Leslie Frey Anderegg began playing violin at the age of 3 in her hometown of Clinton, South Carolina. Leslie received Bachelor's and Master's degrees in Violin Performance from Indiana University and the Cleveland Institute of Music where she studied with Henryk Kowalski and Stephen Rose. She has performed on the NPR show "From the Top" and was a featured soloist with the National Repertory Orchestra. 

Before joining the Phoenix Symphony in 2005, Leslie was a member of many regional orchestras including the Greenville Symphony, Evansville Philharmonic, Akron Symphony and Canton Symphony. Leslie was Acting Assistant Principal 2nd Violin of the Phoenix Symphony from 2009-2022 and is currently a member of the 1st violin section. 
Leslie also performs regularly in Phoenix with Downtown Chamber Series and the Listeso String Quartet.   

During the summer Leslie has performed with the American Institute of Musical Studies Festival Orchestra in Graz, Austria, the Colorado Music Festival Orchestra in Boulder, and the Lucerne Festival Academy Orchestra in Switzerland. Since 2016, Leslie has spent summers with her family in Chautauqua, NY as a regular substitute violinist for the Chautauqua Symphony Orchestra where her husband Peter is a member of the cello section.  Leslie will join the 1st violin section of the CSO as a new member for the summer of 2025.