At the start of September, the fourth Outlook Festival takes place in a 19th-century fort on the Croatian coast. Already this festival has become a vital point in the calendar for those involved with dubstep, grime and other UK underground scenes – not only a jolly in the sun (“dubstep's Ibiza”), but the one time in the year when everyone involved takes a break from international touring and comes together in the same place, a time to compare notes and take stock of the progress.

It's always interesting to see how revolutions in music get folded back into the fabric of the culture that fomented them. Dubstep, which changed club culture so dramatically in the mid-2000s, is now an intrinsic part of that culture from mainstream to margins, and the forms it takes as it beds into these various parts of the ecosystem are manifold. And Jazzsteppa – two Israelis named Gal and their trombones – turn their hands to a fair few of those forms.

This is where the delirium kicks in. Tired but happy, the attendees started the third day of Sónar festival slightly boggled by how to pick and choose from the strange delights on offer. Saturday was when the true musical variety of the festival was displayed: straight-up hip hop to eye-popping South African tribal dance displays, balmy ambient revivalism to apocalyptic techno, heartbroken electronica to deranged prog rock: it was all on offer...

Certainly a good cross-section of people were in attendance for the first day of Sónar.

The house music of Chicago, led by producers and DJs, has long had a tendency to feature the greatest vocals of any genre yet not make stars of its singers. And for most of his working life, Darryl Pandy, who died yesterday aged 48, was not the star his huge presence and elemental, gospel-schooled voice warranted – instead working the club circuit and soul revival shows, and featuring on dance tracks scattered across dozens of 12" singles on many labels worldwide.

This month sees an audacious attempt to showcase British dancehall music, when the Cargo venue in Shoreditch hosts the multi-artist revue Showtime!. The Heatwave collective have brought together vocalists from various UK underground scenes, linked by a strong influence from the high-energy Jamaican sounds of the past 30 or so years. While many of the artists involved have found success in crossover scenes like rave, jungle, grime and garage, the appeal of dancehall itself (also known by the overlapping terms bashment and ragga) has traditionally been restricted to predominantly black audiences.

The Sónar festival occupies a very special place in the New Music calendar – and is this year expanding outwards temporally and geographically, with new franchises in Tokyo and A Coruña, Galicia. Now into its 17th year, the parent festival in Barcelona serves as a vital meeting point for those of all stripes who refuse to acknowledge the polarisation of avant-garde and populism, or of club culture and the mainstream music industry. With 10 or more main stages and untold off-piste club events around the city, it would be impossible to condense even a single day and night of Sónar Barcelona into a standard gig-venue show, but that's what A Taste of Sónar tried to do last night.

Googling for academic articles about Britney Spears is one rabbit hole I've managed to avoid falling down thus far, but one imagines there are reams of the things. From demonically driven Disney child star via pigtailed Lolita and sex-droid air hostess to shaven-headed loon lunging aggressively towards her public through the paparazzo's lens, she's provided no end of provocative and iconic images, and stirred up all kinds of problematic issues around post-feminism, celebrity and voyeurism, while remaining an odd non-presence at the centre of it all.