I want some help to run audio to two different devices at the same time. I have a usb speaker on the one side and onboard audio. I had connected a headphone to the onboard audio. When I play sound only the usb speaker respond. There is no sound in the headphones. I tried to connecting my desktop speakers on the onboard audio port but the issue lies still the same. I need some help here to make this thing. Any idea how to do this.