Connecting an external microphone

[hystrix]

It's not immediately clear how to connect an external microphone to the Ultra Sound Card. I posted this question over on the GitHub Forum site, but there's not much support there, unfortunately.

• I would like to connect an electret mic to the base card, like this one: [https://micbooster.com/primo-microphone ... fc033.html]. How can this be done? Also, how could two be connected?

• Also, I would like to connect an external MEMS mic to the base card, like this one [https://micbooster.com/ultrasonic-micro ... board.html]. How can this be done? Also, how could two be connected?

Without any circuit diagrams, and no responses over on the GitHub Forum, I'm hoping someone who comes here can help.

Many thanks.