May I ask can I change the value of the maximum amplitude of wav file and save as new wav file?

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loong seow li
loong seow li 2016-4-30
编辑： loong seow li 2016-4-30
May I ask can I change the value of the maximum amplitude of wav file and save as new wav file? For example I want to change max1 and max2 to other value and save as other wav file after change it.
[y,Fs] = audioread('test4.wav');
amplitudes = abs(y);
left=y(:,1);
max1 = max(abs(left));
right=y(:,2);
max2 = max(abs(right));
disp(max1);
disp(max2);

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