For the SSL MADI X8 to accept the MADI signal coming from a Horus or Hapi, signal carrier must be routed on all Horus/Hapi MADI output.
If all groups for the MADI module are not assigned on Horus / Hapi side, the MADI signal will not be accepted by the SSL MADI X8.
Go in Horus / Hapi Setup page > Modules, and select the MADI module connected to the SSL MADI X8.
Example when routing AD 1 to MADI output 1-1.
