5 Answers

Everything.  I know absolutely everything.  
Every band, every songwriter, all the lyrics to everything.  I know the names of all the band members, past, present, and, yes, even future.  I know the years in which songs were recorded, original artist and subsequent recordings.  I know the names of every album ever produced by anybody, the year, and can name every song on each album.  
And so do you. 

I've never heard of this band until I looked them up.See here for information >>> http://en.wikipedia.org/wiki/Suicide_silence

…as in stalactite chimes in Carlsbad Caverns? …or the “plunk" sound of a rock falling into water? 

Rock On! I know it all too.

I know that it exists and that there are some great rock bands and some no so great rock bands. There is good rock music and lousy rock music. What is it that you want to know about rock music?