Look forward to that, something on my list of things to do. Though for the mic array, I want to try out contact microphones, make a whole house far-field array that way, might work, might not, but it will certainly be educational.

One aspect I've worked out is how to make a balanced contact mic using two piezo discs stuck back to back with a rigid layer in between acting as the pickup. Trick is that as the two discs are back to back, they effectively produce a balanced signal and that alone helps eliminate so much of the static/noise that contact mics due to impedance are susceptible too.