Both the California Symphony and the Oakland East Bay Symphony are closing out their respective seasons with final concerts this weekend, but each of them has another shoe or two to drop as well.

In the case of the California Symphony, that will be the announcement, sometime in the weeks to come, of a new permanent music director for the 25-year-old organization. Robert Trevino, the guest conductor for this weekend's series of concerts in Livermore's Bankhead Theater (Friday night) and Walnut Creek's Dean Lesher Regional Center for the Arts (Saturday night and Sunday afternoon) is the seventh and final candidate vying for the position in a series of "tryout" concerts that have filled the subscription season. Trevino, associate conductor of the Cincinnati Symphony, has quite formidable material for his audition: Beethoven's Violin Concerto, with Caroline Goulding as soloist, Berlioz's mighty "Symphonie Fantastique" and the world premiere of California Symphony resident composer D. J. Sparr's "Violet Bond: Concerto-Overture," featuring the composer as soloist on electric guitar.

Competition is on

The guest conductor's competition, for those of you who have not been keeping close watch, has been impressive: Robert Moody, David Commanday, Michael Butterman, Sean Newhouse, Alastair Willis and San Francisco Symphony resident conductor Donato Cabrera have gone before him and are all still in the running.

Over in Oakland, Michael Morgan and his estimable musicians will call it a season with a jam-packed concert at 8 p.m. Friday in the Paramount Theatre. Bach's glorious "Magnificat" is on the program, with soprano Shawnette Sulker, countertenor William Sauerland, tenor Trey Costerisan, baritone Nikolas Nackley and the Pacific Boychoir providing the vocal forces. Pianist Terrence Wilson, a Juilliard graduate with an Avery Fisher Career Grant, a Grammy nomination and performances with most of the major symphony orchestras of the country among his credentials, will be the soloist for Beethoven's Fifth Concerto, the "Emperor." Cesar Franck's tone poem "Le Chasseur Maudit" ("The Accursed Huntsman") will bring the darker, more sinister elements to the program, labeled "Saints and Sinners," and the world premiere of composer and OEBS principal cellist Daniel Reiter's "Mysterium" will be another decided highlight when it opens the program.

Tribute to a jazz icon

With all that effort mounted, you'd think Morgan and the orchestra would be ready to hang up their hats and go home, but they will be back within a month for a star-studded tribute to a late East Bay icon, a "Celebration of the Music of Dave Brubeck," at the Paramount on June 1. Opera star Frederica von Stade and singer Wesla Whitfield will be among the performers, who also include jazz pianist Taylor Eigsti; percussionist Jason Lewis; saxophonist Dayna Stephens; and Brubeck's son, the trombonist and bassist Chris Brubeck, whose symphonic collaboration with his father, "Ansel Adams: America," will be performed as 102 of the famed photographer's most stunning prints are projected on a screen.

As busy as they are, anticipation is still running high for Oakland East Bay's next season, which will be their landmark 25th, with plans announced late last week. The 2013-14 season will open with a bang and go out with a loud roar: The Giuseppe Verdi and Richard Wagner bicentennials will be observed on opening night Nov. 8, with Verdi's Overture from "La Forza del Destino" and the "Ritorna vincitor!" aria from "Aida" (sung by soprano Othalie Graham) anchoring a program that includes Mason Bates' "Mothership" and concludes with the heart-pounding Immolation Scene from Wagner's "Gotterdammerung."

The symphony's season closes with a 25th Anniversary Finale on May 16, 2014, entirely devoted to Hector Berlioz's monumental Requiem, harnessing the forces of the orchestra, the Oakland Youth Orchestra, the Oakland Symphony Chorus and opera star Thomas Glenn, tenor.

Contact Sue Gilmore at sgilmore@bayareanewsgroup.com

ticket information

California Symphony: 8 p.m. Friday, Bankhead Theater, Livermore, $35.50-$55.50, 925-373-6800, www.mylvpac.com; 7:30 p.m. Saturday and 4 p.m. Sunday, Dean Lesher Regional Center for the Arts, Walnut Creek, $35-$65, 925-943-7469, www.lesherartscenter.org
Oakland East Bay Symphony: 8 p.m. Friday, Paramount Theatre, Oakland, $20-$70, 510-444-0801, w3ww.oebs.org; 8 p.m. June 1, Paramount Theatre, Oakland, $35-$80, www.ticketmaster.com or in person at the box office at 2027 Broadway, Oakland; 2013-14 season subscriptions, $51-$310, 510-444-0801, www.oebs.org; single tickets go on sale in October.