to see what type of file it is befor even clicking on it or downloading it , right click the bar at the top of the screen where your serch results appere. when u right click it you should get a menu , select "type" and it should show a colum that sez what type the files are.

and if you just use the audio search it automaticaly filters all files that arent audio.

just stay away from programs or .exe, .zip , .rar , .bat .com and .dll files (unless you reely know what your doing and you scan everything for virruses befor you open it).