This Studer card, part number A949.0427, offers four high - quality analog microphone and line inputs for seamless audio integration in the D21m Modular I/O System.

To use this Studer microphone/line input card, first make sure your D21m Modular I/O System is powered off. Carefully insert the card into the appropriate slot in the system. Once it's securely in place, you can connect your analog microphones or line - level devices to the four input ports. When powering on the system, ensure all connections are stable. For maintenance, keep the card in a clean and dry environment. Avoid exposing it to extreme temperatures or humidity. If you notice any issues with the audio quality or the card itself, check the connections first. If the problem persists, it's best to contact Studer's customer support.