Pro Audio Support

Q:
How many channels of I/O can each Pro Tools|HD card accommodate? (HD Core or HD Process)How do the new 96 I/O and 192 I/O interfaces connect to the cards and to each other?
 
A:
Each HD DSP card can handle 32 simultaneous bidirectional I/O channels via the DigiLink cable. The first I/O box in the daisy-chain (either 192 or 96) splits those 32 into two 16 channel groups: one group is dedicated to the analog and digital conversion within that box, while the second group is either sent to the second box in the daisy-chain (via the Expansion Port), or is sent to the Legacy port. The Legacy port can connect one 16-channel Legacy box (i.e. 1622), or to two 8-channel Legacy boxes (888|24, AD8000, etc.) via a "Y" cable. Of course, the Legacy port only works at 44.1k/48k.