The personal touch.
That's what sets Voices Only apart from the field.

Recording. Album production. Arranging.
Private masterclasses. ICCA coaching.

Whatever we're helping you with, Voices Only strives to work WITH you at every step of the process. We're not done until you're completely satisfied. These are our core directives:


We love COLLABORATING with groups and artists to find their true sound and together create something magical. We don't want to do this by ourselves and we don't want to put the burden on you. It's all about working together to create great art.

We believe HONESTY is one of the most important things in life and in business. From day one, we're open with you about everything we're doing together, and we'll keep you in the loop and answer any questions along the way. There's enough stress and anxiety in the world, who needs more?

We're not satisfied until you've reached maximum SATISFACTION. That's our #1 goal, assuring you're happy with what we've provided and what you've gotten from us.

We absolutely LOVE a cappella, love making music, and love working with our friends and clients to provide an amazing experience and an amazing product.

The Voices Only Productions Team

Owner / Founder / Producer / Recording & Editing Engineer

Corey Slutsky

Corey Slutsky is the owner and founder of Voices Only, started in 2005 with the inaugural edition of the collegiate compilation album Voices Only 2005. Corey is the Executive Producer for the Voices Only scholastic compilation series, the Voices Only Forte non-scholastic compilation series, and records and produces a cappella studio recordings through Voices Only Productions.  Corey has been involved in a cappella since 1997.  He has been a singer, songwriter, vocal percussionist, arranger, musical director and president in four a cappella groups (collegiate: 4-time ICCA International Champions USC SoCal VoCals, 3-time ICCA Finalists University of Michigan G-men, University of Michigan Kol HaKavod; professional: CARA Award Winning STREETNiX). Corey's production work has garnered Contemporary A Cappella Recording Awards (CARAs) wins and nominations, and been featured on the Best of College A Cappella, Best of High School A Cappella, and Voices Only compilation albums.  Corey leads workshops and masterclasses on recording and live performance at international a cappella festivals such as SoJam, the Los Angeles A Cappella Festival, SingStrong, National A Cappella Convention, Kettering National A Cappella Festival, and the Las Vegas A Cappella Summit.  He has served as a judge for the International Championship of Collegiate A Cappella (ICCA), International Championship of High School A Cappella (ICHSA), SingStrong's ACA-Idol College and Pro Competition, SingStrong's High School Competition, and USC's Absolut A Cappella competition, a nominator and judge for the Contemporary A Cappella Recording Awards (CARAs), an album reviewer for the Recorded A Cappella Review Board (RARB), consulted the casting agent for NBC's The Sing-Off, and produced his master’s thesis on “the growth and explosion of a cappella music from 1990-2005.” Corey received his bachelor's degree in Sports Management from the University of Michigan and his master's degree in Broadcast Journalism from the University of Southern California.


Marty Gray

Marty Gray is the music director of the University of Michigan G-men. He has been arranging award-winning material since his Junior year of high school in 2010, and has taken an interest in experimental and post-contemporary a cappella. He has composed and arranged more than fifty vocal works across many skill-levels and genres. Arranging accolades include Best Arrangement for ICCA Quarterfinals and Semifinals in the 2013-2014 season, Best Arrangement for ICCA Semifinals and Finals in the 2014-2015 season, Best Male Song for the 2016 CARA awards, features on Voices Only 2015 and BOCA 2016 compilation albums, plus mentions on RARB and Acaville radio reviews.

Grace Kendall

Grace Kendall graduated from the University of Michigan, and during her time there was the Music Director for Amazin' Blue, the University's oldest and most decorated a cappella group, for three years, guiding them to receive eight awards at the ICCA and a first place finish at SingStrong Chicago. She received the Best Arrangement award at the ICCA for a creative and unusually dark take on a Kanye West piece and loves to make accessible arrangements that are easy to pick up, but sound lush and full.

Nick Martin

Nick Martin graduated with a music degree from Eastern Michigan University and founded Eastern Michigan's only a cappella group, Evergreen, while leading them to a successful first year as music director and president. Nick has arranged for groups across Michigan including Fish N' Chips of Central Michigan and Amazin' Blue of the University of Michigan and won Best Arrangement in the quarterfinal round of the 2015 ICCA for his pandiatonic, tempo-less arrangement of Justin Timberlake's "Blue Ocean Floor." Nick enjoys arrangements that feature tight harmonies, strong melodies, and chord clusters in the style of Eric Whitacre and modern composers.

Voices Only Forte
Voices Only Forte VI
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