ok its coming together now, the only thing i dont know is how to get the wave lenght from the fs i just dont know the formula. but from what i understand i take the wavelenght and play with 1/2-1/4-or 1/3 of that for the lenght. if you can help me there ill try this project. also can you take a look at the decware link on the first post i made on this subject. its called the wicked one and wonder if it will wreck the function if i cut it in half, i dont know if the horn will still work or not.