Mackie Digital Boards/ Alesis BRC - here is the scenario - Customer has ADATs, BRC, Digital 8 buss, and light pipe inputs from ADATs to the 8 Buss. Customer MUST have a a terminator on the word clock connection between BRC and the light pipe cards in the 8 buss. You will not get audio if you do not terminate the word clock - kinda important. The hardware you need to terminate the word clock are a BNC "T" connector and a 50Ω BNC terminator. You plug the "T" connector into the BRC, one end of the T gets terminated, the other end of the T connects via your normal word clock cable to the 8 buss.