Everytime I use the audiowrite and audioread function, it adds some noise to my original signal. Does this happen just to me?

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Visweshwar Srinivasan 2018-6-8

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https://ww2.mathworks.cn/matlabcentral/answers/404777-everytime-i-use-the-audiowrite-and-audioread-function-it-adds-some-noise-to-my-original-signal-doe

回答： Walter Roberson 2018-6-8

采纳的回答： Walter Roberson

Frequency response plot of the signal before audio writing:

Frequency response plot of the signal after audio writing:

PS : The frequencies peaks of the signal are 20, 20.5 and 21KHz respectively.

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Visweshwar Srinivasan 2018-6-8

编辑：Visweshwar Srinivasan 2018-6-8

Thanks for the reply, the class of the variables used is double, both before writing and after reading. The range of this signal is 0 and 2.1369, which means the modulus(maximum) of this signal is greater than 1, so is this because the signal is getting clipped due to this fact? Also, I have plotted frequencies from 0 to fs, where fs is the sampling frequency (44.1KHz). The frequency peaks are 20, 20.5 and 21 KHz, and the other part is due to complex conjugate symmetry of the signal.

Visweshwar Srinivasan 2018-6-8