Howard Roll wrote:I interpreted the OP as "all the other stuff is working" and only the mic input is not. If nothing at all, video or audio, is coming out of the machine I would assume the OP would lead with that.
Ok, so I think we need the OP to chip back in with clarification.
In the event that this is strictly an audio issue from the microphones, then there are several possible concerns here.
One is that many "good" microphones require phantom power. The ATEM Mini series can provide "plug-in" power, which is completely different and is not compatible with phantom power. If the microphone in use requires phantom power, it will not work with the ATEM Mini series switchers unless a phantom power source is placed in between the mic and the switcher.
Another is, as was just pointed out, that the ATEM Mini inputs are unbalanced stereo jacks, while nearly all "good" microphones have balanced mono outputs.
If the mic has an XLR output, for example, you are almost certainly dealing with a balanced mono output.
With a simple XLR to TRS cable adapter, connecting such a mic to a stereo input results in the "-" polarity output being sent to the right channel of audio.
This would result in signal showing on a stereo meter, and if listened to in headphones would result in sound for each ear (assuming stereo output), but if the receiving software on the computer is summing the audio to a mono signal before it gets output anywhere, the "+" and "-" signals from the balanced input would naturally cancel each other out. If this is the issue, there are two ways to resolve it: you can either use a specially designed cable adapter to send only the "+" signal to both the left and right sides of the ATEM mic input, or you can use the software to set the input on the ATEM Mini to mono and mute one side.