Revert frequency changes

Needs more investigation. Suspended for now.

Marlin/Configuration.h

@@ -380,9 +380,9 @@
   // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 
   // i3 Mega stock v5 hotend, 40W heater cartridge (3.6Ω @ 22°C)
-  #define  DEFAULT_Kp 18.58
-  #define  DEFAULT_Ki 1.38
-  #define  DEFAULT_Kd 62.40
+  #define  DEFAULT_Kp 15.94
+  #define  DEFAULT_Ki 1.17
+  #define  DEFAULT_Kd 54.19
 
   // Ultimaker
   //#define  DEFAULT_Kp 22.2
@@ -437,9 +437,9 @@
   //#define PID_BED_DEBUG // Sends debug data to the serial port.
 
   //Anycubic i3 Mega Ultrabase (0.9Ω @ 22°C)
-  #define DEFAULT_bedKp 187.45
-  #define DEFAULT_bedKi 35.75
-  #define DEFAULT_bedKd 245.71
+  #define DEFAULT_bedKp 251.78
+  #define DEFAULT_bedKi 49.57
+  #define DEFAULT_bedKd 319.73
 
   //120V 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
   //from pidautotune
@@ -1834,13 +1834,13 @@
 // Use software PWM to drive the fan, as for the heaters. This uses a very low frequency
 // which is not as annoying as with the hardware PWM. On the other hand, if this frequency
 // is too low, you should also increment SOFT_PWM_SCALE.
-#define FAN_SOFT_PWM
+//#define FAN_SOFT_PWM
 
 // Incrementing this by 1 will double the software PWM frequency,
 // affecting heaters, and the fan if FAN_SOFT_PWM is enabled.
 // However, control resolution will be halved for each increment;
 // at zero value, there are 128 effective control positions.
-#define SOFT_PWM_SCALE 2
+#define SOFT_PWM_SCALE 0
 
 // If SOFT_PWM_SCALE is set to a value higher than 0, dithering can
 // be used to mitigate the associated resolution loss. If enabled,