PC audio not playing through Spark

  • I just updated to the latest Spark firmware and now I cannot hear the PC through the amp via the USB cable. Any ideas what changed? I have an on-line lesson site I like to combine with all of my music for when I need drills and right now I have two headphones on, one pair for my guitar through Spark and then other for my PC. I am getting audio from my spark app on my android through my Spark just not my PC audio. Note it shows in my device manager under Sound, video, and game controllers but not under Audio inputs and outputs.