Need quiet stepper driver for audio measurement robot

I am designing an automated microphone positioning mechanism that must be quiet to avoid interfering with audio measurements. The mechanism will be stationary during measurements (measure for 2 seconds, move, measure again, repeat…), so the main issue is buzzing while stepper motors are holding a fixed position. Do NEMA23 motors buzz when held in position by the Openbuilds BlackBox controller?

Thanks for any insights!
Few

 

Thanks! I’ll take a look.

 

Disabling the motors would eliminate their ability to hold movable parts against gravity, correct?