MATLAB: Audioread cannot find WAV file

audioreadMATLAB

Hello,

we are trying to load a WAV audio file into matlab for filtering. Oddly, It cannot seem to load the audio file without running into an incorrect path error. I have tried resetting the userpath and have also tried specifying the exact file location of audiofile instead of the file name. I have also tried turning the file location into a string variable named file but the results are the same. I am a bit puzzled in terms of what I might be doing wrong.

userpath("C:\Users\Jerry\Desktop\eeglab_current\eeglab2019_1")
[y,Fs] = audioread("PLEAS_43s_Male_Laugh")

Best Answer

It is likely most efficient to use the fullfile function to identify the file.

Settting the userpath may not be doing what you believe it is doing.

Also, for best results, include the extension:

[y,Fs] = audioread("PLEAS_43s_Male_Laugh.wav")

Obviously I cannot test this, so I am posting it as UNTESTED CODE.

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MATLAB: Randomly picking some files

You can get a directory and then use randperm to get a list of random, non-repeated indexes, or randi to get a list of possibly repeated indexes, or you can use this program I wrote that will play either a random wave file or one that you specify:

% Play a wav file.  You can pass in 'random' and it will pick one at random from the folder to play.
% PlaySoundFile(handles.soundFolder, 'chime.wav');
% PlaySoundFile(handles.soundFolder, 'random');
function PlaySoundFile(soundFolder, baseWavFileName)
  try        % Read the sound file into MATLAB, and play the audio.
%     soundFolder = fullfile(soundFolder, 'Sound Files');
    if ~exist(soundFolder, 'dir')
        warningMessage = sprintf('Warning: sound folder not found:\n%s', soundFolder);
        WarnUser(warningMessage);
        return;
    end
    if strcmpi(baseWavFileName, 'random')
      itWorked = false;
      tryCount = 1;
      while itWorked == false
        % Pick a file at random.
        filePattern = fullfile(soundFolder, '*.wav');
        waveFiles = dir(filePattern);
        numberOfFiles = length(waveFiles);
        % Get a random number
        fileToPlay = randi(numberOfFiles, 1);
        baseWavFileName = waveFiles(fileToPlay).name;
        fullWavFileName = fullfile(soundFolder, baseWavFileName);
        waveFileData = -1;
        try
          if exist(fullWavFileName, 'file')
            [waveFileData, Fs, nbits, readinfo] = wavread(fullWavFileName);
            sound(waveFileData, Fs);
            %     soundsc(y,Fs,bits,range);


          else
            warningMessage = sprintf('Warning: sound file not found:\n%s', fullWavFileName);
            WarnUser(warningMessage);
          end
          % It worked.  It played because the audio format was OK.
          itWorked = true;
        catch
          % Increment the try count and try again to find a file that plays.
          tryCount = tryCount + 1;
          if tryCount >= numberOfFiles
            break;
          end
        end
      end % of while()
    else
  %     baseWavFileName = 'Chime.wav';
      fullWavFileName = fullfile(soundFolder, baseWavFileName);
      waveFileData = -1;
      if exist(fullWavFileName, 'file')
        [waveFileData, Fs, nbits, readinfo] = wavread(fullWavFileName);
        sound(waveFileData, Fs);
        %     soundsc(y,Fs,bits,range);
      else
        warningMessage = sprintf('Warning: sound file not found:\n%s', fullWavFileName);
        WarnUser(warningMessage);
      end
    end
  catch ME
    if strfind(ME.message, '#85')
      % Unrecognized format.  Play chime instead.      
      fprintf('Error in PlaySoundFile(): %s.\nUnrecognized sound format in file:\n\n%s\n', ME.message, fullWavFileName);
       baseWavFileName = 'Chime.wav';
      fullWavFileName = fullfile(soundFolder, baseWavFileName);
      waveFileData = -1;
      if exist(fullWavFileName, 'file')
        [waveFileData, Fs, nbits, readinfo] = wavread(fullWavFileName);
        sound(waveFileData, Fs);
        %     soundsc(y,Fs,bits,range);
      end
    end
    errorMessage = sprintf('Error in PlaySoundFile().\nThe error reported by MATLAB is:\n\n%s', ME.message);
    fprintf('%s\n', errorMessage);
    WarnUser(errorMessage);
  end
  return; % from PlaySoundFile

By the way, WarnUser is simply

function WarnUser(message)
uiwait(warndlg(message));

MATLAB: Need help with cutting 37 seconds off from start of wav file.

[y,fs] = audioread(filename);
filename = 'C:\Users\ajbaf\Music\mlabpost\wm7001.wav';
y(1:37*fs,:) = []; %% this deletes the matrix elements corresponding to the index range 1:37*fs
y(end-3.65*fs:end,:) = [];
wavFileName = 'C:\Users\ajbaf\Music\mlabpost\wmr.wav';
audiowrite(wavFileName, y,fs);

Best Answer

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MATLAB: Randomly picking some files

MATLAB: Need help with cutting 37 seconds off from start of wav file.

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