A bit pricey but if you have to do serious audio creation and editing, this might be the package
Can a free (or cheap subscription) cloud-based DAW perform well enough?
Software processor packs in a lot of tools (but can it replace a hardware processor?)
Expand program horizons with an automatic software mixer
This software is free
Several manufacturers pool their online resources into one site
The latest in the line of digital desktop mixers adds helpful features