Measurements:

I have done some measurements with an app and it red 70db at 715Hz.

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Hardware:

I have heard of using rubber mats, but will they work if i screw on the motor into its mounting plate really tight? Right now its mounted in a 3D printed housing, fully enclosed and screwed in from the front. "enclosed" as in Both tight directly around the motor - aswell as in a housing thats the same mesh/housing as the slot where the motor fits.

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Software:

Also is it possible to dampen it via software? This is my first programming projekt and i just copied some code from online, but if i set the motor to 0 speed via the variable resistor dial it does a klicking sound as if some "micro pulses" are getting through. Also there is a high pitched background noise from it at around 2kHz though i think thats the driver maybe.

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Stats:

I used an arduino micro for the code, a DM556T as the driver and a 23HS45-4204S as the motor with your standard chinesium PSU (those silvery ones). Code i shamelessly stole from Beginners Guide To Using Large Stepper Motors: #087 by Jeremy Fielding

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Thanks for your time in advance