Md10-pot motor controller

I’m using a md10-pot to control my 12 vdc motor.
When i use the pot to control speed, it works perfectly from 0 to max without any noises.
When i use the PWM input, the motor get very noisy except at max speed.
I use arduino and the CytronMotorDriver.h library.
Any sugesstions?
Eric

Hello @googleeric1 and welcome to the RobotShop forum,

This is normal, I suggest you read this blog for more information

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