One thing we hear all the time from folks who dislike remixes or mashups aren't "real" music is that a computer isn't a real "instrument." However, when I see and hear artists like Girl Talk, Kutiman and Pogo, I can't see how anyone with any ounce of intellectual honesty can claim that these are not true musicians in every sense of the word. And yet, people still argue that they're not, saying that sitting at a computer cutting up sounds isn't the same thing as playing a real "instrument." But... I point out that if someone is sitting at an electronic keyboard and pressing the keys, all they're really doing is playing a sound created by someone else. Is that really all that different than mashing up sounds played by someone else? What if you take things a step further and program clips of other songs into a keyboard and have someone play it?
Step on up, Madeon. While it's not a keyboard directly but (perhaps more impressively) a Novation Launchpad, this 17-year-old recently released this incredible video of him mashing up 39 of his favorite songs into one song... live. I defy anyone to claim that what he's doing here is anything less than a musician playing a keyboard or guitar:
Just like a musician, he's using an instrument and the sounds that it makes to create something new and wonderful.