hip hop instrumental
hip hop production
hip hop beats

Although hip hop’s original music consisted solely of the DJ’s breakbeats and other vinyl record pieces, the advent of the drum machine allowed hip hop musicians to develop partially original scores. Drum set sounds could be played either over the music from vinyl records or by themselves. The importance of quality drum sequences became the most important focus of hip hop musicians because these rhythms (beats) were the most danceable part. Consequently, drum machines were equipped to produce strong kick sounds with powerful (sine) bass behind them. This helped emulate the very well-engineered drum solos on old funk, soul and rock albums from the late 1960s and early to mid 1970s. Drum machines had a limited array of predetermined sounds, including hi-hats, snares, toms, and kick drums.

The introduction of the digital sampler changed the way hip hop was produced. A sampler can digitally record and save small sound clips from any output device, such as a turntable. Producers were able to sample their own drum sounds from the records they grew up listening to. Perhaps more importantly, they could sample horns, upright basses, guitars and pianos to play along with their drums. Hip hop had finally gathered its complete band.

What many fail to recognize is the distinct importance of the gritty, choppy sound of hip hop. The music seldom sounds like other organic forms. Even hip hop crews that have their own band often use samples and the gritty, choppy texture of machines to create their beats in the studio as featured on their album (when performing live, they usually recreate this sound with a full band). One popular misconception is that samples and drum machines exist in hip hop music as merely a lazy substitute for a real band ; in fact, hip hop producers obsess over the timbre, texture and frequency of specific samples and drum machine sounds. A session drummer playing James Brown’s Funky Drummer break is no substitute for the sampled break from the original record. However, in recent years there has been a tendency towards original instrumental compositions in hip hop from the likes of Outkast, The Roots and The Neptunes.

Rhythmic structure
Beats (though not necessarily raps) in hip hop are almost always in 4/4 time signature. At its rhythmic core, hip hop swings : instead of a straight 4/4 count (pop music ; rock ’n’ roll ; etc.), hip hop is based on a triplet feel somewhat similar to the "swing" emphasis found in jazz beats. Hip hop takes this concept a step further, however. Whereas jazz swing implies three eighth notes (a triplet) per beat, hip hop implies six sixteenth notes (a "double triplet") per beat. Like the triplet emphasis in swing, hip hop’s double triplet "bubble" is subtle, rarely written as it sounds (4/4 basic ; the drummer adds the hip hop interpretation) and is often played in an almost "late" or laid back way.

Here’s a basic hip hop drum set example —one bar that would be repeated indefinitely. Note that no single instrument plays all of the implied double triplets. This is usually the case. In this example, the bass drum plays part of the double triplet subdivision. The bass drum pattern is most often the part that provides the hip hop feel.

This style was innovated predominantly in soul and funk music, where beats and thematic music were repeated for the duration of tracks. In the 1960s and 1970s, James Brown (known as The Godfather of Soul) talked, sung, and screamed much as MCs do today. This musical style provides the perfect platform for MCs to rhyme. Hip hop music generally caters to the MC for this reason, amplifying the importance of lyrical and delivering prowess.

Instrumental hip hop is perhaps the lone exception to this rule. In this hip hop subgenre, DJs and producers are free to experiment with creating instrumental tracks. While they may mix in sampled rap vocals, they are not bound by the need to cater to an MC.
source : Wikipedia.

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