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Corin Roddick and Megan James performed in other bands such as Gobble Gobble and Born Gold before forming the ambient, dream-pop duo Purity Ring.

"When we work together, things come together effortlessly," Roddick said in a recent telephone interview. "It seems so natural."

The writing process begins when Roddick creates "a track out of nowhere," and sends the music over to James, who uses lines from her journal to create the lyrics that accompany the synthesized instrumentals. "I've never read her journal, but I imagine ... it's not a typical journal," Roddick said.

The Canadian group gives almost as much attention on its visual show as it does to its music, with Roddick attaching his keyboard to a lighting program.

"Lights respond to the music," Roddick said. "They follow whatever we're doing."

It's working. This show has been one of the best-selling shows in recent ticket broker 24Tix history.

Blue Hawaii opens.

When • Wednesday, April 10, at 9 p.m. (Tonight)Where • Urban Lounge, 241 S. 500 East, Salt Lake CityTickets • $13 in advance, $15 day of, at 24Tix