To use your 888/24 as a stand alone'24 bit Analog-Digital or Digital-Analog converter:- Quit Pro Tools if it is launched. - For Analog-Digital conversion, be sure to disconnect or turn off any external digital devices (DAT machines, effects processors, etc.) that may be providing word clock information to the 888/24's AES/EBU or S/PDIF channel 1 & 2 inputs.- An AES/EBU (or S/PDIF -- see below) word clock signal is necessary for Digital-Analog conversion in Stand Alone mode. Be sure to have a digital device providing word clock connected to the AES/EBU inputs 1 & 2 of the 888/24 interface. In Stand Alone mode, the 888/24's default word clock input port is AES/EBU, unless changed to S/PDIF via the corresponding internal jumper setting. Please refer to the 888/24 I/O Installation Guide for specific instructions and guidance.To verify that the 888/24 is in Stand Alone mode:- Check to see that the "analog" LED display for meters 1 & 2 is flashing. The LED flashes between a half-lit state to full display.-Turn off your CPU.