MICRO LEVEL SOUND DESIGN

TIME - FREQUENCY MODELS


Traditional View of the Time and Frequency Domains as Independent

Fourier Transform / Inverse Transform Connects Each Domain

 

At the Micro-Sound Level, Time and Frequency are Interdependent and Linked by an Uncertainty Principle

Analogy to Heisenberg Uncertainty Principle

Position <----> Speed (rate of change of position)

Time <-----> Frequency (rate of change of phase)

 

The extremes of the Time and Frequency Domains

Discrete Frequency -----> Infinite Time

Discrete Time (impulse) -------> Infinite Bandwidth

Gabor (1946-47) showed that between these extremes, a Gaussian shaped grain has a Gaussian shaped spectrum

Techniques that link the Time and Frequency Domains

with the rule that a change in the time domain results in a change in the frequency domain

audio rate fusion <---> 50 ms/20 Hz threshold <---> discrete events

Granular Synthesis

Granulation of Sampled Sound

FOF Synthesis (formant waveform)

FOG synthesis (formant grains)

VOSIM (voice simulation)

Curtis Roads' techniques (pulsar, glisson, wavelet, trainlet synthesis, etc)

Convolution

All are examples of complex systems with emergent form