I apologize if this has already been answered. I have an hd500. There are a few FX on 500 that are not yet on Helix. Is there a way to connect Helix and 500 digitally, so there are no D to A conversions needed? The 500 can accept a digital signal via the variax connection. Can the Helix route an acceptable digital signal out its Variax port to the 500's? If yes, then the 500 can output the signal via spdf and I believe the Helix has spdf input capability. Please let me know if possble or if there are other digital connection options open. Thanks