Just noticing that the audio spectrum settings reset them selves when going to a different tab. I.E. I set them the way I want them in the layer effects. Go to set them in composition effects and come back to layer effects only to find the settings in layer effects have been reset.
Are you talking about the L, M and H setting of the external audio FFT? I just tried to recreate this, and it seems to work fine on this end. Maybe I'm misunderstanding your question?