In a message dated 12/1/98 3:45:55 PM US Mountain Standard Time, keymo@stones.com writes: << the files contained in the sound lib zip file, do you have to have a speaker to hear them? or can you just plug in some headphones? (or an am radio) >> You can use earphones, but you need a 3.5mm->2.5mm converter. If you hold your calc RIGHT up to a blank AM station you can also hear the music/sound.