INPUT AND OUTPUT PATCHING 81The I/O Patching Window 81Selecting Sources and Destinations 81Understanding Ports 82Icons 83Channel Settings 83Layer View 83Surface Interaction 83Connected Destination 83Information Display 83Viewing and Sorting 84Making a Patch 84Moving a Destination 84Protect a Patch from Memory Loads 85Isolating a Patch 85Removing a Patch 85Inputs 1 and 2 85Patching Outputs to Inputs 85INPUT CONTROLS 86I/O Box Input Port 86The Channel Input 86Input Control Mode 87Mic/Gain 88Group Input Controls 88Linking Input 1 and Input 2 Trims 88Replay 89SOURCE AND DESTINATION PROTECTION 90Destination Protection 91Source Protection 92User Memory Load Protection 92EXTERNAL INPUTS 94Creating External Inputs 94Removing External Inputs 95Labelling External Inputs 95Patching to External Inputs 95Monitoring External Inputs 95Metering External Inputs 96DIRECT OUTPUTS 97Assigning a Direct Output 97Removing a Direct Output 97Downmix/Spill 97Direct Output Controls 976 SUMMA Networked Audio Production System CONTENTS