In the past six months, publicity over their father's crimes has caused the lives of The 5 Browns to be irrevocably changed, and their lives continue to be reshaped.

But one thing has remained constant: the musicians' commitment to each other and to the music they create together.

The world-famous sibling piano quintet from Utah will perform at Thanksgiving Point on July 11, in their first performance along the Wasatch Front since revelations about their father were reported in the media. (The quintet performed in Logan in late February.)

The three sisters — Desirae, Deondra and Melody — declined an interview request, but brothers Gregory and Ryan agreed to speak to The Salt Lake Tribune. The Brown brothers declined to talk about their father's sexual-abuse conviction but were excited to talk about their upcoming world premiere.

On Aug. 9, The 5 Browns will reach a long-held musical goal: They're scheduled to perform a world premiere of contemporary composer Nico Muhly's "The Edge of the World." The five-pianos-with-orchestra piece will be performed at the Ravinia Festival in Highland Park, Ill., with the Chicago Symphony Orchestra. The 5 Browns and the festival co-commissioned the work, the first orchestral piece written specifically for five pianos and an orchestra.

"This is something we're so crazy excited about," Ryan said. "It's something we've wanted to do since the beginning."

Melody and Gregory were classmates with Muhly at the Juilliard School in New York City. Over the past year, The 5 Browns collaborated with their friend on the piece in meetings, email exchanges and via Skype and Facebook. After the world premiere, The 5 Browns' management will shop it around to different orchestras around the country, including one close to their hometown of Alpine. "We would love to play it with the Utah Symphony," Gregory said.

The excitement is welcome news for the family in what has been a tumultuous year. The three sisters had learned their father, Keith Brown, planned to teach music to other children, so late last year they reported their own abuse to authorities.

In February, Keith Brown, the group's former manager, was charged with sexually abusing his three daughters on various occasions over a period from 1990 to 1998. Under a plea agreement, Brown pleaded guilty to one count of first-degree felony sodomy and two counts of second-degree felony child abuse. He was sentenced to 10 years to life on the first-degree offense and 1 year to 15 years on each second-degree offense, all to be run concurrently.

The 5 Browns continued a rigorous touring schedule, and the program they'll perform at Thanksgiving Point is a slight variation from the concert they performed in Logan in February.

The diverse, entertaining concert featured what has become the siblings' trademark: a mash-up of classical piano pieces written by long-dead composers, as well as more contemporary pieces such as Bernard Herrmann's music from "Vertigo" and "Psycho" and Elmer Bernstein's "To Kill a Mockingbird" theme. One highlight of the Logan show was an encore number, a cover of Coldplay's "Fix You," sung by Gregory, who was then joined by the rest of the group.

This summer will also mark a turning point for the group, at least in terms of geographical proximity. Gregory is moving from Provo to Chicago, where his wife will attend law school at the University of Chicago. Desirae is moving from Salt Lake City to New York City because her husband, violinist Bryan Hernandez-Luch, has been accepted to a master's program at Juilliard. And in the summer of 2012, Ryan plans on moving away from Alpine to finish a degree at the Manhattan School of Music.

Despite all those moves, the siblings have no plans of breaking up The 5 Browns any time soon. "We're always planning new ideas," Ryan said.

dburger@sltrib.com

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The 5 Browns

When • Monday, July 11, at 8 p.m.

Where • Thanksgiving Point Waterfall Amphitheatre, 3003 N. Thanksgiving Way, Lehi

Tickets • $28 general-admission in advance, $32 day of; $35 general-admission reserved, $40 general-admission day of, at SmithsTix

Info • Beach-style folding chairs are allowed, but blankets are preferred by venue management