Looping -> Pitch Shifting -> Sample-rate Conversion Without Pitch Shifting -> Sample Libraries Subtractive Synthesis -> Introduction to Filters -> Filter Types and Response Curves -> Filter Q and Gain -> Filter Banks and Equalizers -> Comb and Allpass Filters Modulation Synthesis --- Ring Modulation --- Amplitude Modulation --- Frequency Modulation
MySQL (beta) at CHEARSdotinfo.co.uk Frequency and Amplitude If the pressure varies according to a repeating pattern we say the sound has a periodic waveform. If there is no discernible pattern it is called noise. In between these two extremes is a vast domain of quasi-periodic and quasi-noisy sounds. One repetition of a periodic waveform is called a cycle, and the fundamental frequency of the waveform is the number of cycles that occur per second.we substitute Hz for "cycles per second" in accordance with standard acoustical terminology. (Hz is an abbreviation for Hertz, named after the German acoustician Heinrich Hertz.) Time-domain Representation A simple method of depicting sound waveforms is to draw them in the form of a graph of air pressure versus time (figure 1.8). Frequency-domain Representation A frequency-domain or spectrum representation shows the frequency content of a sound. The individual frequency components of the spectrum can be referred to as harmonics or partials. Harmonic frequencies are simple integer multiples of the fundamental frequency. More generally, any frequency component can be called a partial, whether or not it is an integer multiple of a fundamental.
