Chapter 8 Signal Processing Applications8.1 Digital Waveform Generators F Filtering approach Design a filter H(z) whose impulse response h(n) is the waveform to be generated. Input and get the desired waveform at the output. Disadvantage: require a certain amount of computational overhead(额外的计算开销额外的计算开销) Wavetable synthesis (波表合成）波表合成） Precompute the waveform samples, store them in a table in RAM. Access the table in a controlled way. 8.1.2 Periodic Waveform GeneratorsAbout periodic sequence(周期序列）周期序列）: A periodic analog signal does not necessarily remain periodic after sampling. A sinusoid x(t) with frequency f produces periodic x(n) only when some condition about f and the sampling rate fs is satisfied. 8.2.3 Digital Reverberation reverberation in a listening space: Fig. 8.2.15作业：作业：8-1,8-28-1,8-2