Really struggling getting a microphone set up as input on MODX. Using a simple dynamic mic hooked into mono side of A/D. Mic is DRV100 that I got at Guitar Center along with cable. They assured me it would work with the keyboard. Plugged in and set to Mic on utility panel. When I enable A/D on the keyboard and turn up the gain, all I get is a hum. No sound out of keyboard output from the mic.