To use this Studer microphone and line input card, first make sure your D21m Modular I/O System is powered off. Then carefully insert the card into the appropriate slot. After that, you can connect your microphones or line - level audio sources to the four analog inputs. When in use, avoid exposing the card to extreme temperatures or humidity. To maintain the card, you can gently clean it with a soft, dry cloth every few months. If you encounter any problems, consult the user manual or contact Studer's customer service.
