And here’s the full song — contains much explicit language.

The hook samples the line “Biggie Smalls is the illest” from “The What” on the same album. It’s twenty-three seconds in.

Sampling is a severely underappreciated songwriting tool. Even if you have moral or legal issues with sampling from others, sampling from yourself is still a good idea. Biggie’s line about himself being the illest is just part of a verse in “The What.” The producer on “Unbelievable,” the great DJ Premier, was smart enough to recognize that Biggie’s line could stand on its own as a hook. DJ Premier also produced “Nas Is Like,” and built its chorus through similar means.

The word “Unbelievable” itself comes from R Kelly, sped up a little and raised in pitch to sound female. Listen at 0:58.

Sampled vocals aside, the chopped-up keyboard part is the most musically sophisticated aspect of the track. Its original source is “Remind Me” by Patrice Rushen — I’m pretty sure it comes from the end of the solo section around 4:10.

Premier chopped up this little keyboard phrase and resequenced it beyond recognition. The result is a hip angularity that a normal keyboard player would probably not have arrived at organically.

The beat in “Unbelievable” is an old standby, “Impeach The President.”

The string ambiance in the background comes from the very odd Quincy Jones song “Kitty With The Bent Frame.” Listen at 1:08.

Quincy’s record is a favorite for hip-hop producers looking for an uneasy mood.

Here’s a diagram showing the sample genealogy of “Unbelievable.”

The meaning of self-sampling

Like I said above, self-sampling is so interesting to me because it’s recursive, self-referential. Most of the music we like is full of self-reference, and generally, the more self-referential it is, the more structured and meaningful it feels. Even simple-seeming nursery rhymes can be recursive and self-similar. Here’s a visualization by Lee Byron showing self-similarity in the nursery rhyme “Hickory Dickory Dock.”

Self-similarity makes for compelling visual art, too. One reason we find nature attractive is its rich fractal self-similarity. Here’s a leaf I photographed in my neighborhood; notice how the same veiny structure repeats itself at different size scales:

Even very simple recursive mathematical equations can produce stunningly complex, biological-looking forms, like the classic fractal known as the Mandelbrot set.

Recursion isn’t just attractive. It’s fundamental to computer science — self-reference is a key programming technique. Recursion may be essential to the very nature of consciousness itself. Some neuroscientists think that your entire sense of self emerges out of recursive self-referential loops as your brain represents different parts of itself to itself.

No wonder recursive music is so fascinating. Keep on sampling yourselves, musicians; let’s see what other recursive truths we can uncover.

Nas has a great flow full of powerful imagery, but what truly sets this track apart for me is DJ Premier’s production. It’s a complex web of samples and scratches that tie together so seamlessly as to be much greater than the sum of their parts. A lot of the samples are from other songs by Nas himself. Here’s a diagram of all the samples, click to see it bigger:

Primo tells the story of the track, including the serendipitous discovery of the killer orchestral string sample, in The 14 Deadly Secrets by DJ Premier:

A transcript:

The day I made this record, I was at my house in Long Island, and I found this old record that I was gonna throw away. It was a ten inch record from a Lutheran church, and it was pink with a black fish on it. And I was gonna throw it in the garbage, ‘cuz it didn’t look like it had anything hot on it. But somethin’ told me “before you throw it away, put it on the turntable, see if you can find something on it.

And I found that sample of “Nas Is Like”, and I broke it into 3 parts, scratched it live to the drumbeat that I already had, with the little chirpin’ birds and from there, “Nas Is Like” was born, man…

The birds twittering during the intro beat are from “Why” by Don Robertson. And here’s the Lutheran record Primo’s talking about, “What Child Is This.” Very unlikely hip-hop source material.

Most of the lines in the chorus come from Nas’ breakout hit “It Ain’t Hard to Tell.” The “life or death” line is at 0:32, the “Nas is like” that gives the song its title is at 0:44, and the “half man half amazin’” comes in a few seconds later. “My poetry’s deep, I never fell” is at 2:41.

“It Ain’t Hard To Tell” includes some hot samples of its own, including the synth intro from “Human Nature” by Michael Jackson and a saxophone riff from the much-sampled “NT” by Kool & The Gang (listen at 3:12.)

The other source for the “Nas Is Like” chorus is Nas’ “Street Dreams” from 1996. Samples are at 3:16 (“I’m a rebel) and 3:18 (“no doubt.”)

This track is also a composite of different memes – it quotes “Sweet Dreams” by Eurythmics and samples its beat from “Never Gonna Stop” by Linda Clifford.

Maybe the most inventive sample in “Nas Is Like” is a single syllable from “Nobody Beats the Biz” by Biz Markie. It’s the line “highly recogNIZED as the king of disco-in’” at 2:06. Out of context, “NIZED” sounds like Biz is saying “Nas.” That might be the single most creative sample usage in hip-hop history.

No wonder DJ Premier loves Biz — both like using a lot samples and allusions. Biz’s chorus is a play on a commercial jingle that’ll be familiar to anyone from the NYC region who grew up in the eighties (or has watched Seinfeld.) Biz also samples the drums from by “Hihache” by the Lafayette Afro Rock Band, “Fly Like An Eagle” by Steve Miller and, to heighten the self-reference even more, one of his own classic tracks, “The Def Fresh Crew” with Roxanne Shanté.

To add yet another layer of reference, there’s a bit in here where Biz quotes the jingle for Meow Mix! Biz is so much bigger than copyright law.

Nas does a lot of bragging in his rhymes. I learned excessive self-deprecation as a virtue from both my Jewish and middle American Protestant sides, so swagger feels deliciously subversive for me. There’s nothing more balling than sampling yourself in your own songs. Any sample-based song carries a dense web of associations, and I love the complexity that gets introduced when people sample themselves, or when they sample tracks containing samples, or best of all, both. “Nas Is Like” has a complex family tree, a set of allusions to allusions to allusions. This is as it should be. Fundamentally, all music is built of reshuffled bits of other music. Hip-hop makes this fact an explicit part of the music’s message, and that’s the biggest reason why I love it.

Hear a mashup of “Nas Is Like” with “It Ain’t Hard To Tell,” “Human Nature” and “Right Here” by SWV.

Human Nature Megamix by ethanhein

DJ Kool Herc was one of the first DJs to remix tracks on the fly using turntables and a mixer. Rather than playing songs from beginning to end, Herc isolated and repeated the hooks and breaks. The break in a dance song is the section where all of the instruments drop out except the drums, percussion and maybe the bass. In disco and funk songs, the break is the energetic peak moment, when the dancers really get down. Herc discovered that by isolating and looping, say, the break from “Apache” by the Incredible Bongo Band, he could bring the dance floor to ecstatic new heights.

To loop a break, you need two copies of the same record, one on each turntable. While the break plays from the left turntable, you cue up the beginning of it on the right one. At the end of the break, you quickly crossfade to the right turntable. While the break plays from there, you cue up the first copy to the beginning of the break on the left turntable. In theory, you could loop a break like that indefinitely.

Along with Herc, the first generation of hip-hop DJs also included Afrika Bambaataa and Grandmaster Flash, whose dense vinyl collages prefigured the mashup movement. Hear the prehistory of the mashup in “The Adventures Of Grandmaster Flash On The Wheels Of Steel.”

It’s relatively easy to put a collage like this together on the computer, but it takes delicate timing and tons of practice to do it using vinyl.

Turntablism broke into mass consciousness when Grand Mixer DST appeared with Herbie Hancock on “Rockit” in 1983. The first turntablist I had a relationship with was Jam Master Jay, from his work with Run-DMC in tracks like “Peter Piper.” More recently I got hip to DJ Premier, who produced my favorite Nas track, “Nas Is Like.” Hear Primo on Gang Starr’s “DJ Premier in Deep Concentration.”

As jazz gave birth to technical and esoteric styles like bebop, so turntablism has its own highbrow virtuosos. DJ Rob Swift is a leadng member of the artsier school of turntablism. He’s more of an abstract improviser than a sequencer of recognizable hooks and grooves. Hear Rob Swift scratching a series of records, starting with the Funky Drummer bonus beat reprise.

Here, Rob Swift demonstrates a turntablist notation system (thanks Nick Seaver):

See more scratch notation, courtesy of Wayne Marshall.

Speaking of the Funky Drummer, see an amazing freestyle by Mos Def, Black Thought and Eminem over a DJ scratching the Bonus Beat reprise.

DJs have done most of their collaboration with emcees and electronica producers. They’ve been slower to work with traditional instrumentalists — there’s a lot of new musical vocabulary that has to be learned on both sides. It’s beginning to happen, though. In my hippie-ish youth I enjoyed going to see DJ Logic scratching it up with jam bands. And Youtube loves this video of a violinist getting down over a few different records, including the instrumental of “Check The Rhime” by A Tribe Called Quest.

Vinyl and the gear to play it are heavy, bulky and expensive. If I ever start DJing seriously, I’ll probably opt for vinyl emulation software. It doesn’t necessarily have the same touch as vinyl, but it would be pretty awesome to be able to scratch anything in my iTunes library.

Using a turntable, you can simulate unearthly speech sounds by rapidly scratching the record to and fro. The circle becomes complete when beatboxers emulate the sound of DJ scratching with their mouths. Enjoy Rahzel beatboxing a set of Wu-Tang songs.

Any more videos, links or other turntable-related goodness I’m missing? Hit me up in the comments.

Update: great blog post on classical musicians’ experiments with turntablism pre-1950.