It means basically I'm using the synthesizer more to change the sounds of other things rather than to use it as the source of the sound.
John FruscianteWhat I do on my solo stuff is just the most natural version of who I am, and Iām trying to represent the feelings that Iām feeling as purely as possible
John FruscianteEven if my songs are a bit low-spirited, they make me happy. I become happy when I hear sad songs. When you sing about sad things in a beautiful way, the atmosphere turns upside down
John Frusciante