My String quartet Listening 002 : Schonberg - String Quartet n.2

I've got only one notice that this Schonberg's string quartet is moving by creating some mass of sound even there's a melody line in an original way (but not really like the use of sound in the contemporary classical compositions).
I think the principal melody doesn't really be remarkable. Always there's something happens but as if they were in the background like the orchestra in the operas. It seems to me that the whole part is equally important but the importance is absent, and the composer did it on purpose.
At the end, I found that a particular conception about the melody from Schoenberg would exist but I'm still discovering it and can't for now see what exactly it is.
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#string
#quartet
#Schonberg