You should be able to plug any microphone that does not require phantom power into the audio input. You may need an adapter from whatever connector your microphone uses to the 3.5mm female jack that's on the audio connector we provide. This 3.5mm connector is stereo, so you probably want to connect your microphone to one of the two channels only.
Then load the "passthrough" example project in the IDE. You probably need to increase the gain on that specific channel before you start it, so browse to the "Project settings" tab and set the PGA (Programmable Gain Amplifier) on that channel to somewhere between 30 and 40. Then start the program. If the sound is too quiet, try increasing the gain (maximum is 59.5), otherwise if your sound is distorted, try decreasing the gain.
You need to restart the running program before the change to gain is applied.