How can i read wave files to a column vector?

Hi All!

I would like to read many wave files to a column vector, where i can reach each of them anytime. Pls help me to do this.

Here is my source code:

clear; clc;

myFolder = 'C:\Users\Aron\Samples\proba';

if exist(myFolder, 'dir') ~= 7

Message = sprintf('Error: The following folder does not exist:\n%s', myFolder);

uiwait(warndlg(Message));

return;

end

filePattern = fullfile(myFolder, '*.wav');

wavFiles = dir(filePattern);

for k = 1:length(wavFiles)

baseFileName = wavFiles(k).name;
fullFileName = fullfile(myFolder, baseFileName);   
fprintf(1, 'Now reading %s\n', fullFileName);   
[sampleArray, Fs] = wavread(fullFileName);

end

%sound(sampleArray, Fs);

In this case i can only reach the last sample, because of the loop. How can i play the chosen sample???If for example there are 80 samples that folder and i just want to play the 50th sample.

Thx in advance

Answer 1

[Ken Atwell]

Rather than having sampleArray hold only the most recently read WAV file, make sampleArray a cell array of all of them. You would also need make Fs a vector of all sample rates. Your code would look something like this (written from memory, untested):

 sampleArray = cell(length(wavFiles),1);
 Fs = zeros(size(sampleArray));
 for k = 1:length(wavFiles)
    baseFileName = wavFiles(k).name;
    fullFileName = fullfile(myFolder, baseFileName);   
    fprintf(1, 'Now reading %s\n', fullFileName);   
    [sampleArray{k}, Fs(k)] = wavread(fullFileName);
 end

To play the 50th sample:

 sound(sampleArray{50}, Fs(50));

Keep your eye on your application's memory usage. If you have lots of long WAV files in memory, your application will potentially use a lot of memory.

[Áron Laczkovits]

Thank you Ken, Its working, if i will have more question, can i ask u? The aim is to program the simplest sampler.