This Studer card, with part number A949.0427, offers four analog microphone/line inputs, perfect for your audio setup.

To use this Studer card, simply connect it to your D21m Modular I/O System. Make sure the system is powered off before making any connections. For the microphone/line inputs, connect your audio sources like microphones or line - level devices. When using, avoid exposing the card to extreme temperatures or moisture. For maintenance, keep the card clean by gently blowing away dust. If you notice any performance issues, check the connections first. Don't touch the electronic components with bare hands to prevent static damage.