Fig. 2.
Scale-free music of the brain. The left panel shows the translation rules. Parameters of EEG, such as amplitude, period and power, are translated to the parameters of a note in music, such as pitch, duration, and volume, respectively. The timbre is arbitrarily defined as a piano or other instrument. The right panel is an illustration from EEG (up) to music MIDI (middle) and score (bottom)
(the right panel is reproduced with permission from Wu et al. 2009)