Alexander Vittal earned a Bachelor of Music degree in Viola Performance from Arizona State University and Master of Music degree in Viola Performance and Pedagogy from the University of Colorado–Boulder.  Alex has diverse musical tastes, performing orchestral music as a member of the Steamboat Symphony Orchestra, traditional Argentine tango music with Orquesta Típica Natural Tango, Baroque music on period instruments with the Baroque Chamber Orchestra of Colorado, and a wide variety of musical styles with Sphere Ensemble, for whom he is also Executive Director and Arranger.  Also dedicated to social justice through music education, Alex spent 7 years working with underserved elementary and middle school students as a Teaching Artist with El Sistema Colorado, and continues in an advisory and volunteer role.  Mr. Vittal also works as a private viola and violin teacher at Dana V. Music in Louisville, CO. 

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Cellist Beth Rosbach has resided in Colorado since 2001. Known for her musical versatility, Ms. Rosbach has performed with orchestras, chamber music groups, and bands throughout the United States, Europe, and Australia. She has appeared on stage with musicians as diverse as bluesman Otis Taylor, cellist Lynn Harrell, pop and electronic musician Moby, and newgrass band Railroad Earth. Ms. Rosbach has played on dozens of recordings, including several with noted Denver singer-songwriter Covenhoven. 2017 saw her debut as a composer when she performed her music in a collaboration with Winifred Harris Productions' original modern dance work, "How to Tame an Elephant." In 2011 Ms. Rosbach founded Sphere Ensemble, the Denver-based string chamber group known for its 21st century take on classical music. She is an enthusiastic advocate for musician wellness, including studies of the Alexander Technique.

Ms. Rosbach holds cello performance degrees from The University of Colorado and The University of Oklahoma. She maintains a flourishing private teaching studio in Boulder, and performs concerts and shows across the United States. 

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Brett Armstrong is a Doctoral student at the University of Colorado at Boulder, where he studies with Dr. Paul Erhard. Brett received his Master of Music from the University of Colorado in 2016. Before his move to Colorado, Brett received his Bachelor of Music from Western Michigan University (Magna Cum Laude) while studying under Tom Knific. Brett is currently the principal bass of the Fort Collins Symphony, Cheyenne Symphony Orchestra, and Greeley Philharmonic Orchestra. Brett also plays regularly with the Colorado Symphony Orchestra, Colorado Bach Ensemble, Pro Musica Colorado, and Colorado Springs Philharmonic, and has performed with Opera Colorado, and the Steamboat Springs Opera. In addition to his orchestral playing, Brett plays a wide variety of music from baroque to modern music. Brett is a member of Boulder Bach Festival’s CORE ensemble where he plays baroque music with period instruments. In the summer of 2018 Brett premiered an arrangement of a modern solo cello piece at the Sante Fe Chamber Music Festival as a part of the Creative Dialogue program. Brett teaches privately, and coaches sectionals weekly at Denver School of Arts. Brett has played in Sphere Ensemble since early 2019. 


Brett Omara, is the founder and lead violinist of the Classical crossover electric string group "Spinphony”. The ladies perform for both private and public events in Colorado and nationally.  Highlights from this past year include performances at Red Rocks Amphitheater, with the Pueblo Symphony, and in Iceland for Visit Denver. Brett is also the owner of Oncue Entertainment, a boutique entertainment agency in Denver that provides unique and innovative instrumental acts. This year, she will have produced, performed, and managed entertainment for over 150 events in Colorado and nationally. Oncue’s musicians have performed with 2Cellos, Trans -Siberian Orchestra, Evanescence, Kanye West, Portugal the Man, Il Volo, Josh Groban, & Il Divo. Brett also composes original instrumental music and released her first full length album in 2017 which is with several music licensing companies. 

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A native from Paris, France, Brune Macary has been an active performer in the Boulder area for the past seven years. Specializing in Baroque music, she is a member of the Baroque Chamber Orchestra of Colorado, the Boulder Bach Festival as well as Seicento Baroque Ensemble. She plays modern violin as the Associate Principal Second with the Boulder Chamber Orchestra and is a member of Sphere Ensemble. She earned her Bachelor’s and Master’s degrees in Music Performance at the Lawrence Conservatory and at the University of Nevada, Reno, respectively. She also studied Music Pedagogy at CU Boulder. Besides performing, she maintains an active studio of about 25 violin and viola students.


Emily Rose Lewis is a Denver-based violinist and fiddler who grew up in the neighboring state of Kansas. In addition to being a founding member and violinist for Sphere Ensemble, she plays violin and sings back-up with Monocle Band, as well as Jesse Manley and His Band. She also collaborates frequently with Covenhoven, and the Mont Alto Motion Picture Orchestra.

Emily holds a Bachelor of Music in Music Education from the University of Wisconsin-Madison, and a Master of Music in Violin from the University of Colorado at Boulder. She also holds a Master of Library and Information Science from the University of Denver.

Emily teaches violin, fiddle, and viola at Swallow Hill Music, and Do Re Mi Lessons. She also composes music, and recently wrote music for a ballet with David Short, a frequent arranger for Sphere Ensemble. 

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Joseph Howe is a cellist based in Boulder, Colorado. In addition to performing with Sphere Ensemble, he is the principal cellist of the Boulder Chamber Orchestra and the assistant principal cellist of the Greeley Philharmonic. He also performs as a substitute cellist with New World Symphony, Colorado Music Festival Orchestra, Colorado Springs Philharmonic, and Boulder Philharmonic. As a baroque cellist, he has performed with Boulder Bach Festival and Seicento Baroque Ensemble. In the summer of 2019, Joseph will participate in the American Bach Soloists Academy.

Other recent festival appearances as an orchestral and chamber musician include Trinity Alps Chamber Music Festival, National Repertory Orchestra, Mendocino Music Festival, Texas Music Festival, and Hot Springs Music Festival.

Joseph holds degrees from University of Oregon, where he studied with Steven Pologe, and University of Colorado at Boulder, where he studied with Judith Glyde. His other mentors include David Requiro, Bruce McIntosh, Guy Fishman, and Ann Marie Morgan.

Joseph is dedicated to teaching young cellists. In addition to serving as a teaching assistant at CU Boulder, he has held teaching positions at Red Rocks Community College, Boulder Valley Waldorf School, Parlando School for Musical Arts, and Greater Boulder Youth Orchestras. 


Lauren Spaulding, a Texas native, received her BM and MM in Viola performance, working under the tutelage of Professor Peter Slowik at the Oberlin Conservatory of Music and Geraldine Walther of the Takács Quartet. As a soloist, Spaulding has worked with and learned from many notable performers including Nobuko Imai, Kim Kashkashian, Antoine Tamestit, Lawerence Power, Pinchas Zukerman, Dimitri Murrath, James Dunham, and Yizhak Schotten. Additionally, Spaulding’s musical career has been heavily influenced by her love for collaboration, leading her to study chamber music under the extensive guidance of Karen Ritcher, the Takács Quartet, the Cavani Quartet, and with Darrett Adkins at the Juilliard School of Music, Roger Tapping of the Juilliard String Quartet, the Ying Quartet, the Pro Arte Quartet, and the Orpheus Ensemble. In 2012, Spaulding’s Quartet was invited to perform at the White House for President Obama to commemorate American composers as a “Champion of Change”. Spaulding continues to use her love for chamber music to advocate for under-represented composers, young neuro-atypical musicians, and works with Kim Kashkashian and her team as a Co-Chapter head for the ‘Music for Food’ initiative, fighting food insecurity. 

Spaulding is based in NYC & Denver where she is a member of Meredith Monk’s performance ensemble, a regular with the Colorado Symphony, and recording artist with award winning studios such as ‘Found Objects Music’ in NYC. Lauren’s playing can be heard on “Social Dilemma” & “Modern Love” Season 2. Lauren performs with Pro Musica Colorado, Boulder Bach, So & So New York, the Playground String Quartet, and is the Principal Violist & Festival Artist for Colorado MahlerFest alongside Jorja Fleezanis, Erika Eckert, and Perry Karp. Spaulding has performed chamber music with members of the Cavani Quartet, the Tesla Quartet, the Ying Quartet, the Takács Quartet, the Pro Arte Quartet, and alongside members of the BBC Symphony Orchestra, the Houston Symphony, the London Symphony Orchestra, the San Francisco Ballet, the RTÉ National Symphony Orchestra, the Hong Kong Philharmonic, the Minnesota Orchestra, the San Francisco Symphony, the English Symphony Orchestra, the New York Philharmonic, the Chicago Symphony, and the Cleveland Orchestra.

Spaulding is a current finalist for the ‘Music International Grand Prix’ solo competition held in Carnegie Hall April of 2021, and has recently placed first in the Reno Pop’s Concerto Competition. Spaulding has been invited, for summer 2021, to be a featured artist at Yellow Barn with Kim Kashkashian, as a featured artist at Virtuoso Bel Canto with Nobuko Imai, and as a featured artist at the Menuhin Academy with Ettore Causa. 

“I have never heard so many different colors! ... I think your instinct is so strong and also right.”

       ~Nobuko Imai, Violist

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Nina Fronjian began her musical training at age 6, and holds a Master of Music in violin performance from the University of Colorado Boulder, where she served as a graduate teaching assistant. Additionally, she holds a Bachelor of Fine Arts in violin performance from the University of Wisconsin-Milwaukee. She enjoys playing in orchestral, chamber, solo, and alternative settings, performing both historic and contemporary works across a diverse range of musical genres.  Appearances include Gregory Alan Isakov’s touring orchestra, Denver’s DazzleJazz classical series, the Estes Park Music Festival, and as a featured soloist with the Colorado New Music Ensemble. She currently performs with the Fort Collins Symphony, Boulder Chamber Orchestra, Sphere Ensemble, Central City Opera Orchestra, and Orquesta Tipica Natural Tango. 


Violinist Sarah Elizabeth Cranor is passionate about the freedom of sonic possibilities found in both historical and contemporary music.  She currently directs the Latin American Ensemble at Indiana University, which explores the intersection of European music with the colonization of the New World.  Sarah performs regularly with the Indianapolis Baroque Orchestra, the North Carolina Baroque Orchestra, Bourbon Baroque, and has been music director for the Bloomington Bach Cantata Project.  Recent and upcoming collaborations include Chatham Baroque, Alchymy Viols, the Atlanta Baroque Orchestra, Burning River Baroque, Sphere Ensemble, ¡Canta, Bogotá, Canta!, the Kansas City Baroque Consortium, the Michigan Bach Collective, the Princeton Festival, the Berwick Academy of the Oregon Bach Festival, the Junges Stuttgarter Bach Ensemble, the Weimarer Bachkantaten-Akademie, Sun Sneeze New Music, and “fresh inc” festival for new music.  Sarah is finishing a Doctor of Music degree at the Jacobs School of Music in Historical Performance with Stanley Ritchie, with minors in modern violin with Grigory Kalinovsky and music education with Mimi Zweig. When she is not holding a violin, she makes silk instrument bags sold worldwide through Sarah’s Violin Bags LLC, and she enjoys running marathons and hiking with her husband, conductor and violinist Alejandro Gómez Guillén.

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Sarah Whitnah holds a Bachelor’s Degree in Violin Performance from St. Olaf College, and a Master’s Degree from the University of Denver where she studied with violinist Linda Wang. During her time at St. Olaf College she toured both domestically and internationally with the St. Olaf Orchestra, serving as it’s Concertmaster from 2007-2008. She continues her orchestral involvement currently holding titled positions in both the Fort Collins and Cheyenne Symphonies. Taking an active role in supporting new music and today’s emerging composers, Whitnah performs as the principal violinist for the new music chamber ensemble, The Playground Ensemble, artists-in-residence at Colorado Metro State University. Ms. Whitnah has also performed with notable artists including, Glee’s Daren Criss, Kygo, Tina Guo, and Mannheim Steamroller. Additionally, Whitnah maintains a private teaching studio at her home in Arvada, CO, where she lives with her husband and small dachshund Stormaggedon.


Veronica Sawarynski, violinist, fell in love with the violin at age 6 with Suzuki pedagogue Alliree Meyers in Golden, CO.  She obtained music performance degrees from University of Denver and University of Colorado at Boulder, as well as playing intensively with the Anasazi String Quartet under the tutelage of the Takacs Quartet (CU Boulder) and the Pacifica Quartet (University of Illinois Champaign-Urbana).

Veronica shares her love of music as an active violin teacher, and is Suzuki certified under pedagogue James Maurer (Books I-VIII).  She currently teaches privately at her home, and has coached students at Boulder Suzuki Strings, Fort Hays State University’s High Plains Summer Music Festival, and performed numerous school outreach concerts as first violin with the Boulder Philharmonic Education Quartet.

Veronica performs throughout Colorado with Sphere Ensemble, as Section First Violin with Boulder Philharmonic, and Section Violin with Opera Colorado.

Highlights in recent years include performing  at the Kennedy Center’s Shift Festival and Washington, D.C’s Cherry Blossom Festival with Boulder Philharmonic and Boulder Philharmonic Education Quartet in March 2017.

She was also invited to play first violin, give private lessons to violin majors, present a vibrato tutorial to string pedagogy students, and prepare and perform Elvis Costello’s Juliet Letters for voice and string quartet with faculty at Fort Hays State University’s Cottonwood Festival in April of 2015.

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Conductor and violinist Alejandro Gómez Guillén is entering his fifth season as Artistic Director and Conductor of Bloomington Symphony Orchestra. Following a successful tenure as Associate Conductor of Fort Worth Symphony Orchestra, he is also Artistic Director of Denver's Sphere Ensemble, Acting Concertmaster / Principal Second Violin of Midland-Odessa Symphony & Chorale and member of the Permian Basin String Quartet. Alejandro also served as Freeman Conducting Fellow with Chicago Sinfonietta, Associate Conductor of Boulder Symphony and as Music Director of Cantabile.

Recent and upcoming activities include performances with the Chicago Sinfonietta, through the Orquesta Filarmónica de Bogotá, Midland-Odessa Symphony & Chorale, SingFest Hong Kong, Bogotá’s Javeriana University, Bloomington Bach Cantata Project, Midland Festival Ballet, Oregon Bach Festival Masterclass in Conducting, Weimarer Bachkantaten Akademie, ¡Canta, Bogotá Canta!, Santander Choral Festival, Cabrillo Festival with Marin Alsop, Tonos del Sur at Berkeley Festival, Permian Basin Opera, as well as a fellowship with SphinxConnect, and a residency in his native Colombia with Batuta.

Committed to working with young artists, Alejandro has served as Assistant Professor of Music at Colorado Mesa University where he taught violin, viola, courses in symphonic literature, string pedagogy and chamber music, as well as conducting the chamber and symphony orchestras. He served as Music Director of the Colorado Youth Philharmonia and has led performances with Off Broadway School of Fine Arts in Boulder, Javeriana University Symphony Orchestra, Spokane Youth Symphony, as well as University of Colorado Symphony and Chamber Orchestras.

An accomplished violinist on both modern and baroque instruments, Alejandro leads Mozart and Haydn concertos from the violin recent and upcoming seasons. He was concertmaster of Grand Junction Symphony Orchestra, Amherst Early Music Festival, and Junges Stuttgarter Bach Ensemble, with which he toured Germany and Italy including performances at Rheingau Music Festival and Berlin Philharmonie. He recently returned to Oregon Bach Festival as a member of the Berwick Academy for Historical Performance.

Alejandro’s mentors include Gary Lewis, Helmuth Rilling, Matthew Halls, and Mei-Ann Chen. He holds DMA and MM degrees in conducting and violin performance from the University of Colorado at Boulder, as well as a BM in violin performance from Texas Christian University. His doctoral research includes a critical edition of Colombian composer Jorge Pinzón’s violin concerto, and bringing selected dances from Bach’s orchestral suites in their original form to developing orchestras through a historically informed approach to playing on modern instruments.

When not playing, leading ensembles or reveling in the music of Bach, Alejandro spends his time singing, hiking, and making music with his wife, violinist Sarah Elizabeth Cranor.