Difference between PWM OFF and Iq=0

[Vihaan]

I am implementing the code for throttle in Torque control mode with varying Iq. My clarification is in case of throttle equal to 0%, should i implement the PWM off function or just make Iq=0. I tried both options when i make PWM off or StopMotor function and when throttle is 0% it is switching off the pwm as expected but when the throttle is greater than 0% there is kind of audible sound heard when moving from pwm Off to Pwm On. To avoid it i tried giving Iq=0 when throttle is 0% but continuously there is a kind of noise heard. Please suggest me to fix this issue.