Microphone connection question

Pisound Micro
1

And here I am again :slightly_smiling_face:
I have a question about the microphone connection.
What is this brown rectangular component in this picture? Are those decoupling capacitors? Normally, an electret mic only has two connections.
As I understand it, the line output already has 100 µF decoupling capacitors built in. Does the same apply to the line input?

Since the microphone line input has to be differential, I would like to connect the microphone to A15 and A16. It would be mono. I am just not sure how to wire it properly.
For A13 and A14, am I still able to connect two single-ended inputs?

Basically my goal is to connect an elect microphone, but also 2 single ended mono inputs which would give me a line in stereo signal combined.
How would I do that?

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2

It is just a vertical strip indicating that these wires are connected, like a tiny version of protoboard:

The inputs have 10uF caps.

It should likely work in single ended input mode too, using A14 and A16 pins for right and left channels.

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