Ilya Rotov asked . 2021-12-13

How to create sounds with specific characteristics?

 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

This is my third try

 %%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');

sound , dsp , digital signal pro... , audio