How to truncate number of sample in audiofiles using audioDatastore function in MATLAB?

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kc 2020-4-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/519865-how-to-truncate-number-of-sample-in-audiofiles-using-audiodatastore-function-in-matlab

评论： kc 2020-4-25

Hi all

I am using audiodatadatastore function to classify my speech signal using wavelet scattering . Unfortunately all my audio files are having different length or sample size. I want to make it uniform for all files.

I did try following

% while hasdata(ads)

% [data,info] = read(ads);

% if length(data)<45000

% data=[data;zeros(45000-length(data),1)];

% else

% data=data(1:45000);

% end

But that’s of no use. Help is highly appreciated.

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Walter Roberson 2020-4-25

Note: in your release the link to your example should be https://www.mathworks.com/help/releases/R2018b/wavelet/examples/music-genre-classification-using-wavelet-scattering.html

kc 2020-4-25

Yes sir I am using that example only there each speech sample is of 30 sec duration.

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采纳的回答

Walter Roberson 2020-4-23

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/519865-how-to-truncate-number-of-sample-in-audiofiles-using-audiodatastore-function-in-matlab#answer_427791

在 MATLAB Online 中打开

data(45001, :) = 0;
data = data(1:45000, 1);

No if needed, and handles multiple channels converting to single channel.

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Walter Roberson 2020-4-25

It will take me more searching and testing. It turns out that audioDataStore ignores custom readFcn so it might be necessary to recode it for to use a datastore of type 'File'.

kc 2020-4-25