LM48312: How to connect an audio input using 3 pins XLR cable to LM48312 EVM?

Hi,

My customer is using a Rohde & Schwarz UPV audio analyser to input the audio source to our EVM but the only interface he has is a 3 pin XLR cable. On the EVM, we had 2 pins for each input channel. May I know what is the best way he can inject the audio source to our EVM?

Thanks,

Christina