making loop mat lab

hello

am working no signals using the code below I want to make this code to run for more then one folder can someone help please

clc,clear ,close all

 % get a section of the sound file
[x, fs] = audioread('a14.wav');   % load an audio file
x = x(:, 1);                        % get the first channel
N = length(x);                      % signal length
t = (0:N-1)'/fs;                     % time vector
a14 = table(t, x);

writetable(a14, 'a14.csv', 'Delimiter',',')

[sam aldoss]

no its not duplicate the code that I got it only load one file at time which good but think if you have more then 3000 file how you can run this code

Answer 1

[Stephen23]

"... but think if you have more then 3000 file how you can run this code"

Start by reading the MATLAB documentation:

https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html

This example is based on the one in the help:

P = 'directory where the files are saved';
S = dir(fullfile(P,'*.wav'));
S = natsortfiles(S); % optional, see below
for k = 1:numel(S)
    [x,fs] = audioread(fullfile(P,S(k).name));
    ... your processing
    S(k).data = any array that you want to store
end

All of the data will be in the data field of the structure S:

https://www.mathworks.com/help/matlab/matlab_prog/access-multiple-elements-of-a-nonscalar-struct-array.html

If you want the filenames to be read in alphanumeric order then you will need to sort them. An easy way to sort filenames into alphanumeric order is to download my FEX submission natsortfiles.

[sam aldoss]

hello thanks a lot for you help its load some data which seem to be useful , but in this section its shows

Brace indexing is not supported for variables of this type.

Error in test1 (line 13) [x,fs] = audioread(fullfile(D,N{k}));

[Stephen23]

You need to have defined N as a cell array this:

N = {S.name};

or using natsortfiles, as I showed you. Cell arrays use brace indexing.

Answer 2

[Jayant]

you can try following

% get a section of the sound file

count=1;

for count=1:NumberOfFiles %% NumberOfFiles==> total number of your audio files

[x, fs] = audioread(['a' count '.wav']); % load an audio file like a1.wav, a2.wav, a3.wav...

x = x(:, 1); % get the first channel

N = length(x); % signal length

t = (0:N-1)'/fs; % time vector

a14 = table(t, x);

end

[sam aldoss]

its saying Error using audioread (line 74) The filename specified was not found in the MATLAB path.