PorBleemo is right. There is, however, one extra little trick if you don't like the idea of having to touch your desktop during the operation. If you set up
UltraVNC on your desktop (see
here for a guide to setting up the server on your desktop) and the viewer on your laptop (see
here for that) you will be able to remote control your desktop from your laptop.
None of this is necessary; but if you want to start your music from the other side of the room, or are just too lazy to switch from one mouse and keyboard to another, or just like the coolness of remote control, it is certainly a cute trick.