RC boat pixhawk problem

Hi I have a large boat with the radiolink pixhawk auto pilot and I am getting interference issues I’m holding the rudder hard over and it moves as it wants and the noise i can hear is interference with my sound module please let me know how to solve.

Is it noise affecting the compass or noise affecting the pwm to the rudder servo? When you say you can hear it in sound module what exactly to you mean and what do you hear?

The noise is affecting the compass it is about 5 miles out from where the actual model is sometimes also the sound module was unplugged that is noise from the signal wire that goes from the sound card to the amplifier