"audioread" multiple audio files in a folder

Hi.

I want to analyze spectrograms of multiple audio files in a folder.

Audio files share the word "SPTGRM" in their names.

Audio files are stereo-type and I will take one channel data.

As shown in the code below, I tried to save these files in the directory and save their data in "Spectrogram Data", but the following error occurred.

[ Error using audioread (line 90)

The filename specified was not found in the MATLAB path. ]

How can I solve this error?

clear all;

audio_files = dir('C:\Users\KOH\Desktop\MATLABcode\Soundsample\SPTGRM*.wav')
for i=1:numel(audio_files)
    [y,Fs] = audioread(audio_files(i).name);
    SpectrogramData(:,i)=y(:,1);
end

[Stephen23]

Why are you using CLEAR ALL? Does your program really need to remove all cached functions from memory, thus slowing down MATLAB? (hint: no). Use CLEARVARS if required, not CLEAR.

Answer 1

[Stephen23]

You need to tell AUDIOREAD the filepath, otherwise it does not know where to find the files.

P = 'C:\Users\KOH\Desktop\MATLABcode\Soundsample';
S = dir(fullfile(P,'SPTGRM*.wav'));
for k = 1:numel(S)
    F = fullfile(P,S(k).name); % you forgot this
    [y,Fs] = audioread(F);
    S.data(k) = y;
end

Answer 2

[Chunru]

clear all;
audio_files = dir('C:\Users\KOH\Desktop\MATLABcode\Soundsample\SPTGRM*.wav')
for i=1:numel(audio_files)
    % You need to specify the folder as well
    %[y,Fs] = audioread(audio_files(i).name);
    [y,Fs] = audioread(fullfile(audio_files(i).folder, audio_files(i).name));
    SpectrogramData(:,i)=y(:,1);
end

Answer 3

[jibrahim]

For future reference, I recommend you use audioDatastore:

https://www.mathworks.com/help/audio/ref/audiodatastore.html

You won't have to worry about finding files. for example:

ads = audioDatastore('C:\Users\KOH\Desktop\MATLABcode\Soundsample','IncludeSubfolders',true);
allSignals = readall(ads) % this reads all the audio files in one shot