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4 December 2014 to 29 September 2014
Spotify just published the super-cool #YearInMusic thing, which shows a variety of statistical excerpts and summaries of both Spotify global listening and (if you're a Premium subscriber) your own for 2014.  

Among other things, the global feature includes an editorial citation (which I had nothing to do with picking) for 2014's "Breakout Genre", Metropopolis.  

You might not have heard of Metropopolis. A few people who also hadn't heard of it wrote indignant articles about this fact:  

- Here Is Spotify's List of the Most Streamed Music of 2014, or What the Fuck Is Metropopolis? (from Noisey/Vice)
- Stop trying to make "metropopolis" happen: How Spotify forged a dubious new musical genre (from Salon)  

Conversely, hundreds of people who hadn't heard of it either have now subscribed to the playlist that demonstrates what it means.  

It doesn't actually much matter what it's called, I think. It's not a breakout genre name, it's a set of music that was breaking out in 2014. If you don't know what the name means, click the link and listen to it, and then you'll know. I don't care if it "happens", I care that you find more music you might love, and this might be some of it.  

But it does also have a name, and I happen to know the story of how there came to be a thing with this name.  
 
 

One of the things I watch over at work is the Echo Nest / Spotify list of genres. A genre can be any of many kinds of things, and can be varying degrees of known or unknown. In practical terms, "genre" for us kind of just means "thematic listening cluster", and our goal as we have expanded the list is to find and name and track as many such thematic listening clusters as we can identify in the world.  

In most cases, these clusters exist in the world with a name. "Album rock" is a thing. "Samba" and "Nintendocore" and "Sega" are things (and Sega has nothing to do with Nintendocore!). We can model and track these, and make playlists to express them, but we don't have to name them.  

But not all the clusters we find come with already-culturally-established names. What do you call the emerging cluster of loosely r&b-derived, often synthpop-orchestrated, generally sensual music that people like Frank Ocean and How to Dress Well are making? Various music-critics have suggested "pbr&b", "hipster r&b" and "r-neg-b", but most people who like the kind of music we're talking about don't know those terms. We originally named this cluster "r-neg-b", because of those three that was the one with the lowest amount of smug derision. But people kept accusing us of making that up, so we recently switched to calling it "indie r&b", on the theory that the music is kind of a cross between indie pop/rock/folk and r&b, and at least maybe you can guess what "indie r&b" might mean, whereas "r-neg-b" reads like a character-encoding error.  

Or sometimes multiple clusters come with the same name. When you say "trap", for example, do you mean trap or trap? One is a hip-hop subgenre, the other is a largely-instrumental electronic subgenre. For our list, then, we have opted to eliminate the ambiguity by calling the hip-hop one "trap music" and the electronic one "trapstep". There's nothing magically right about those names, but they are at least different from each other.  

And then, sometimes, because at Spotify we have maybe more data about human music-listening patterns than has ever existed before, we find clusters that you otherwise probably wouldn't be able to isolate, and thus wouldn't even have thought to name. For example, you know those rousing neo-rustic folk/pop-ish artists like Mumford & Sons and the Lumineers that kind of sound like Dave Matthews ran over a jug band? We have the data to make a listening cluster around those with hundreds of other someway-similar bands. If you like that kind of music, you'll probably enjoy listening to this cluster. But it doesn't come with a name, exactly. So we called it "stomp and holler". We didn't totally make up that term, but it wasn't a genre name before we said so.  

And you could argue that it still isn't a genre name, really, after we said so. This is fine. We don't have a philosophical or taxonomical agenda, we just have these clusters of awesome (usually) (to somebody) music, and we need some words to use as labels on a map, or as titles on playlists. When I have to make up names, I try to do so using the absolute minimum amount of creativity necessary to produce a unique new phrase, and thus we get a lot of rather mundane coinages like Malaysian pop and traditional reggae and atmospheric black metal. Sometimes I resolve name-ambiguity by the innovative linguistic wizardry of adding the words "more" or "deep", and thus we get a series of methodical techno clusters called deep house, deeper house and more deeper house. On the one hand, these are dopey names. On the other hand, if you like that kind of music, I'm betting that, in the same way that I continue to listen to BUMP OF CHICKEN, you'll still like listening to it long after you get over the name. (Or embrace it.)  

Every once in a while, though, I lack the imagination to think of a boring name, and am thus forced to settle for a creative one. This is how the cluster of theatrical melodic metal with mostly operatic female vocals came to be called fallen angel. This is how the cluster of music that can sometimes sound like people singing distractedly while dissolving parchment sheet-music in beakers of gurgling solvent came to be called laboratorio. This is how the cluster of music that used to be New Wave only we're still listening to it now that it's old came to be called permanent wave. This is how we came to have shimmer pop and shiver pop and soul flow. I'd pick duller names if I could, but the names just exist to get you to the music.  

The music, in all cases, is actually picked by computer programs using math to distill massive quantities of data. No matter what label I apply, these clusters exist because the world of people who make, listen to and write about music has collaboratively brought them into being by playing and listening and writing in particular combinations of patterns. In most cases, the computer programs use all this data to do two things: first they try to pick a set of cluster-appropriate artists, and then they try to pick those artists' most cluster-appropriate songs.  

This often works, but not always. Take, for example, piano rock. The numbers we calculate to characterize songs don't identify individual instruments, so if you let the computers pick artists that fit the "piano rock" mold, you get a bunch of rock with pianos, but also a bunch of similar rock by bands that don't actually ever use pianos. We could have let this happen, and renamed the cluster "post-maudlin rock", but in the spirit of avoiding smug derision, we instead went through the artist-list by hand and made it deliver, at least roughly, on the promise of "piano rock".  

And this is how we got metropopolis, too. I was listening, at one point, to a lot of indietronica, but when the computers made their indietronica playlist, I found that about half of it sounded like Chairlift and Chvrches to me, but half of it didn't. Which wasn't a problem, because "indietronica" doesn't have to sound like Chairlift and Chvrches, it just has to sound indie and tronic. But I wanted the cluster that did sound like Chairlift and Chvrches. So I made it. I had some other candidate names that I have since forgotten, but "metropopolis" seemed obviously better than the others as soon as it occurred to me, some kind of shiny aesthetic futurism with an insidious dystopian undertone.  

I watch over this cluster myself. The computers are actually pretty good at suggesting potential additions, but I take the time to go through and listen to each one, and only put them into the cluster if they sound sufficiently metropopolistic. This is, from my point of view, an admission of temporary defeat. The computers ought to be able to do this by themselves. If we had a few more dimensions of audio analysis, quantifying just a few more psychoacoustic attributes, maybe we could isolate the precise buoyant glitteriness I hear, or the kind of resigned muting of energy that distinguishes some of the data candidates I reject. I don't, ultimately, think this cluster is any different from liquid funk or doo wop. It's a thing, I can hear it. The computers can't hear it yet. And I wanted to listen to it more than I wanted to wait for them to learn.
To heroically understate the situation, I am not personally a fan of Christmas music.  

But it's my job to help you enjoy the music you enjoy, not the music I enjoy. If you are one of the many, many people who enjoy Christmas music, this is your time of year, and to help you enjoy your time of year in the specific manner you enjoy most, the genre system I work on at Spotify actually has several subvariations of Christmas music:  

Every Noise at Once - xmas genres  

But according to our data, this is still just the surface of the seasonal alternate-reality. With a sufficiently jolly bias for inclusion and a merry tolerance of error we can find at least one maybe-genre-related maybe-xmas song for more than 1200 of our 1300+ genres. And, in fact, we can not only attempt to make xmas playlists for all genres, but we can then even rank the genres by how xmas-related they are, which is interesting information for both people who want to find xmas music and people who want to avoid it.  

Every Noise at Once - all genres sorted by xmasness  

But this sorting and filtering is all stuff I do normally, for my own purposes. If there is to be a non-denominational Xmas cleanly separable from the religious Christmas, it should probably revolve around the spirits of generosity and giving, which call for gestures that you don't merely do for yourself.  

And so, in what I hope is this spirit, I have also made you this gift:  

 

This is an algorithmically-generated xmas-specific manipulation of my genre map. It is the ultimate ornament, I think, a symbol-mosaic composited out of unsilent nights. I didn't draw the tree, I manipulated math so that the tree would self-organize that way. (Drawing it would have been faster.) Math doesn't believe or disbelieve, but it can multiply anybody's joy.
I've been recording songs, however ineptly and infrequently, for a long time. Most of them have been on this site for hypothetical downloading (here). I don't sell them. If you take time out of your life to listen to them, that seems like a fair exchange to me.  

They're now also on Spotify, so that you can not only listen to them, but even intermingle them with real music in playlists.  

I've always just put my own name on them, but there are a bunch of people who share my name, and one of them already has an album that isn't mine on Spotify. So I've hereby and retroactively adopted the band-name Aedliga. This is pronounced "AID-li-guh", and has no meaning. It was also the name of one of my songs a few years ago, in which context it also meant nothing, but was the title track for that notional EP, so that there is now "Aedliga" by Aedliga on Aedliga. And there's aedliga.com and @aedliga, and furia.com/isthisbandnametaken now dutifully reports that the name is taken.  

I'll let you know when the T-shirts are ready.
I make a very sidebarred appearance in the November 2014 Harper's Magazine Readings section (page 21), where they list some of the genres that amused them in my genre map. The choices seem a little random to me (why is "Yugoslav rock" funny?), and I can't explain why they felt "Viking" had to be capitalized, but it's cool to appear in a magazine I actually used to read.
I had limited expectations for applying the logic from The Sounds of Places, which is based on whole countries, to individual cities. Cities are smaller than countries, and data-wise, smaller usually means more random.  

And maybe there is more randomness, overall, but there's enough non-randomness to be intriguing. Or, to put this another way, any chance that I wouldn't publish this evaporated when The Sound of Dundee turned out to, in fact, include the immortal "The Unicorn Invasion of Dundee" by Gloryhammer.  

The Sounds of US Cities
The Sounds of European Cities
At work I've been looking at the distinctive collective music listening of individual US cities. A lot of this, as you might imagine, turns out to be local music from in or near each city, or pop music with some sort of regional connection.  

But statistically, the most popular "national" hits tend to get mixed in with the local stuff at some point, through sheer ubiquity. Taylor Swift's "Shake It Off" is the most obvious example of this at the moment, a song so popular that it's basically representative of the distinctive listening of humans, or at least of American humans who use Spotify.  

For amusement, though, here is a ranking of major US Cities by where on their most-distinctive current song chart "Shake It Off" ranks as of today. The cities at the top are the ones who have surrendered most unreservedly to "Shake It Off", either through genuine disproportionate enthusiasm, and/or because they just don't have anything better of their own to play. The ones at the bottom have maintained the strongest resistance to this invasion. The >100s at the very bottom show the cities where immunity is so strong that "Shake It Off" doesn't even make the top 100 most-distinctive songs.  

# City
1 Arlington VA
1 Chandler
1 Gilbert
1 Mesa
2 Akron
2 Albany
2 Anchorage
2 Cleveland
2 New Haven
2 Pasadena
2 Tucson
2 Worcester
3 Alexandria
3 Des Moines
3 Orange
3 Scottsdale
3 Vancouver
3 Wilmington DE
4 Hoboken
4 Plano
4 Pompano Beach
5 Gainesville
5 Hartford
5 Somerville
5 Syracuse
5 Tacoma
5 Wichita
6 Bellevue
6 Providence
6 Reno
6 State College
7 Colorado Springs
7 Santa Clara
8 Aurora
8 Little Rock
9 Littleton
9 Tempe
10 East Lansing
10 Tampa
10 Trenton
10 Virginia Beach
11 Irvine
11 Sunnyvale
12 Albuquerque
12 Chicago
13 Boise
13 Boston
13 Cambridge
13 Las Vegas
13 Philadelphia
13 Silver Spring
13 Spokane
14 Dayton
14 Jacksonville
14 Miami Beach
14 Overland Park
15 Durham
15 Eugene
15 Lexington
15 St. Louis
16 Raleigh
16 Washington DC
17 Boca Raton
17 Springfield MO
18 Greensboro
18 Greenville
18 Spring
19 Cincinnati
19 Hyattsville
19 Murfreesboro
20 Fremont
20 Fresno
20 Ithaca
20 Tallahassee
21 Bloomington
21 Indianapolis
21 Pittsburgh
23 Corona
23 Phoenix
24 Frisco
25 Columbia MO
26 Ann Arbor
26 Denton
26 San Luis Obispo
26 West Palm Beach
27 Grand Rapids
27 Madison
27 Norman
28 Norfolk
29 Jersey City
29 Orlando
29 San Jose
30 Lawrence
30 Louisville
31 Bakersfield
31 Omaha
32 New York
32 Richmond
33 Salt Lake City
34 Columbus
34 Lewisville
34 Oklahoma City
35 Milwaukee
36 Wilmington NC
37 Columbia SC
37 Santa Barbara
38 San Diego
39 Charleston
40 Lincoln
40 Toledo
41 Long Beach
41 Riverside
41 St. Paul
42 Urbana
43 Berkeley
44 Katy
44 Minneapolis
45 Buffalo
46 Stockton
47 El Paso
49 Fort Collins
54 Charlotte
55 Chapel Hill
55 Kansas City
55 Knoxville
55 Tulsa
56 New Orleans
57 Denver
58 Farmington
60 Concord
60 San Antonio
64 Baton Rouge
67 Birmingham
68 Hayward
73 Mountain View
81 Whittier
83 Seattle
85 Humble
86 Atlanta
86 Santa Monica
87 Grand Prairie
92 Memphis
>100 APO
>100 Anaheim
>100 Arlington TX
>100 Athens
>100 Austin
>100 Baltimore
>100 Boulder
>100 The Bronx
>100 Brooklyn
>100 College Station
>100 Dallas
>100 Detroit
>100 Fort Lauderdale
>100 Fort Worth
>100 Hialeah
>100 Hollywood FL
>100 Honolulu
>100 Houston
>100 Irving
>100 Los Angeles
>100 Lubbock
>100 Mesquite
>100 Miami
>100 Nashville
>100 Newark
>100 Oakland
>100 Portland OR
>100 Provo
>100 Rochester
>100 Sacramento
>100 San Francisco
>100 Santa Ana
 

Presumably none of this will bother Taylor, but "people who are not going to listen disproportionately are going to not listen disproportionately" wouldn't fit the meter of the song very well, so I assume that's why she didn't mention it.
For another way to look at the data from my examination of the distinctive music-listening of US cities, I ranked the top 10 cities by distinctive affiliation to some major genres.  
 

acoustic pop  

1Spokane
2Knoxville
3Grand Rapids
4St. Paul
5Norman
6Birmingham
7Nashville
8Austin
9Madison
10Athens
 

alternative country  

1Nashville
2Louisville
3Raleigh
4Frisco
5Charleston
6Fort Worth
7Birmingham
8College Station
9Grand Prairie
10Greenville
 

alternative dance  

1San Francisco
2Santa Monica
3Tucson
4New York
5Tempe
6Pasadena
7San Diego
8Gainesville
9Chicago
10San Luis Obispo
 

bachata  

1Newark
2The Bronx
3Jersey City
4Miami
5Hollywood FL
6Brooklyn
7Fort Lauderdale
8Hialeah
9West Palm Beach
10Tampa
 

banda  

1Mountain View
2Mesquite
3Irving
4Newark
5Concord
6Oakland
7Santa Ana
8Anaheim
9Bakersfield
10Los Angeles
 

ccm  

1Springfield MO
2Grand Rapids
3Oklahoma City
4Spokane
5Birmingham
6Tulsa
7St. Paul
8Colorado Springs
9Knoxville
10Norman
 

chillwave  

1San Francisco
2Santa Monica
3Portland OR
4Seattle
5Brooklyn
6New York
7Pasadena
8New Orleans
9Berkeley
10San Diego
 

contemporary country  

1Des Moines
2Lincoln
3Omaha
4Indianapolis
5Columbia MO
6Akron
7APO
8Dayton
9Lexington
10Albuquerque
 

country  

1APO
2Indianapolis
3Akron
4Albuquerque
5Des Moines
6Omaha
7Columbia MO
8Lincoln
9San Antonio
10Dayton
 

crunk  

1Humble
2Katy
3Houston
4Charlotte
5Orlando
6Baton Rouge
7Farmington
8Memphis
9Irving
10Tampa
 

dance pop  

1Baltimore
2Greensboro
3Detroit
4Las Vegas
5Philadelphia
6Gilbert
7Pompano Beach
8Trenton
9Wilmington DE
10Atlanta
 

dirty south rap  

1Humble
2Katy
3Houston
4Charlotte
5Atlanta
6Irving
7Orlando
8Farmington
9Memphis
10Arlington TX
 

duranguense  

1Mesquite
2Irving
3Mountain View
4Arlington TX
5Dallas
6Newark
7Jersey City
8Concord
9Houston
10Oakland
 

edm  

1Irvine
2Hoboken
3San Jose
4Fremont
5Santa Clara
6Berkeley
7State College
8Reno
9Sunnyvale
10Bellevue
 

electro house  

1Hoboken
2Irvine
3San Jose
4Fremont
5Santa Clara
6Berkeley
7New York
8State College
9Boston
10Sunnyvale
 

folk  

1Nashville
2Charleston
3Louisville
4Raleigh
5Portland OR
6Chapel Hill
7Birmingham
8Greenville
9Knoxville
10Wilmington NC
 

freak folk  

1Portland OR
2Brooklyn
3Seattle
4Cambridge
5San Francisco
6Somerville
7Santa Monica
8Athens
9Austin
10Denton
 

g funk  

1Hayward
2Concord
3Oakland
4Sacramento
5Stockton
6San Jose
7Fresno
8Fremont
9Los Angeles
10Whittier
 

hip hop  

1Hartford
2Silver Spring
3Worcester
4Ann Arbor
5Farmington
6Philadelphia
7Wilmington DE
8Tampa
9Boca Raton
10Hyattsville
 

house  

1Hoboken
2Irvine
3San Jose
4Fremont
5Santa Clara
6Berkeley
7State College
8Sunnyvale
9Reno
10Orange
 

hurban  

1Miami
2Hollywood FL
3Hialeah
4Fort Lauderdale
5Newark
6West Palm Beach
7Jersey City
8The Bronx
9El Paso
10Miami Beach
 

hyphy  

1Concord
2Hayward
3Sacramento
4Stockton
5Oakland
6Fresno
7San Jose
8Fremont
9Santa Clara
10San Francisco
 

indie folk  

1Portland OR
2Somerville
3Cambridge
4Madison
5Eugene
6Spokane
7Louisville
8Milwaukee
9New Haven
10Durham
 

indie pop  

1Portland OR
2Somerville
3Austin
4Cambridge
5Chicago
6New Orleans
7Seattle
8Eugene
9Lawrence
10Milwaukee
 

indie rock  

1Portland OR
2Chicago
3Cambridge
4Somerville
5Seattle
6Austin
7Columbus
8Tempe
9San Diego
10St. Louis
 

indietronica  

1Santa Monica
2San Francisco
3Portland OR
4Seattle
5New York
6San Diego
7Bellevue
8Pasadena
9Anchorage
10Brooklyn
 

jam band  

1Boulder
2Athens
3Denver
4Fort Collins
5Charleston
6Birmingham
7Columbia SC
8Baton Rouge
9New Orleans
10Wilmington NC
 

jerk  

1Stockton
2Hayward
3Sacramento
4Oakland
5Concord
6Fremont
7Corona
8San Jose
9Bakersfield
10Phoenix
 

latin  

1El Paso
2Miami
3Hialeah
4Miami Beach
5Hollywood FL
6Fort Lauderdale
7Boca Raton
8West Palm Beach
9Mesquite
10Jersey City
 

lo-fi  

1Portland OR
2Austin
3Seattle
4Cambridge
5Chicago
6Somerville
7Brooklyn
8Santa Monica
9Cincinnati
10Louisville
 

mariachi  

1Mountain View
2Newark
3Mesquite
4Irving
5Concord
6Jersey City
7Oakland
8Santa Ana
9El Paso
10Dallas
 

norteno  

1Mountain View
2Mesquite
3Irving
4Newark
5Concord
6Oakland
7Santa Ana
8Anaheim
9Bakersfield
10Houston
 

nu gaze  

1Portland OR
2Brooklyn
3Santa Monica
4Seattle
5San Francisco
6San Diego
7Pasadena
8Lawrence
9New Orleans
10New York
 

outlaw country  

1Fort Worth
2Grand Prairie
3Frisco
4College Station
5Lewisville
6Lubbock
7Spring
8Dallas
9San Antonio
10Arlington TX
 

pop  

1Gilbert
2Pompano Beach
3Chandler
4Trenton
5Las Vegas
6Plano
7Santa Clara
8Anchorage
9Vancouver
10Fresno
 

pop punk  

1Mesa
2Virginia Beach
3Trenton
4Chandler
5Buffalo
6Gilbert
7Pittsburgh
8Tucson
9Colorado Springs
10East Lansing
 

progressive bluegrass  

1Denver
2Boulder
3Fort Collins
4Raleigh
5Charleston
6Knoxville
7Chapel Hill
8Greenville
9Louisville
10Nashville
 

r&b  

1Baltimore
2Detroit
3Atlanta
4Greensboro
5Memphis
6Philadelphia
7Hyattsville
8Richmond
9Norfolk
10Las Vegas
 

r-neg-b  

1San Francisco
2Santa Monica
3New York
4Brooklyn
5Providence
6Seattle
7Pasadena
8Portland OR
9Baltimore
10Hyattsville
 

ranchera  

1Mountain View
2Newark
3Mesquite
4Irving
5Concord
6Jersey City
7Oakland
8Santa Ana
9Dallas
10Los Angeles
 

reggaeton  

1Hialeah
2Miami
3Hollywood FL
4Fort Lauderdale
5West Palm Beach
6Orlando
7Boca Raton
8Miami Beach
9Tampa
10Jersey City
 

shimmer pop  

1St. Louis
2Santa Monica
3Lawrence
4San Francisco
5Kansas City
6Overland Park
7Littleton
8Colorado Springs
9Aurora
10Bellevue
 

stomp and holler  

1Portland OR
2Somerville
3Louisville
4Minneapolis
5Wilmington NC
6Cambridge
7Eugene
8Madison
9Milwaukee
10Spokane
 

synthpop  

1San Francisco
2Santa Monica
3New York
4Tucson
5Pasadena
6San Diego
7Tempe
8Bellevue
9Chicago
10Gainesville
 

trap music  

1Charlotte
2Memphis
3Humble
4Richmond
5Farmington
6Silver Spring
7Orlando
8Toledo
9Baton Rouge
10Katy
 

west coast rap  

1Hayward
2Concord
3Sacramento
4Oakland
5Stockton
6San Jose
7Fresno
8Fremont
9Los Angeles
10Whittier
 

worship  

1Springfield MO
2Grand Rapids
3Spokane
4Tulsa
5Birmingham
6St. Paul
7Oklahoma City
8Greenville
9Knoxville
10Murfreesboro
 
 

This might also be the preface for a volume of sociology essays.
Every Noise at Once has long existed in shades of gray. This isn't because I don't like colors. I've actually tried a few different ways to add color, mostly through inelegant expedients, but none of them seemed to me to be adding more clarity than confusion.  

I'm not entirely certain this one doesn't also suffer that flaw, but in the spirit of experimentation, I'm going to go ahead and publish it. If it makes us unhappy, I can always go back to gray. So here:  


The idea is to semi-subliminally surface some of the other analytical dimensions from the underlying music space, beyond the two that drive the XY axes, so that there's a little less visual flattening.  

For example, in the section on the right, above, you can see the reddish color running from "garage punk blues" to "experimental rock" to "more classic garage rock" and "psychedelic blues-rock", and the light blue linking "alternative new age" to "abstract" to "new tribe". These are good associative threads.  

And the maps within each genre (psychedelic blues-rock on the left, below, and abstract on the right) show both overall corresponding tints, and variable degrees of internal uniformity:  


Logistically, this works by mapping three additional acoustic metrics into the red, green and blue color-channels. I arrived at this particular combination through not-at-all-exhaustive experimentation, so maybe I'll come up with a better one, but for the moment red is energy, green is dynamic variation, and blue is instrumentalness. I don't recommend trying to think too hard about this, as the combinatory effects are kind of hard to parse, but it gives your eye things to follow. As data-presentation this is rather undisciplined, but as computational evocation it seems potentially interesting nonetheless.  

Which you could say of music, too.
As part of a conference on Music and Genre at McGill University in Montreal, over this past weekend, I served as the non-academic curiosity at the center of a round-table discussion about the nature of musical genres, and of the natures of efforts to understand genres, and of the natures of efforts to understand the efforts to understand genres. Plus or minus one or two levels of abstraction, I forget exactly.  

My "talk" to open this conversation was not strictly scripted to begin with, and I ended up rewriting my oblique speaking notes more or less over from scratch as the day was going on, anyway. One section, which I added as I listened to other people talk about the kinds of distinctions that "genres" represent, attempted to list some of the kinds of genres I have in my deliberately multi-definitional genre map. There ended up being so many of these that I mentioned only a selection of them during the talk. So here, for extended (potential) amusement, is the whole list I had on my screen:  
 

Kinds of Genres
(And note that this isn't even one kind of kind of genre...)  

- conventional genre (jazz, reggae)
- subgenre (calypso, sega, samba, barbershop)
- region (malaysian pop, lithumania)
- language (rock en espanol, hip hop tuga, telugu, malayalam)
- historical distance (vintage swing, traditional country)
- scene (slc indie, canterbury scene, juggalo, usbm)
- faction (east coast hip hop, west coast rap)
- aesthetic (ninja, complextro, funeral doom)
- politics (riot grrrl, vegan straight edge, unblack metal)
- aspirational identity (viking metal, gangster rap, skinhead oi, twee pop)
- retrospective clarity (protopunk, classic peruvian pop, emo punk)
- jokes that stuck (crack rock steady, chamber pop, fourth world)
- influence (britpop, italo disco, japanoise)
- micro-feud (dubstep, brostep, filthstep, trapstep)
- technology (c64, harp)
- totem (digeridu, new tribe, throat singing, metal guitar)
- isolationism (faeroese pop, lds, wrock)
- editorial precedent (c86, zolo, illbient)
- utility (meditation, chill-out, workout, belly dance)
- cultural (christmas, children's music, judaica)
- occasional (discofox, qawaali, disco polo)
- implicit politics (chalga, nsbm, dangdut)
- commerce (coverchill, guidance)
- assumed listening perspective (beatdown, worship, comic)
- private community (orgcore, ectofolk)
- dominant features (hip hop, metal, reggaeton)
- period (early music, ska revival)
- perspective of provenance (classical (composers), orchestral (performers))
- emergent self-identity (skweee, progressive rock)
- external label (moombahton, laboratorio, fallen angel)
- gender (boy band, girl group)
- distribution (viral pop, idol, commons, anime score, show tunes)
- cultural institution (tin pan alley, brill building pop, nashville sound)
- mechanism (mashup, hauntology, vaporwave)
- radio format (album rock, quiet storm, hurban)
- multiple dimensions (german ccm, hindustani classical)
- marketing (world music, lounge, modern classical, new age)
- performer demographics (military band, british brass band)
- arrangement (jazz trio, jug band, wind ensemble)
- competing terminology (hip hop, rap; mpb, brazilian pop music)
- intentions (tribute, fake)
- introspective fractality (riddim, deep house, chaotic black metal)
- opposition (alternative rock, r-neg-b, progressive bluegrass)
- otherness (noise, oratory, lowercase, abstract, outsider)
- parallel terminology (gothic symphonic metal, gothic americana, gothic post-punk; garage rock, uk garage)
- non-self-explanatory (fingerstyle, footwork, futurepop, jungle)
- invented distinctions (shimmer pop, shiver pop; soul flow, flick hop)
- nostalgia (new wave, no wave, new jack swing, avant-garde, adult standards)
- defense (relaxative, neo mellow)  
 

That was at the beginning of the talk. At the end I had a different attempt at an amusement prepared, which was a short outline of my mental draft of the paper I would write about genre evolution, if I wrote papers. In a way this is also a way of listing kinds of kinds of things:  
 

The Every-Noise-at-Once Unified Theory of Musical Genre Evolution
  1. There is a status quo;
  2. Somebody becomes dissatisfied with it;
  3. Several somebodies find common ground in their various dissatisfactions;
  4. Somebody gives this common ground a name, and now we have Thing;
  5. The people who made thing before it was called Thing are now joined by people who know Thing as it is named, and have thus set out to make Thing deliberately, and now we have Thing and Modern Thing, or else Classic Thing and Thing, depending on whether it happened before or after we graduated from college;
  6. Eventually there's enough gravity around Thing for people to start trying to make Thing that doesn't get sucked into the rest of Thing, and thus we get Alternative Thing, which is the non-Thing thing that some people know about, and Deep Thing, which is the non-Thing thing that only the people who make Deep Thing know;
  7. By now we can retroactively identify Proto-Thing, which is the stuff before Thing that sounds kind of thingy to us now that we know Thing;
  8. Thing eventually gets reintegrated into the mainstream, and we get Pop Thing;
  9. Pop Thing tarnishes the whole affair for some people, who head off grumpily into Post Thing;
  10. But Post Thing is kind of dreary, and some people set out to restore the original sense of whatever it was, and we get Neo-Thing;
  11. Except Neo-Thing isn't quite the same as the original Thing, so we get Neo-Traditional Thing, for people who wish none of this ever happened except the original Thing;
  12. But Neo-Thing and Neo-Traditional Thing are both kind of precious, and some people who like Thing still also want to be rock stars, and so we get Nu Thing;
  13. And this is all kind of fractal, so you could search-and-replace Thing with Post Thing or Pop Thing or whatever, and after a couple iterations you can quickly end up with Post-Neo-Traditional Pop Post-Thing.
 

And it would be awesome.  
 
 
 
 

[Also, although I was the one glaringly anomalous non-academic at this academic conference, let posterity record the cover of the conference program.]  

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