Question

I need to listen do re mi fa notes in matlab.Can u help ne about codes?

Answer 1

Simple sine waves are not going to sound like music even if you string them together. I'm not a music expert by any stretch of the imagination, but an A played on a piano vs. guitar sounds different (and much richer) because of the harmonic structure.

I have not done the notes in the order you give, but you can easily modify:

Fs=8000;

Ts=1/Fs;

t=[0:Ts:0.3];

F_A = 440; %Frequency of note A is 440 Hz

F_B = 493.88;

F_Csharp = 554.37;

F_D = 587.33;

F_E = 659.26;

F_Fsharp = 739.9;

notes = [F_A ; F_B; F_Csharp; F_D; F_E; F_Fsharp];

x = cos(2*pi*notes*t);

sig = reshape(x',6*length(t),1);

soundsc(sig,1/Ts)

OR I HAVE A BIRTHDAY SONG CODE bt you can modify it according to your requirements.. Hope you like it

% if you know the generation of sine wave, you can compose any tune in the
% matlab
clc;
clear all;
close all;
t = 0:1/8000:0.5;
k = 2; % frequency scale
% music tone frequencies
C4 = sin(2*pi*k*261.6*t);
c4 = sin(2*pi*k*277.2*t);
D4 = sin(2*pi*k*293.7*t);
Eb4 = sin(2*pi*k*311.1*t);
E4 = sin(2*pi*k*329.2*t);
F4 = sin(2*pi*k*349.2*t);
f4 = sin(2*pi*k*370.0*t);
G4 = sin(2*pi*k*292.0*t);
g4 = sin(2*pi*k*415.3*t);
A4 = sin(2*pi*k*440.0*t);
Bb = sin(2*pi*k*466.2*t);
B = sin(2*pi*k*493.9*t);
C5 = sin(2*pi*k*523*t);
% Here the harmony or the order of birthday tunes order
% C4 C4 D4 C4 F4 E4 C4 C4 D4 C4 G4 F4 C4 C4 C5 A4 F4 E4 D4 Bb Bb A4 F4 G4 F4
m = [C4 C4 D4 C4 F4 E4 C4 C4 D4 C4 G4 F4 C4 C4 C5 A4 F4 E4 D4 Bb Bb A4 F4 G4 F4];
m1 = [m m];
sound(m1,8000);
% just run the program and enjoy the brithday song.