Stepper motors are known to generate audible noise as they operate, which is undesirable for many applications. Traditional stepper motor drivers with fixed-percentage mixed decay current chopping and low levels of microstepping greatly contribute to the noise. But features such as smart tune technology and high microstepping can help lower the audible noise significantly. The goal of this application report is to explain how specific motor driver features can reduce the audible noise for a wide variety of stepper motor systems and applications.