How can I create sounds with MATLAB with the following characteristics:
Sound 1:
pitch: 3 sinusoidal partials of 500, 1000 and 1500 Hz duration: 100 ms (including 5 ms rise and fall times) amplitude: 80 dB
Sound 2:
like Sound 1, but with a cutting out of 10 ms (5 ms fall / rise included) from the middle of the sound
%%configure signal settings
duration = 0.1; % duration in seconds
amplitude = 0.8; % amplitude
f1 = 500; % frequency in Hertz
f2 = 1000; f3 = 1500; phi = 2*pi*0.5; % phase offset, e.g.: 2*pi*0.25 = 1/4 cycle
%%configure output settings
fs = 44100; % sampling rate
T = 1/fs; % sampling period
t = 0:T:duration; % time vector
%%create the signal
omega1 = 2*pi*f1; % angular frequency in radians
omega2 = 2*pi*f2; omega3 = 2*pi*f3; partial1 = cos(omega1*t + phi)*amplitude; % sinusoidal partial 1
partial2 = cos(omega2*t + phi)*amplitude; % sinusoidal partial 2
partial3 = cos(omega3*t + phi)*amplitude; % sinusoidal partial 3
signal = (partial1 + partial2 + partial3)/3; %%plot the signal
plot(t, signal); xlabel('Time (seconds)'); ylabel('Amplitude'); title('Complex Signal'); %%play the signal
sound(signal, fs); %%save signal as stereo wave file
stereo_signal = [x1; x1]'; wavwrite(stereo_signal, fs, 'test.wav');
I am wondering how to adjust the amplitude and to implement the rise and fall.
Looking forward to your help! Thanks in advance!
Best Answer