?? p_local.m
字號:
% feedback effect on drum sound
% to use file, enter p_local in MATLAB command window
% drum sound track recorded by Nick Chbat
% m file by Joe Chow
%%%%%%%%%%%%%%%%%% p_local.m %%%%%%%%%%%%%%%%%%%%
% Discrete-Time Control Problems using %
% MATLAB and the Control System Toolbox %
% by J.H. Chow, D.K. Frederick, & N.W. Chbat %
% Brooks/Cole Publishing Company %
% September 2002 %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
load local
fs = 16384 % sampling rate
t=[0:length(local)-1]'/fs;
figure(1), plot(t,local)
xlabel('Time (sec)')
ylabel('local')
title('Original drum beats')
sound(local,fs)
pause
D = 200;
a = 0.9;
num = [1 zeros(1,D)];
den = [1 zeros(1,D-1) -a];
T = tf(num,den,1)
y = lsim(T,local);
figure(2), plot(t,y)
xlabel('Time (sec)')
ylabel('y')
title('a = 0.9, D = 200')
sound(y,fs)
pause
a = 1.005;
den = [1 zeros(1,D-1) -a];
T = tf(num,den,1)
y1 = lsim(T,local);
figure(3), plot(t,y1)
xlabel('Time (sec)')
ylabel('y1')
title('a = 1.005, D = 200')
sound(y1,fs)
%%%%%%%%%%
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