c = cost(src)
returns a structure, c, whose fields contain information about
the computational cost of implementing a multistage sample rate converter,
src.
Create src, a multistage sample rate converter with default values. src combines three filter stages to convert from 192 kHz to 44.1 kHz. Determine its computational cost: the number of coefficients, the number of states, the number of multiplications per unit sample, and the number of additions per unit sample.
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