audio editing software

[Astro]

I need to find some software (ala Sound Forge, CoolEdit, etc.) which has an option to apply effects over time. In other words something that would allow me to apply, for example, a delay which would vary in intensity from beginning to end - delay starting light and gaining in intensity over time. Better yet, something that would allow me to program continual changes over time - intensity changing throughout a piece.

It does not appear that any of the current editors I am using can do this. Does anyone know one that can?

Thanks,
Mike

[TimOBrien]

Watch for the phrase "effects automation" in the software description.

N-Track, Cubase, Sonar and most of the standard sequencer programs can do this...