Mic-in based Mossbauer spectroscopy is real now!
MossSpectra - Mossbauer spectra acquisition software. Need ~10Hz sync pulses with ~100uS duration and ~10% of full scale amplitude.
MossMake - pre-treatment utility intended to convert *.big files into wide used *.spc files.
Big spectra examples. Here is mic-in aquired mossbauer spectra example named fe_be_mic_in.big.
Poster on ICMSA-2014 conference (in Russian).
Do not hesistate if you have any question, mail me!