Ted, sorry for the stupid question, but have you used the arduino IDE before?
Looking at your last post I've got a feeling that you know programming but not how to use the arduino IDE.
Also you should look at the examples for how to used the IOs on your arduino board. what IO are you referring to with "1"
in the code you posted the for loop is the infinite loop. did you try putting the contents of the for loop in to void loop routine(that's your infinite loop in the IDE)? (I assume yes and that's wen you got those errors)
one more thing, how do you want to view the output of your bandpass filter? Serial monitor? an output to another IO?
lastly to be clear, you ARE trying to code using Arduino IDE?