Help jit.xfade & image layering

Hello all,

I'm still relatively novice in Max, so I apologize in advanced for my confusion.
I'm trying to put together a layered image using .png transparencies that are triggered by pitch. Essentially, whenever a low pitch it detected, a specific set of images with fade in and out on top of a static (unchanging) base image; conversely, any high pitches will trigger another set of images that also fade on top of the static image. I've managed to fade two image together using jit.xfade, but I'm not sure how to go about fading in multiple images together in one, as well as having that static image in the background that remains unaffected by the pitch changes.

Any suggestions as to how I can accomplish this? I'd appreciate some visual help if possible. Thanks!