摘要：Background in acoustics and psychoacoustics. There are a considerable number of
(ethno)musicological studies dealing with the acoustical measurement of musical scales. For
this investigation, the studies on vertical (harmonic) sonorities seem to be the most relevant,
especially those including microtonal measurements and their interpretations. On the one hand,
there is a general attitude that natural harmonic consonances are preferable (as ideal) in a
freely-retuned performance since beats are eliminated in this case. On the other hand,
preferences for rough sonorities (even for maximum roughness) are observed in some
traditional musics, particularly in vocal traditions (e.g., Brandl, 1989; Muszkalska, 2000, 2002;
Ambrazevičius, 2008).
