DIY Controller Question (in- output/microphone/max. pin usage)

Hello

I am going to create a stage with multiple WLED controlled panels and lights.

2x WS2811 layered panels with each 480 LED’s in 4 segments (12v)
2x WS2811 strings with 300 LED’s (12v)
(plus for additional individual strings)

I want to use ESP32 and its recommend to use a max of 4 channels. I would like to design the controller to have 8 channels (two ESP32 boards) to control LED’s.
It must be sound reactive means a mic will be part of the hardware. Now is it okay to have 4 LED outputs and still also use a pin or even two for audio input signal? For sure one mic maybe also a audio plug input. If its suggested that only 4 channels are used for LED control would additional channels for the audio input already drain the quality of the animated LED signal?

In case both ESP32’s are in the same housing, dos anyone know if one microphone can be used for bot boards?

You can run all 8 LED channels from 1 Esp32. Actually you can run up to 10. Adding a mic input(s) should not affect the LEDs.