Questa è in effetti più una questione (pseudo?)filosofica che musicale, comunque... Vi riporto la mia opinione, che avevo scritto su quel forum (è in inglese): [...] at first I am tempted to reply...YES! Silence is music: as zero is a number, black is a colour, and the empty set is a set. Whatever you define music, if you define it via some "structure" requirement about sound, silence is just the simplest (or the emptiest) such a structure. And...silence can be written on a score, right? And you can play it (on whatever instrument), right? Well, so silence is music. The most universal music indeed. But...enlarging your definition of "structure" you can include more and more acoustic phenomena, like any kind of noise....So, what makes the difference between sound and music? I would say that, in this case, the difference is not inherent to the "structure" in itself, but rather to the way you look at the acoustic phenomenon: the willingness of giving intellectual attention to it. So, for example, the twitter of a bird, which indeed possesses a lot of well identifiable structure (melody, rhythm etc.), is not music if it just happens without anybody driving intellectual attention to it. On the other hand, a completely random noise is music if intellectual attention is given to it, even though it possesses no structure at all (or, rather, a very broad concept of structure). So...in conclusion? In conclusion, I would say that silence is music as far as you want to give artistic/aesthetic/intellectual attention to it.