Each clip in the effects or music track can have it's own volume level as well as fade in/out settings.
These settings are fixed, based on the clip and not frame position.
CTA does not provide adjusting volume based on frame position.
That can be done post production using an NLE video editor..
Jeff
Get my Plugin Manager and TaskNotes plugins for iClone.
Check out EZColors and Other products for CTA/CA. EZColors: the easy way to change Render Styled (RS) colors!
See my CTA Tutorials on the YouTube channel CTAStepByStep