In many ways, the Green Umbrella series is one of this city’s best bargains. Not only are ticket prices much cheaper than at L.A. Philharmonic’s performances of traditional orchestral works, the stripped-down L.A. Phil New Music Group dares to explore the very limits of sound and space through modern pieces that are alternately challenging, strangely beautiful, experimental and thrilling.

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Daníel Bjarnason (photo by Harrison Parrott)

Icelandic composer-conductor Daníel Bjarnason welcomes his celebrated countryman, pianist Víkingur Ólafsson, for a set of selections by Bent Sørensen, intrepid Finnish composer Kaija Saariaho and Bjarnason alongside the world premiere of Thurídur Jónsdóttir’s The CV of a Butterfly. Afterward, L.A. Phil’s coolly masterful timpanist Joseph Pereira leads multiple percussionists in a post-concert set.

Walt Disney Concert Hall, 111 S. Grand Ave., downtown; Tues., Feb. 4, 8 p.m.; $20-$64. (323) 850-2000, laphil.com.

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