Use the ACR-212 AudioCast Receiver from Soundcast to turn your PC into a music server. Just connect the ACR-212 AudioCast Receiver to your sound system and the AudioCast Transmitter (separate) to your PC. You can also create two music zones when you use two receivers per transmitter.
150' operating radius
3 channels of reception
Use 2 receivers and 2 transmitters to create 4 distinct music zones