hi, recently bought a numark omni control. drivers installed fine and software works well. the only problem i am having is that my PFL toggle is doing nothing and my headphone output is just master output. Therefore my headphones only play what the speakers are playing. Im relatively knew to the hardware side and ive got some simple speakers plugged into 'output1' only. As my new amp is being delivered. Will the arrival of the amp allow me to set up the second channel and consequently be able to have different headphone audio to master audio? or is it a software issue? thanks in advance.