 Stirling has been using the Yamaha Electric Violin since 2000, and the Luis and Clark violin was made famous after she used it in her cover version of "Radioactive" with Pentatonix in 2013.For studio recording, Stirling uses an early 1900s Ernst Heinrich Roth ""Roth"" acoustic violin most of the time and her Yamaha silent violin for an extremely clean sound.Before using the "Nero", Stirling used her "Roth" during live performances.