The Chamber Music Society of Lincoln Center will perform Gregg’s chilling musical ghost story, The Tell-Tale Heart, on Halloween! This will be the Lincoln Center debut of Gregg’s music. Jennifer Johnson Cano, mezzo-soprano; Nicholas Canellakis, cello; pianist to be announced.

The world premiere of Gregg’s adaptation of Mary Shelley’s iconic novel, Frankenstein, will be produced in the 2023-24 season by Arizona Opera. Commissioned by Arizona Opera and funded in part by a gift from Linda and Stuart Nelson, Frankenstein will premiere with performances in Phoenix and Tucson. Arizona Opera’s President and General Director, Joseph Specter, said, “The timelessness of Shelley’s novel, combined with Gregg’s compelling score and libretto, will create an impactful opportunity for the opera art form to connect with both long-time devotees and newcomers alike… We believe this opera will become an important addition to the contemporary operatic canon.”

"Here [in Sketches from Frankenstein], as in The Tell-Tale Heart, Kallor achieved a perfect balance of text and music. The libretto hued quite closely to Mary Shelly’s original text, serving as a welcome reminder of her wonderful prose. Kallor’s music is a most interesting synthesis of elements of classical and jazz, galvanized into a singular compositional voice. There is plenty of heartfelt lyricism in his music, yet also enough complexity to keep it intriguing for those of us who seek more." –Arlo McKinnon, Opera News

But if I simply must select a single performance, above all, then that is actually quite easy: Gregg Kallor’s “Sketches from Frankenstein.” - Matt Costello, Opera Wire

The world premiere of Gregg's Frankenstein sketches and the reprise of The Tell-Tale Heart were included in WQXR's Most Memorable Concerts of 2018!

Joshua Roman conducts the world premiere of Gregg's new work for string orchestra, performed by the Seattle Youth Symphony Orchestra and commissioned by Town Hall Seattle.

June 21 at 7:30pm at Town Hall Seattle, WA.

Gregg teams up with the fantastic Attacca Quartet for the world premiere of his new piano quintet, commissioned by The Classical Recording Foundation and funded by a generous gift from Linda and Stuart Nelson.

June 5, 2017 at 7:30pm at The Sheen Center in New York City.

The Crypt sessions presents the world premiere of Gregg's setting of Edgar Allan Poe's terrifying short story, The Tell-Tale Heart, in a 100-year old vaulted crypt, featuring mezzo-soprano Elizabeth Pojanowski and cellist Joshua Roman in a semi-staging by Sarah Meyers with lighting design by Shawn Kaufman.

October 26 & 28, 2016, presented in collaboration with On Site Opera.

Soprano Melody Moore and pianist Robert Mollicone give the world premiere of Kallor's setting of Clementine Von Radic's gorgeous poem, A Prayer.

May 25, 2016 at Carnegie Hall.

Kallor is the inaugural Composer-In-Residence at SubCulture in New York City, named one of Time Out New York's best new music venues. The first season of his residency features world premieres of a solo piano suite; new songs with soprano Melody Moore, mezzo-soprano Adriana Zabala and baritone Matthew Worth; and a piano trio with violinist Miranda Cuckson and cellist Joshua Roman.

Kallor joins an all-star roster of musicians, including Joyce DiDonato, Yo-Yo Ma, Jamie Barton, Isabel Leonard, Susanna Phillips, Anthony McGill, actors Sharon Stone and Ansel Elgort, and many more, for An AIDS Quilt Songbook: Sing for Hope. Kallor recorded two songs for the album, with Melody Moore - "One Child," which Kallor composed for this project - and Matthew Polezani. All profits from the sale of this album go to amfAR, The Foundation for AIDS Research.

Kallor's music videos are "a visual feast for the eyes," writes Feast of Music: "Espresso Nirvana" (think caffeinated hijinks) and "Broken Sentences," which features the 88 artist-designed pianos that Sing For Hope placed in parks and public spaces all around NYC from June 1-15, 2013, where anyone could play them. Gregg did. A lot.