For room measurement first I connected a microphone to a soundcard in a PC running Windows but I would prefer to use the Parallella instead.
Working on the feasibility phase I selected the PCM3052A (which beside the ADC integrates a mic pre-amp with balanced inputs and SPDIF output as well) and added a 8-bit MCU for the settings (I2C). The module runs on a 9V battery and I did a quick test of a spectrum analysis with the PC.
I also ordered this DIY kit which looks significantly better and I want the compare the performances of both modules when doing room measurements (I intend to make a PCB with proper shielding for the PCM3052 because the current module is for feasibility only).
Time to get back to a bit of VHDL...