We examined how visual feedback from electronic tuners affected trombonists' pitch performance and tuning confidence. High school (n = 29) and college trombonists (n = 30) were tasked to play in tune with a stimulus tone (G3) recorded by a professional trombonist presented through headphones. Following each of three attempts, participants rated their confidence level that their performance was in tune. A different tuner was provided during each tuning attempt and set to one of three conditions: in-tune (A = 440Hz); flat (A = 437Hz); and sharp (A = 443Hz). These tuner conditions displayed either accurate (A = 440Hz) or inaccurate (A = 437Hz; A = 443Hz) visual feedback. Results indicated significant main effects due to tuner condition and experience level. Participants' tuning accuracy with the sharp tuner was significantly less precise in comparison to flat and in-tune tuners. Collegiate participants performed with greater precision than high school participants in all tuner conditions. Weak relationships were observed between participants' tuning performance and confidence ratings.