How to create sounds with specific characteristics?

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 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'); I am wondering how to adjust the amplitude and to implement the rise and fall.   Looking forward to your help! Thanks in advance!