main.m

matlab的滤波器

fs=44100;
[x1,fs]=wavread('music');
a=menu('请选择操作','原始信号','IIR滤波器','FIR滤波器','退出')
if a==1
    sound(x1,fs);
    f=fft(x1,length(x1));
    printf2(x1,abs(f),abs(length(x1)));
    main;
elseif a==2
    b=menu('请选择所要的IIR滤波器','iirlowpass','iirhighpass','iirbandpass','返回上页')
    if b==1
        iirlowpass;
        main; 
    elseif b==2
        iirhighpass;
        main;
    elseif b==3
        iirbandpass;
        main;
    elseif b==4
        main;
    end
elseif a==3
    c=menu('请选择所要的FIR滤波器','firlowpass','firhighpass','firbandpass','返回上页')
    if c==1
        firlowpass;
        main;
    elseif c==2 
        firhighpass;
        main;
    elseif c==3
        firbandpass;
        main;
    elseif c==4
        main; 
    end
elseif a==4
    a=0;
end