balena sound optimization of Delay time, Input device

I tested the balena sound and it works very well.
It was very impressive.
In the input device
Due to delay time & latency
I’m wondering if it is possible to input a USB microphone or AUX line directly instead of Bluetooth or Airplay.
Or I would like to know how to reduce the latency. The delay is a stumbling block to using the balena sound for speakers that directly teach with a microphone and output it.

Please help …

That seems like an interesting use case! Looks like you are using it in a classroom environment?
Can you please open a pull request on GitHub here -