read all audio files in one directory

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Hi, I want to remove a frequency from all my mp3 songs, my idea is to use the audioread and audioinfo functions to copy a song in my workspace, see if i can use the filter I created, with a sample rate of 44.1kHz and cut out the frequency (1kHz +/- 300Hz). With audiowrite I can create a .wav file without that frequency. But its a lot of work to do that for every song, is it possible to read the first song in one directory, filter it and generate a wav file in another directory and continue with the second song in the directory and so on? audioread expects the whole filename, I have no idea how to find out how many and which songs are in the directory, can anyone help me?

Accepted Answer

Azzi Abdelmalek
Azzi Abdelmalek on 17 Jul 2016
folder='C:\Users\malek\Documents\MATLAB'
audio_files=dir(fullfile(folder,'*.m'))
for k=1:numel(audio_files)
filename=audio_files(k).name
%Do what you want with filename
% create a new file name 'new_file' for example
folder_destination='C:\Users\malek\Documents' % for example
file_dest=fullfile(folder_destination,'new_file'
% .....
end
  12 Comments
Image Analyst
Image Analyst on 30 Nov 2020
OK, so did you call audioread() followed by fft()? If not, why not?
Walter Roberson
Walter Roberson on 30 Nov 2020
see the first example in the fft documentation for information on plotting

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More Answers (1)

Image Analyst
Image Analyst on 17 Jul 2016
  2 Comments
Josh Burt
Josh Burt on 18 Feb 2021
Hola image Analyst
I have attempted to use your code in the link on MatlabFandom - I am struggling to actually save the .wav files I need.
The files are hundreds of audiofiles relating to speach recognition, they all sit in different subfolders, each with its own date (there are 2 files per day). There are hundreds of subfolders with .wav files in them. I would like the .wav files to be read and saved in an array called 'AudioArray'. I run your code below, I receive an output listing all the file names. But there is no raw data available for me to analyse. I also want to do some processing once the file has been read - in this case I have just put max(audioArray) to show this. Gracias for all help!
% Specify the folder where the files live.
myFolder = 'C:\Users\myname\Documents\voicedata\Audio';
% Check to make sure that folder actually exists. Warn user if it doesn't.
if ~isfolder(myFolder)
errorMessage = sprintf('Error: The following folder does not exist:\n%s\nPlease specify a new folder.', myFolder);
uiwait(warndlg(errorMessage));
myFolder = uigetdir(); % Ask for a new one.
if myFolder == 0
% User clicked Cancel
return;
end
end
% Get a list of all files in the folder with the desired file name pattern.
filePattern = fullfile(myFolder, '**/*.wav'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
for k = 1 : length(theFiles)
baseFileName = theFiles(k).name;
fullFileName = fullfile(theFiles(k).folder, baseFileName);
fprintf(1, 'Now reading %s\n', fullFileName);
% Now do whatever you want with this file name,
% such as reading it in as an image array with imread()
AudioArray = audioread(fullFileName);
maxaudio=max(AudioArray); %calculates the max value of each audiostored in audioArray
drawnow; % Force display to update immediately.
end
Image Analyst
Image Analyst on 18 Feb 2021
AudioArray{k} = audioread(fullFileName);
maxaudio(k) = max(AudioArray{k});

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