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dc42
I think the problem may be that the MKS SBASE uses DRV8825 drivers, which are known to be noisy with low-inductance motors when configured in fast decay mode, especially when using higher supply voltages. But I don't know whether the MKS SBASE does configure the drivers in fast decay mode. See [cabristor.blogspot.co.uk] for more.
I looked at the website (http://cabristor.blogspot.co.uk/2015/02/drv8825-missing-steps.html), but there is also sound (like a music) when extruder print a circle shape. I listen to Zortrax, Makerbot and Ultimaker, there is no sound when printing. Why? What are their boards, motors or motor drive?