I HAVE BEEN GIVEN A .WAV FILE(SOUND). I HAVE TO WRITE A PROGRAM IN MATLAB THAT:
1) READS THE FILE
2) DISPLAY WAVEFORM
3)COMPUTE AND DISPLAY FREQUENCY DOMAIN
 

buddieee . .. do you have to do that in the course elctronics II, i mean the upper division elective . ..  we have to take matlab ... that what i took but we didnt do the wave functions that displays graph cause of limited time . . but when you open the matlab . .. just use the help button .  that gives you a lot of what you want

 

i need  a concrete program. i have no time to do all the researches.help please...........

script or simulink program?

Here U go dude:

clear all;

close all;

clc;

% import a auio sample

[y,Fs,nbit]=wavread('your_audio.wav');

% extract left channel only

left=y(:,1);

% calculate the time scale

Ts=1/Fs;

[nsamples,c]=size(y);

tscale=0:Ts:(nsamples-1)*Ts;

%plot left and right channel in time domain

plot(tscale,left,'r');

xlabel('Time (sec)');

ylabel('Amplitude');

%compute the FFT with the proper sampling frequency

fmax=Fs;

%how many points the FFT must be computed on?

N=nsamples;

tscale=0:Ts:(N-1)*Ts;

%N=number of FFT points:

% change it and test the different resolution

fscale=linspace(0,fmax/2,floor(N/2));

spectrum=fft(left,N);

%plot the spectrum of the signal using the appropriate

% frequency scale and module of the coefficients

%plot the magnitude

figure(2);

plot(fscale,abs((spectrum(1:length(fscale)))));

xlabel('Frequency Hz')

ylabel('Module')

ha ha.. I feel sorry for people coming here seeking someone to do their assignments for them. A little help/hits are fine but getting someone else to do it bothers me. You should just drop out of school if you are not prepared to spend time learning.

JHAPALIKETO,

at least appreciate the work done for you

Dude ! somewhere in the code just write that "I have cheated in this assignment". I bet, this guy will submit as it is and he will be caught. haha

madhab6, i really appreciate your help and everyone, time nabhayera maile yo thread herna bhai raheko thiyina. thanks buddy