This Studer AES/EBU M1 card, part number A949.0424, comes with input and output SRCs. It's a great addition for your D21m or D23m, offering enhanced audio processing capabilities.

Using this Studer AES/EBU M1 card is easy. First, make sure your D21m or D23m device is turned off. Then, carefully insert the card into the appropriate slot. Once it's in place, turn on your device. When using, avoid exposing the card to extreme temperatures or moisture. For maintenance, gently clean the card with a soft, dry cloth every few months to keep it in good condition. If you run into any issues, don't hesitate to contact Studer's customer support.