Multiple Microphone input

I want to build a hearing aid device with four external microphone inputs working in parallel, is there a way to implement this on the Tympan? if i input the microphone signals as an analog input to the other pins, do I lose the audio processing power that the Tympan is useful for?

Yes, there is a way to implement this.
We have a daughter card, which is the Tympan AIC Shield and it adds another codec for 4 channel in/out.
This product is in house and we will be launching the store page Monday