Probably not, we should focus more here tbh
So what happens when something doesn't fit into accepted 'symbolic conventions'?
Cythraul, I would like to ask your thoughts on absolute music and the idea of absolute music as a representational art. You can address this now, or you can wait until I ask you again after I've read this book by Peter Kivy which deals much with absolute music. It would probably be better for my sake if you would wait, because I'm still working through the issues here, but in the meantime I might suggest Kivy's Philosophies Of Arts for your reading, as so far it seems to me that he's trying to take the next logical step from Danto. I could be wrong, but that's the impression I'm left with at the early stages of the book.
I don't think absolute music exists.
That's a bit of a radical claim to make, don't you think? Namely since the status of absolute music as a fine art has been a seriously debated topic for quite a while. I'm guessing that you mean something a bit different regarding 'absolute' music then, something other than music simply devoid of interpretation and purely musical.
I very much agree with the four proponents you put together for metal. Sure there are exceptions, but it is a great starting point. I can't think of anything really specific to add. Would you like to run through my definitions publicly to edit them or something?
Black metal is a subgenre of metal typified by its usually raw or under-produced sound and Satanic/rebellious aesthetic, as well as simplistic guitar phrases and under-accentuated rhythmic dimensions which allow more power for the atmospheric, detached and wandering riffs. Vocals are often higher pitched than death metal (or, "screams" rather than death metal's "grunts", speaking in slang terms) and can sound detached or unnervingly direct.
The genre began in the early/mid-80s as an offshoot of the popular heavy metal style emerging in Britain during this time, with bands from this area utilizing powerful occult imagery and a rawer, stripped-down sound than was usual for typical bands of the times, but other factions of influential bands occurred sporadically in other countries of Europe, including Switzerland, where Hellhammer were concocting their own sinister combination of (what would come to be known as) black/doom/death/thrash metal, possibly one of the world's first "extreme metal" bands (a term for metal that is not overtly/intentionally melodic in a traditional sense). Over time, the influences culminated in Norway and the other Scandinavian countries where "black metal" would come into its own and develop a following greater than when it was in its embryonic stages. It was in Norway and Sweden, with bands the likes of Mayhem, Bathory and Burzum, where black metal originated its "northern", cold, isolated sounds which became a staple sound of the "second wave" which extended until around the mid-90s.
Modern black metal has diverged quite a bit from its original path. Some see this as evolution and others as regression or even a falling-out from black metal totally. The genre is very much a worldwide phenomenon currently, with prominent acts located in Germany, France, Poland, Russia and even the United States (much to the apparent dismay of many fans of the "original" black metal which was decidedly European). Sub-styles of black metal have very recently been designed around expanding the aesthetic of the genre into industrial, psychedelic, ambient or folk sectors of music.
Technical death metal is a style of death metal with particular focus on challenging, demanding songwriting and instrumental skill. Bands may utilize complex guitar riffs and solos, change time signatures liberally or otherwise defy the rules of "traditional" death metal. The bands remain firmly rooted in death metal due to their unbending devotion to rhythmic heaviness and conceptual darkness, while promoting the idea of "harmony in chaos" even further with their schizophrenic compositions.
An overarching style of death metal with a few separate sub-styles within it. Overall, though, the music can be defined wholly as death metal with the extremity factor turned up in multiple ways. Triggered blastbeats, grind(core) influences and chunky, fast riffing characterize a good number of bands playing brutal death metal, but there are some bands, as early as Suffocation and as purely as Devourment who emphasize "slam" riffs which are often featured in breakdowns. This type of riff is often noted as being almost purely rhythmic, syncopated with the drumming or general pattern of the song and muted for maximum heaviness. Bands playing brutal death metal are often known to write shorter songs, emphasizing how much damage can be done in a brief period of time, though some also write longer, complex songs with a multitude of different, often slow, breakdowns and compositional techniques.
The three main styles seem to be a technical death style with slam-sounding breakdowns and grinding riffs as the aforementioned Suffocation did on their earliest material, a more purely rhythmic style such as the also previously mentioned Devourment or a complex, chaotic and constantly shifting yet unwaveringly fast and oppressive style like Deeds of Flesh. Most bands play in one of these styles or combine two or even all three with their own variegated influences to produce their own sound.
Interestingly, a few areas of the world have cultured bands who play brutal death metal who sound mainly similar. Examples would be the Colombian scene, featuring bands with heavy grooves and sometimes even epic riffs and harmonies, but who ultimately have weak or ineffectual vocal sounds, or the ever-popular Texas sound characterized by supremely guttural vocals and simplistic slam riffs often belying the true, complex nature of the sounds.
AIC are grunge rock with acoustic and blues influences, but they don't fit into any of metal's subgenres so that's that.