Simplest way for me is to cheat with a third-party app/plugin.
I host the plugins in bidule.
I.E. Host bidule in any VST2/VST3/AU/AAX/CLAP instrument or mixer slot(s) I like. Host any plugins that I’d like to ‘merge together’ into what I’ll call a ‘super instrument’ inside bidule.
Each bidule instance in turn registers hundreds of generic unlinked parameters to the DAW (In Cubase they can become Automation Lanes). I can then link them to whatever I like that is hosted inside any instance of bidule running in the session. Whatever is hosted in bidule can then be automated via DAW VST lanes, via MIDI CC, OSC, whatever…
Yes, it can even link together parameters between Mixer Effect slots and Instruments in the rack. I.E. a bidule instance running in a mixer slot could manipulate parameters of plugins running in a bidule instance in the instrument rack, or vice versa. You could snoop information from the audio streams, MIDI streams, and more, and use that to build up booleen style conditions for automatically applying yet more logic to automate pretty much anything you like running in a bidule instance somewhere (direct VST if it’s all in the same host, but also possible over OSC or Virtual ports if you want to drive bidules running in other hosts, or even on other systems on your LAN).
It can do a good bit more than behave as a plugin chainer. Can also be a stand-alone host. Has built in OSC server/clients. Plenty of real-time MIDI and Audio generation/transformation tools in the box.
I call it my ‘Swiss Army Knife’ plugin. Been using it for years to trouble-shoot and diagnose, sound design, and bolt never had it, and probably never will features onto a number of hosts and DAW scenarios.
Best money I’ve ever spent on what I’d consider a utility plugin. It’s really way more than that (can build full blown synths and samplers, event generators, custom effects, and more); but, I personally use it the most as a kind of super chainer, and data sharing ‘merger/transformer’ app.
Many of the features just now coming to Cubase 14 (modulating paramters with tempo locked LFO patterns and whatnot), been bolting on with bidule since the Cubase 7 days.
Over time, it lends me the ability to have some really interesting and highly portable instrument templates that’ll work more or less universally in whatever host(s) I choose. It can also be treated and used kind of like audio-gridder or VE Pro servers if you have that need.
Another thing I’ve often appreciated about bidule…
Ever had a need to be able to add new plugins while the transport is going without getting a nasty ‘glitch’ in the monitors? I do have some performance scenarios where I need this ability, and as long as I add/remove stuff from inside a bidule instance, I can tweak/add/change plugin chains and crossfade among them all day while the project is playing and not suffer glitches.
As a live host on its own, it’s pretty cool too. Even managed to chain together 16 instances of stuff like Opus or Zenology plugins (neither plugin has native support for PC changes, but with Bidule I can bind a parameter to a list of saved VSTpresets) and mash together a player that conforms to General MIDI protocols (call up the proper instruments with PC events, and drive a shared/parallel reverb and chorus effect chain).
Nice and ‘snoopy’! Need that ASIO sample count? I did to truly ‘sync’ some wave files with Dorico’s transport. Dorico doesn’t have a proper audio track yet, but with a bidule instance in the rack, or on the mains in the mixer, I can lock audio files of any size/length I like so it syncs perfectly with the host based on ASIO sample count. Pretty cool stuff. So, while everyone else is still waiting for a proper audio track for Dorico, and can kind of hack in ONE track using the video player…I’ve managed to lean on a bidule instance to sync up as many audo tracks as I like since Dorico v1. Can also easily bounce staves down to pure-audio and disable processor intensive plugins if I find myself running out of computing resources but still need ‘more staves’ in the score.
I could write a small book on all the improv moments I’ve found bidule to be very helpful. It’s rare I’d hop on a forum like this and plug for a particular product or piece of software. This one is different. I use it that much!