Modding the rifters sound box

I've always had a thing for modding my rifters so they can recieve the specialist signals gomming from the audio networks. This allows my to fly with the sounds vibrating the ship. Its nearly almost always tuned to :-

Now after somewhat heated talks over drinks with afew of the other Rebel Rifter Club pilots the decision was also made to update the systems abit more by adding a 8-track.
Upon loading in the first 8-track which i'd had to get salvaged from a old ship wreak i found it was already loaded and was also a vid tape not just audio. Upon watching the contents i was somewhet disturbed and curious. Maybe theres a pilot that can shed some like as to what a d6 is and what this lot are doing?

I'm sure you'll be amussed