Hello,
Using the designer (or code) it would be good if you can select a mp3/wav or something from your computer and when the user presses the button, image, or a clickable item play that sound mp3/wav that was chosen in the designer/code.
I guess the only way to do it at the minute (unless I am wrong) is to add code to the click event to play the file before running the code for that item.
At the moment I think it plays the default android click event sound for buttons if you have the click sound enabled in the Android OS.