Caustic Song file (optional):
This tutorial will show you how to extend Caustic's "2 Insert Effect" limit. It assumes that you know the basics of Caustic and have a general understanding of the the Modular Synth and its various modules.
The tutorial is rather long and repetitive, so be forewarned. But if it gets you to try something new with FX routing and mixing in Caustic, that's what matters.
Caustic is an extremely cool and powerful music-creation app (http://singlecellsoftware.com/caustic). Once you're familiar with the interface, it becomes easy to create music quickly. One of the real gems in the instrument rack is the Modular Synth. Designed to look and function like a vintage analog hardware modular synth, it can create some truly unique, pulsing arpeggiated tones.
But it's also great for processing other tracks. By using Modular's Machine Input module, you can assign any other track as Modular's Input Source. In this tutorial, I'm simply using Modular to route the pre-fader / post-insert FX audio from another track into Modular and through its mixer channel. This allows you to add more than 2 Insert FX to a track (the original track's Insert FX plus whatever Insert FX are used on the new Modular track). The Modular "track" really isn't a new track at all, just another track's post-Insert-FX audio being routed through Modular via the Machine Input module.
The idea really isn't that complicated, but I hope it might help you view the Modular Synth as something that's very practical and not intimidating at all. When you have a better understanding of how audio can be routed within Caustic, it might help you come up with some really creative mixes that you might not have considered before. Give it a try!