With a USB MIDI Teensy LC and Silent Step Stick stepper drivers interface I made, I did a little loudness test with some stepper motors.

There is plenty of comparisons on Youtube between Silent-Step-Stick driver and other drivers, but I could not find any motor loudness comparison.

I though it could be useful for someone who looks for a setup that is next to silent.

http://liveelectronics.musinou.net/u...entStepper.php