Labas, this is indeed very interesting. What measurement equipment/method you're using to capture the signal from the moss? What type of biosignal do you think its capturing?
The device (that one with naked chips) measures microcurrent fluctuations (biodata) occurring on the surface of the moss. Then it generates MIDI signals/notes from the changes of electrical conductivity between two electrodes. The midi signals are sent to any musical (or it may be graphic) synthesiser and we have sound accordingly.