During 7 sec 7 tones plays with frequences (all in Hz), one tone -- one sec. Code:
Fs=44100;f=[261.63 293.67 329.63 349.23 392.00 440 493.88];
len = length(f);tau=Df/len;
for i = 1:len
y = y + sin(FF(i)*n).*amplitude;
This question rather for mathematicians. Now I have to see Fourier tranformation. Perhaps it will not accurate vertical Dirac bars but what?
Two bar on edges? How to make beauty picture? And what frequencies will be?