Reading, resampling and writing audio files

I have multiple audio files in one folder having file format like C_01_ECHO_FA.wav, C_01_ECHO_FG.wav, C_01_ECHO_MK.wav, C_01_ECHO_ML.wav and again C_02_ECHO_FA.wav, C_02_ECHO_FG.wav, C_02_ECHO_MK.wav, C_02_ECHO_ML.wav and so on like this... The sampling freq of these files are 48k. I need to read all the audio files one by one and resample them to 8k and then write all output audio files in different folder. For the single file, i did like this but i need to do for all. [y,Fs] = audioread('C_01_ECHO_FA.wav'); y_resamp = resample(y,8000,48000); audiowrite('C_01_ECHO_FA_new.wav',y_resamp,8000);

Answer 1

[Deepak Gala]

This should do what you want.

[y,fs]=audioread('file48000.wav'); audiowrite('file8000.wav',y,8000);

[Rahul Jaiswal]

Thank you for the answer. But i can do with the single file. I have say, 10 different files in one folder. I need to read them one by one automatically, resample each one and write those files in another folder. Mainly the problem is reading all wav files one by one from one folder automatically and writing them one by one in another folder after resampling.

[Laureano Moro]

The resampling is missing in this answer. The new file 'file8000.wav' will not be resampled at 8kHz unless y = resample(y,8000,48000); is included before the use of audiowrite.

Answer 2

[Laureano Moro]

To do it automatically:

sAudioFolder='MyAudiofolder'; eFiles=dir(fullfile(sAudioFolder,'*.wav'));

for i=1:length(eFiles)

    sAudioFile=fullfile(sAudioFolder,eFiles(i).name);

    [y,Fs] = audioread(sAudioFile); y_resamp = resample(y,8000,48000);

    sAudioFileOut=fullfile(sAudioFolder,[strrep(eFiles(i).name,'.wav','') '_new.wav']);

    audiowrite(sAudioFileOut,y_resamp,8000);

end

[shweta singh]

very good code

Answer 3

[Deepak Gala]

This should work!

for i=1:1000
    FILE1=sprintf('file48000_%d.wav',i);
    FILE2=sprintf('file8000_%d.wav',i);

      FOLDER_NAME = 'C:\.......\ReadingFolder';
      userpath(FOLDER_NAME);
      [y,fs]=audioread(FILE1);

      FOLDER_NAME = 'C:\.......\WritingFolder';
      userpath(FOLDER_NAME);
      audiowrite(FILE2,y,8000);
  end

[Rahul Jaiswal]

Thanks dear !