about metasound logo: a pleyer keeps "pnefsikroustos" tubes (paper percussion tubes); hears the sound (waves on the left) and produces sound (waves on the right). Also, his head seems like an "O" and tubes like a greek "μ", the initials for "Metasound Group" (Ομάδα μεταήχων) in greek. All that produces emoticon: ))Ομ)) or ))Om)) (in greek fonts are missing)...