No matter what device my students use, we are having issues with mic clipping. We have tried (with no luck) different types of barriers/mufflers, as well as moving the microphone/device placement relative to the instrument.
I also believe this clipping to be a primary cause of inaccurate grading from SmartMusic.
The ability to adjust the microphone sensitivity within SM might be a solution to this problem, especially because many student devices (ie. Chromebooks) either have no ability to control the mic or is disabled from student use.