List of audio recordings
track 1 = Beethoven Sonata n.27 op.90, 
track 2 = Locatelli Capriccio n.16 op.3, 
track 3 = Paganini Capriccio n.15 op.1, 
track 4 = Telemann TWV 40:19

List of music features
note_density = number of notes per second
IOI_entropy = entropy of IOI duration values
IOI_mode = most frequent IOI duration value
spectral_centroid = centroid of the MEL spectrum
spectral_entropy = Shannon entropy across 32 MEL spectrum bands 
zero_crossing_rate = times the waveform crosses the zero axis
harmonic_complexity = complexity of the harmonic structure
melodic_complexity = complexity of the melodic structure
rhythmic_complexity = complexity of the rhythmic structure