As different guitars have a different amount of output volume, your guitar may cause a little less or more drive than needed. Use the "Effect" slider to set the amount of drive that sounds the best for you.

If you feel like there is not enough drive, just increase the value of the "Effect". Move the slider to the right to create a more overloaded sound.

If there's too much drive, reduce the value of the "Effect". You will get the cleanest sound in the far-left position.