Function: invert(noise(mod(numbers("per"), numbers("xxr")))) if mod(numbers("per"), numbers("xxr")) if invert(noise(mod(numbers("per"), numbers("xxr")))) > noise(mod(numbers("per"), numbers("xxr"))) else band pass(invert(noise(mod(numbers("per"), numbers("xxr"))))) > noise(mod(numbers("per"), numbers("xxr"))) else band pass(invert(noise(mod(numbers("per"), numbers("xxr")))))