Our readers are an imaginative bunch, and you probably already have some cool uses in mind for your own needs. You want to play music over a Bluetooth speaker or speakers in another room, but also want to keep using the computer.You want to play something on a TV hooked up to your computer for someone else, but also want to keep using the computer and maybe listen to music on headphones while you work.You’re a DJ and want to monitor the music in your headphones that’s playing over the loudspeakers.