Is it possible to save audio sample values from alteration while using wavwrite function?

Hello, I am manipulating values of audio samples for audio steganography.When i have my manipulated audio sample object, i want to write it as a new audio file using wavwrite. But when i create object of this newly created audio file, i find sample values different from the previous values of samples which i had manipulated.

Is there any method to control wavwrite function in order to keep my sample values as same as these were before wavwrite?

My original audio object is:

>> y=wavread('C:\Users\HIM\Desktop\audio stegno\strings.wav');

>> y(1:7)

ans =

1.0e-003 *

         0
         0
   -0.2136
    0.0916
    0.3052
    0.3052
    0.2136

New audio object created:

>> y2=y;

>> y2(1:7)=0.0005;

>> y2(1:7)

ans =

1.0e-003 *

    0.5000
    0.5000
    0.5000
    0.5000
    0.5000
    0.5000
    0.5000

>> wavwrite(y2,44100,'k.wav') >> s=wavread('k.wav'); >> s(1:7)

ans =

1.0e-003 *

    0.4883
    0.4883
    0.4883
    0.4883
    0.4883
    0.4883
    0.4883

Values of samples changed in object 's'.

I want that values of samples in 's' should remain same like in 'y2'.

Answer 1

[Walter Roberson]

http://uk.mathworks.com/matlabcentral/answers/168957-problem-saving-and-reading-an-audio-file#answer_206259