The HDSP 9632 supports all of RMEs existing Expansion Boards (EXB) providing alternative or additional physical IO interfaces. The standard audio boards accommodate sample rates to 48kHz and include the AEB4I, AEB8I, AEB4O and AEB8O (which provide four or eight analogue inputs or outputs, respectively), as well as the TEB board with its TDIF interface.However, to complement the high-sample-rate facilities of the HDSP 9632, two new cards have been added to the range. These are called the AI4S 192 input and AO4S 192 output expansion boards, each of which provides a backplate connection panel with four TRS jacks offering additional IO with the same specifications as the onboard 192kHz converters. These interfaces are balanced and can be configured for three different operating levels in the same way as the main board. With these two new interface cards fitted alongside the HDSP 9632, the system can provide up to six analogue inputs andor outputs, all with 24192 resolution.To take advanta ge of the Steady Clock system, a dedicated 9632 word clock module is also available, which provides a transformer-isolated (to avoid ground loops) word clock input and two word clock outputs, all connected via BNC sockets.