MATLAB: How to replaced extracted audio files running in a for loop

audioextractionforloopm4a

Hello Community,

I am trying to do some features extractions in m4a, trying to extract and replace several audios which are running in a for loop with the initial 'p'.

Audio_files(p).name consist of individual .m4a files running in the for loop with the initial 'p'.

I am running into some problems with my audiowrite line. How should I rewrite the line? What am I missing here? Thank you in advance! 🙂

[data,samp_rate] = audioread(Audio_files(p).name);
%% equations worked on the audio file and get s, the new starting point of the audio
startSample = s;
endSample = length(data);
extractedData = data(startSample:endSample);
audiowrite(Audio_files(p).name '.m4a', extractedData,fs );

Best Answer

audiowrite cannot save the file in .mat format. Use extension of an audio file. Also use concotenation brackets [ ]

audiowrite([Audio_files(p).name '.wav'], extractedData,fs );

Related Solutions

MATLAB: Audio extraction from individual/selective data column.

% it seems from the screenshot that your data is n by 2 matrix
% thus length(data) only gives you n
% endSample = length(data);
% better:
endSample = size(data, 1);
% again your data is n by 2, this way, you end up with extracting only the
% first column
% extractedData = data(startSample:endSample);
% do this way if you want to work on the second column
extractedData = data(startSample:endSample, 2);

what error was shown for your second part of the code?

audioread gives you option to select samples to read. You don't need to read them all and extract what you want from there like you've done. see https://www.mathworks.com/help/matlab/ref/audioread.html#btiabil-1-samples

MATLAB: Audio file (.wav) being overwritten

You have

speech = ('coch4.wav');
speech2 = speech;

So your speech2 filename is the same as your speech filename.

[y,Fs]=audioread(speech2); %don't use wavread or audioread

So you read from coch4.wav via speech2 filename

audiowrite(speech, speech_trimmed, 44100);

and then you write to the file name given by speech, which is the same as the filename given by speech2, so you are writing to the same file that you read the data from.

Best Answer

Related Solutions

MATLAB: Audio extraction from individual/selective data column.

MATLAB: Audio file (.wav) being overwritten

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