Grace Design A908DL - Pro Tools DigiLink Option for m908The m908 emulates two HD I O interfaces with a total of 32 channels of I O. There are two ways to connect the m908 to the HDX card or HD Native interface. When connected directly to an HDX or Native port the m908 will appear as two HD I O interfaces and will allow monitoring of 32 channels. When the m908 is connected to an HDX or Native port along with another interface the m908 must be second in the chain. This is because the m908 emulates two HD I O