This summer’s line-up and its heavy rap and R&B flavour are not surprising, it’s quite the opposite. Three out of five of the world’s most streamed artists last year on Spotify were categorized as hip-hop or R&B; Kendrick Lamar, Drake and The Weeknd.

Compared to most forms of modern rock, hip-hop is still in its infantile stages - continuously splintering and sprawling outwards - with untitled corporeal sub-genres born every other month in the murky depths of Soundcloud. A new-wave of trap and Soundcloud rappers are being heralded as the new punk, though, rock purists are likely to disagree. Their unfiltered, blithe approach to music is analogous to the early beginnings of punk-rock, a new generation of rap-stars with no affiliation to rap’s founding fathers, their lyrics or their sounds. As a matter of fact, they’re often apathetic and distance themselves from the culture.

What Longitude has arrived with, however, is an approachable, chart-oriented gallery of modern pop-culture, where ticket-sales, youthful fandom and common-sense have commissioned the entire collection.

Trap music, if you’re unacquainted, is the gritty Atlanta take on gangsta-rap defined by heavy, snarling, and sometimes stuttering 808 kick-drums, complemented with stark piano keys or eerie synths. This enveloping sound is now ubiquitous, whether Kaiser Chief stans want to admit it or not. Three of trap’s bona-fide stars will take over Marley Park in July.

Headliner Solange is one of this oft-beleaguered generation’s most expansive artists, no longer reserved to simply being ‘Beyonce’s sister’, she has arguably out-scaled her famous sibling’s artistry. Her colossal, lung-puncturing live set stokes ethereal fire into her stunning album, 'A Seat at the Table'. It’s a seminal piece of work, and Swan Lake levels of mechanized choreography terraform her heavenly album for earthly consumption.

Travis Scott, who has transcended underground autotune-drenched ennui-trap for pop-rap balladry, is another of the weekend’s headliners, spearheading Saturday’s list of acts. An associate of Kanye West, the producer, rapper and autotune crooner is renowned for anarchic live performances.

Less animalistic and more socially conscious is Jermaine Cole. Just months after playing to a sold-out 3 Arena, J. Cole, as he’s better known, returns as the Friday headline act. One of mainstream rap’s most celebrated lyricists, he treads the line between the thoughtful and the didactic over traditional sounding and self-produced beatscapes.

One of the most attention-grabbing first-wave acts is Anderson Paak. Joined by his band, The Free Nationals, Paak & co will transport you to a myriad of different musical eras and moods; funk, neo-soul, buttery R&B and soul-inflected hip-hop. There’s feverish anticipation for his upcoming album and he’s shown to be a steadily improving as an artist, and luckily for Irish crowds, as a performer. This after all, is an artist who sold-out Dublin's Academy (a side gig when he was touring support to Bruno Mars) to perform only 3-songs during the summer, something ticket buyers knew upon purchasing.

Refreshingly, there is much greater gender representation in this year’s line-up, and Princess Nokia and Ibeyi may well be the weekend’s unmissable beneath-the-banner acts. Ibeyi construct boldy expressive and harmonious R&B from the outer-reaches of the soul, drawing from Afro-Cuban roots, their soulful, soothing jazzy soundscapes have enough modern electronic nuances to beguile.

Destiny Nicole Frasquieri, as she’s known to her parents, is a idiosyncratic New York based rapper whose '1992' mixtape was reissued last year on renowned indie-rock label Rough Trade as a full-length. What resulted was one of the most honest, geekily fantastic tapes of the year, pirouetting with ease from dusty, soul-sample ‘90’s beats to gleaming trap production, all the while rapping with a stirring self-confidence about mysticism, her local Bodega, and gender politics, specifically Tomboy where she repeatedly quips, “With my little titties and my fat belly”. Her riotous live-shows are well documented; don’t miss it.

Tyler, the Creator is Saturday’s must-see act. His latest album signalled a newfound maturity, emotionally rich and texturally beautiful, the de facto leader of the now-defunct blog-rap collective Odd Future found a new lease of life. A combination of heartfelt lyrics and warm synth-rap will shine, along with some of his older more deafening shock-value tracks, ones which earned him the attention from the British government in 2015.

Former Odd Future crew member Syd fronts The Internet, a talented group of multi-instrumentalists. Music writer Craig Jenkins referred to their last album’s sound as “tight, hooky hip-hop soul”, and its difficult to navigate their sound without understanding their hip-hop and soul fundamentals. They constitute the closest thing resembling a guitar-band over the weekend.