Halsey is at her best when she diverts from the formula and gets personal. She’s at Wolf Trap on Sunday. (Rob Grabowski/Invision/AP)
Randomer

As Randomer, London’s Rohan Walder makes metal machine music for dance floor fiends. Since debuting a decade ago, the DJ-producer has consistently delivered rough-edge techno full of precisely programmed percussion, synth swooshes and gut-rumbling bass. His tracks don’t leave much time or room for listeners to overthink things. Instead, they pummel revelers until they dance the pain away. Walder once said that the best advice he ever got was to make his complex tracks “more stupid,” and the lesson stuck: “I think I found a way to bring the complexity into the simpler tracks that’s cool for people on the floor but also satisfying for me.” July 13 at 8 p.m. (doors) at Flash. $8-$15.

Rich Homie Quan

A few years back, Rich Homie Quan was on top of the hip-hop world. Armed with a silky smooth, melodic flow and a hustler’s charisma, the Atlanta rapper scored such hits as “Type of Way” and “Lifestyle.” But despite naming a mix tape “I Promise I Will Never Stop Going In,” he did stop going in, largely the result of a bungled non-apology for lyrics on two tracks that hit the Internet that seemed to condone rape. Now, after a few years out of the spotlight, Quan is back, sounding older and wiser on a pair of projects — “Back to the Basics” and “Rich as in Spirit” — that are true to their titles. July 14 at 7 p.m. at Tropicalia. $15-$65.


Rich Homie Quan is sounding older and wiser and will be at Tropicalia for a show on Saturday. (Alberto E. Rodriguez/Getty Images for BET)
Halsey

Even if you don’t know her name, you’ve undoubtedly heard Halsey’s voice: She’s the female counterpoint on the Chain­smokers’ 2016 EDM pop smash “Closer,” which has more than 2 billion-with-a-B views on YouTube. As a solo artist, the 23-year-old Halsey (nee Ashley Frangipane) has mined similar ground on a pair of albums, pumping out glossy electropop crowd-pleasers. At times, Halsey’s music follows pop machine formulas a little too closely, but she is at her best when at her most personal. That’s the case on the unambiguously queer “Strangers,” a duet with Fifth Harmony’s Lauren Jauregui, where Halsey really makes a name for herself. July 15 at 8 p.m. at Wolf Trap. $40-$80.

Japandroids

Japandroids sounds like a band out of time. The Vancouver-born duo of Brian King and David Prowse makes straight-ahead rock that rewires classic rock anthems with punk rock electricity. For years, the title of the band’s first single, “Young Hearts Spark Fire,” was a rallying cry, and the pair’s overdriven, heart-on-sleeve approach reached its apotheosis on 2012’s “Celebration Rock.” And when Japandroids returned from a hiatus in 2017 with “Near to the Wild Heart of Life,” those hearts were a little harder and their methods less bare-bones. But their songs — which grapple with maturity and mortality this time around — still rock. July 19 at 8 p.m. and July 20 at 9 p.m. at the Rock & Roll Hotel. Sold out.