How to increase the length of an audio file with random white noise?

Question

Yasir Khan 2016-7-3

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https://ww2.mathworks.cn/matlabcentral/answers/293540-how-to-increase-the-length-of-an-audio-file-with-random-white-noise

回答： Image Analyst 2016-7-3

Hi, sorry if this does not make too much sense but here goes.

I have audio files, which are a second or less. I want to add random noise to the audio file (which is a wave file) at different levels of distortion too, so that the total audio length is 2.5 seconds. The level of random noise should be adjustable.

I am complete newby at Matlab and would appreciate the help.

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Answer 1

Image Analyst 2016-7-3

2
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https://ww2.mathworks.cn/matlabcentral/answers/293540-how-to-increase-the-length-of-an-audio-file-with-random-white-noise#answer_227517

在 MATLAB Online 中打开

Use the semicolon operator. For a mono signal

[y, Fs] = audioread('guitartune.wav');
% Crop to 1 second
y = y(1:Fs);
% soundsc(y, Fs);
% Make noise
noiseSignal = rand(length(y), 1);
% Concatenate noise.
outputSignal = [y; noiseSignal];
% Play the sound
soundsc(outputSignal, Fs);