ProGrid digital device consists of interface devices with MADI input and output ports or AES/EBU ports. All PG2-MADI devices have two MADI input and two MADI output ports, allowing the transmission of up to 128 input and 128 output digital audio channels. Each MADI port can be adjusted to handle different formats according to AES10 standards.The PG32-AES device offers four principal ports for connection and transport of a total of 32 AES/EBU digital audio channels, i.e. 64 mono channels.