Play stimuli from subfolders

Silk

Hi everyone,

I was wondering whether it is possible to have multiple folders in the pool. In my current experiment I have quite a number of stimuli, so it is impractical to have only one folder.

Alternatively, is it possible to load stimulis from subfolders of the experiment folder using javascript and OSWeb? Something like:

var stimuli = new Audio('audio/my_sound.wav');
stimuli.play()

I tried to run this code but it does not play any sound. Any idea?

Thanks,

Silk--

sebastiaan

Hi @Silk ,

Not really, I'm afraid. Just to clarify: When an experiment runs in a browser with OSWeb, the file pool doesn't actually correspond to a folder (unlike when an experiment runs on the desktop). Instead, the file pool is an array-like container of objects.

To get a feel of how this works, you can add a debugger statement to an inline_javascript item and then run the experiment while the browser console is visible. The experiment will then pause an allow you to inspect the JavaScript workspace, including the pool object:

As you can see, the file notify1.ogg is represented as an object with a data property that corresponds to an Audio object. So to play the file in an inline_javascript you would do:

pool['notify1.ogg'].data.play()

See also:

• https://osdoc.cogsci.nl/4.0/manual/javascript/about/#the-pool-object-access-to-the-file-pool
• https://osdoc.cogsci.nl/4.0/manual/debugging/#debugging-in-a-web-browser-osweb

— Sebastiaan