I've got a newly built PC, with the M5A99X Evo r2.O mobo, loaded with Windows 7 Home 64bit, which has the dreaded Realtek Audio Manager. I have speakers plugged in through the back of course, and a wireless Logitech/Bluetooth headset little nano receiver plugged into the front. I cannot get sound from both. Only one or the other. For example, if I'm watching a movie on my computer, using the speakers, then turn them off after the movie's over, and put on my headphones for some gaming, no sound to the headphones. I have to go to control panel, and manually select either the speakers or the headset as the default device in order to get sound out of that device. I have tried dl'ing the most recent Realtek driver. No help. And I've gone into the RealTek manager and selected the "Make front and rear output devices playback two different audio streams simultaneously. Still the same. Have to select one or the other as default every time.