Iranian tar player Sanaf jams with a khartaal master on stage

Kayamb player Tiloun Depatater

Kamaicha ustad Dapu Khan

Mon Laferte performs on day two of the Austin City Limits Music Festival's first weekend in Austin, Texas.

Sylvan Esso's Amelia Meath, left, and Nick Sanborn perform on day three of the Austin City Limits Music Festival's first weekend in Austin, Texas.

Greta Van Fleet's Jake Kiszka's has his hair untangled from his guitar by a stagehand while performing on day one of the Austin City Limits Music Festival's first weekend in Austin...

Greta Van Fleet's Jake Kiszka, center, and Josh Kiszka perform on day one of the Austin City Limits Music Festival's first weekend in Austin, Texas.

Charli XCX performs at W Hollywood during WAKE UP CALL, the weekend-long music festival from W Hotels Worldwide in Los Angeles.

Leon performs at W Hollywood during WAKE UP CALL, the weekend-long music festival from W Hotels Worldwide in Los Angeles.

Swedish singer Lykke Li performs during her concert on the first day of the 26th Sziget (Island) Festival on Shipyard Island, Northern Budapest, Hungary.

A light installation is seen on the first day of the 26th Sziget (Island) Festival on Shipyard Island, Northern Budapest, Hungary. The Sziget Festival is one of the biggest cultura...

A festival goer backdropped by a light installation on the second day of the 26th Sziget (Island) Festival on Shipyard Island, Northern Budapest, Hungary.

People are silhouetted against a light installation on the second day of the 26th Sziget (Island) Festival on Shipyard Island, Northern Budapest, Hungary. The Sziget Festival is on...

Festivalgoers appear at Lollapalooza in Grant Park in Chicago.

Camila Cabello performs on day one at Lollapalooza in Grant Park in Chicago.

The American pop rock band Imagine Dragons with lead vocalist Dan Reynolds performs at the Xfinity Center, in Mansfield, Mass.

General atmosphere at The Governors Ball Music Festival at Randall's Island Park in New York.

Rapper Travis Scott performs at The Governors Ball Music Festival at Randall's Island Park in New York.

A participant in a fancy costume performs at the Wave Gothic Festival (WGT) in Leipzig, Germany.

A participant in a fancy costume poses for photographers at the Wave Gothic Festival (WGT) in Leipzig, Germany.