I was wondering if anyone had any schematics or reccomendations on a varitone. Essentially what I am looking for is something similar to my alembic spoiler. It has a variable filter with a Q switch that peaks the frequency selected by the filter. I would like something similar for my P/J bass, and my mustang bass. I guess I would like it to essentially act as a low pass filter with a resonant peak. I am assuming a continually variable one like on the alembic would be expensive/difficult to build, so I am probably looking for something like a six position one.