So after some much troubleshooting with using ASIO4all to get less latency with a guitar into my USB audio interface, I realize finally why I am getting no sound. The Master track is routing back to my audio interface. The audio interface is the only option to choose from the drop down menu in Master routing when I choose ASIO in preferences. Going back to DirectSound I hear everything properly, but it goes back to around 10-15 milliseconds of latency - no good.
If there a way to prevent the Master track from routing to my audio interface? Obviously not getting any sound from there. It needs to be set to Primary Sound Device, I suppose.
Windows 10, 64-bit. Renoise 2.8.0