(Full Disclosure: I do own a first gen iPod Touch, that I really like. I have no experience with the Zune, so I’m not in a position to compare the two – in other words, this is NOT meant to start any flame wars.)
A bronze wound steel string that is struck will vibrate to produce sound waves. These sound waves produced can be amplified in, let’s say, a wooden chamber – a wood that man has historically found to produce a rich, pleasing tone, such as spruce, mahogany, cedar, maple, or rosewood. Man has since constructed and some have mastered playing various forms of musical instruments that fit this description: the mandolin, guitar, violin, etc.
One such master is Andy McKee. Just watch below… If you like his music, he does have a couple of albums you can purchase on iTunes. By the way, in case you’re curious, the guitar with the “horn” growing out of the top with bass strings attached is called a harp guitar.