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Meet our Brass Teachers


Sarah Baldus holds an active Iowa Teaching License with K-12 Music endorsements. She graduated with a BA degree in music education from Iowa State University in 2009. She began teaching instrumental music in Iowa Schools in 2010. Sarah teaches all the brass and woodwind instruments, as well as, piano and ukulele. She is a firm believer in putting the “fun” into every students’ musical education. As a professional musician, Sarah has performed with small ensembles, bands, and orchestras throughout the state of Iowa, as well as, touring Europe with the ISU Wind Ensemble.

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Martin Gelwasser is a freelance trombonist and teacher based in Eastern Iowa. Starting Fall semester 2023 Martin will be the trombone teaching artist at St. Ambrose University. In 2017 Martin completed a Master’s degree in Orchestral Studies from The Chicago College of Performing Arts at Roosevelt University where he studied with Jay Friedman and Reed Capshaw. Prior, he completed his Bachelor’s Degree in Trombone Performance at the Cleveland Institute of Music. In 2016, Martin was awarded the Anthony P. Hopkins Memorial Scholarship for outstanding trombone students. Martin currently resides in Iowa City with his fiancé and three cats, Marie, Colby-Jack, and Squid.

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Since 2005, Mike has shared his joy and passion for making music with students age 6 to over 65 in Cedar Rapids & North Liberty. Honing a balance of classical technique and fun learning through song, the student's goals and joy are always priority. Come see how fun music can be! I love when students find their joy in music, and I love seeing them grow in confidence and ability. No matter what your goals are, our approach will be as unique as you are!

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