highpass.java

随书代码 上面有书中的大部分代码

//: interfaces/filters/HighPass.java
package interfaces.filters;

public class HighPass extends Filter {
  double cutoff;
  public HighPass(double cutoff) { this.cutoff = cutoff; }
  public Waveform process(Waveform input) { return input; }
} ///:~