- either keep only the selected audio files in the current directory
- or make a list of the selected files (instead of audio_files=dir('C:\toolbox\aud_file2\*.wav'); ) and loop through that list , either randomly or not
Psychtoolbox: How to play selected audio files?
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I would like to play Beep and selected audion files alternately.
How should I write a code to play selected audio files?
I have a code to play all audio files randomly but I want to play only selected files and not randomely.
% Code for Audio multiple files read
audio_files=dir('C:\toolbox\aud_file2\*.wav');
% initializes sound driver...the 1 pushes for low latency
InitializePsychSound(1);
% opens sound buffer at a different frequency
pahandle = PsychPortAudio('Open', [], [], 2, []);
%randomize
a=randperm(80);
for i=1:length(audio_files)
% load sound file (make sure that it is in the same folder as this script)
[soundData freq ] = audioread('Beep1000convert.mp3');
% loads data into buffer
PsychPortAudio('FillBuffer', pahandle, soundData');
% how many repititions of the sound
repetitions=1;
%starts sound immediatley
PsychPortAudio('Start', pahandle, repetitions,0);
% stop
PsychPortAudio('Stop', pahandle, 1,0);
% load sound file (make sure that it is in the same folder as this script)
aud_file=strcat('C:\toolbox\aud_file2\',audio_files(a(i)).name);
[soundData freq]=audioread(aud_file);
% wait
rs = randperm(3);
WaitSecs(2.0);
% fill buffer
PsychPortAudio('FillBuffer', pahandle, soundData');
% starts sound immediatley
PsychPortAudio('Start', pahandle, 1,0);
% stop
PsychPortAudio('Stop', pahandle, 1,0);
4 Kommentare
Mathieu NOE
am 22 Okt. 2020
hello
see example below
if you want to loop automatically through the directory (all files) , you can do like this :
% method for looping through all files in directory
file = dir ('*.wav');
M= length (file)
%%%%%%%%%%%
NFFT = 512;
NOVERLAP = round(0.75*NFFT);
w = hamming(NFFT);
%%%%%%%%%%%
for ck = 1:M
[data,Fs]= audioread(file(ck).name);
[sensor_spectrum, freq] = pwelch(data,w,NOVERLAP,NFFT,Fs);
figure(ck),plot(freq,20*log10(sensor_spectrum));
title(['Spectra / Fs = ' num2str(Fs) ' Hz / Delta f = ' num2str(freq(2)-freq(1)) ' Hz ']);
xlabel('Time (s)');ylabel('Frequency (Hz)');
end
if you want to creat a short list manually you can do (old fashioned way but still works ) :
% method for looping through manual files list
% file names = strings
% make sure to have all strings same length (add trailling blank for shorter names)
file(1,:) = 'Approach_Gear_Drop_Aft Ctr.wav';
file(2,:) = 'Approach_Gear_Drop_Aft LH.wav ';
file(3,:) = 'Approach_Gear_Drop_Aft RH.wav ';
M = 3;
%%%%%%%%%%%
NFFT = 512;
NOVERLAP = round(0.75*NFFT);
w = hamming(NFFT);
%%%%%%%%%%%
for ck = 1:M
[data,Fs]= audioread(file(ck,:));
[sensor_spectrum, freq] = pwelch(data,w,NOVERLAP,NFFT,Fs);
figure(ck),plot(freq,20*log10(sensor_spectrum));
title(['Spectra / Fs = ' num2str(Fs) ' Hz / Delta f = ' num2str(freq(2)-freq(1)) ' Hz ']);
xlabel('Time (s)');ylabel('Frequency (Hz)');
end
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