There are plenty of nice free and commercial VST plugins available only for Win. As probably most of you already know, they might be used in your OS X DAW with Wine (JackWASIO, VFX). Or with a virtual machine (VirtualBox, Fusion). Or a networked Win machine.. I've thoroughly tested every single one of these options only to end in disappointment. Initially this post was all about painstakingly setting up a wrapper called wacvst.
But instead of refining and updating the wacvst post as intended, I finally came to a more decent conclusion. Actually bringing back a three years old idea of mine and improving it so I can share it with you, would be the only way to go in using the smoothest and easiest to setup method of having Win VST plugins in the mix as well.
Prepared and tested on a fresh 10.6.8 install. It should work with Lion and ML as well but functionality with 10.7.x/10.8.x needs to be confirmed by users first, so any Lion/ML related issues are not the subject of this post. Please take note that functionality with various DAWs is also something I won't cover and discuss apart from generic guidelines. It should work with any DAW and it's up to you how you set it up. And I won't discuss any stuff that's already covered in this tutorial so please read it thoroughly before asking any questions.
Patience is your best friend. In reading thoroughly that is, not in the actual time it takes to set this up which shouldn't be more than half an hour at most. So what might look confusing at first will reveal itself to you as you go along as being easy as pie and I'm confident you will be happy with the outcome. Let's get started:
plugwire (my Wineskin setup including the energyXT 1.4.1 VST plugin demo)
AudioPort Universal (AudioPort AU plugin and AudioPort Host, download the trial)
Wormhole2 (Wormhole2 AU plugin, download the osx binaries)
Juce Plug-in Host (AU host to quickly test plugwire, download PluginHost.dmg)
quicktest (to quickly load in Juce Plug-in Host)
Double-click to unpack AudioPort Universal, then unpack AudioPort Plug-in Setup MAC and install it. Unpack Wormhole2 and put Wormhole2.component in /Library/Audio/Plug-Ins/Components.
Mount plugwire.dmg and drag the plugwire folder to Applications. Start the plugwire app then click Install Software/Choose Setup Executable and choose the AudioPort Host msi package. Install it, click OK in the Choose Executable window that pops up then Quit.
Quick test in Juce Plug-in Host:
Start plugwire and enter the key provided with the AudioPort Universal package. AudioPort Host should now be running.
Mount PluginHost.dmg and drag to Applications. Start PluginHost, go to "Options/Change the audio device settings" to configure your audio, then scan your AU plugins as shown on the left. Besides the default Apple AU plugins and others you might have installed, Wormhole and AudioPort should show up in the list.
File/Open plugwire.filtergraph provided in quicktest.zip, double-click on AUAudioFilePlayer module, load some audio file, check Loop, click the Play button and leave that window open.
Double-click on both AudioPort modules and click Connect. You should be connected now to AudioPort Host and in the AudioPort Host window the "File/Open recent file" option should be available, load the default plugwire project then double-click on the energyXT module.
You should hear now your audio file and on the second channel you can also play some keys along with it if you have a controller active. If not, just focus on the Juce Plug-in Host window and play some keys on your computer keyboard.
Now for the most important part, using Win VST plugins, just click on the "1" button to load them as you see on the right.
Before getting to the real business of using plugwire with your DAW, I strongly suggest to try to understand how this whole setup works based on the quick demonstration with Juce Plug-in Host. You can close now plugwire from the plugwire menu on the top left of your screen: plugwire/Quit.
Installing plugins:
In the plugwire folder in Applications you will find the "Install plugin tool" for those with an installer. Just follow the same procedure described earlier for installing AudioPort Host. Then there's the VSTplugins subfolder where you should copy those without an installer. Some installers will place manuals in the Documents subfolder.
Setting it up with your DAW:
On a track you want to process consider the Wormhole2 AU and AudioPort AU plugins as the IN and OUT pair of an insert unit, as you can see in the Juce Plug-In Host window from the main screenshot of this post. The actual insert unit is one channel in plugwire on which you load Win VST plugins.
Wormhole2 AU sends audio to plugwire using streaming over network and AudioPort AU fetches the processed audio from plugwire in the same manner. Obviously there's no actual streaming over a physical network, but the concept is exactly what makes my setup completely different from any other solution out there in that we can use simultaneously 16 independent plugwire stereo channels.
Very importantly the first thing to do before starting plugwire is load a pair of Wormhole2 AU and AudioPort AU on every track you want to process.
(However, unless you need to process more tracks it won't matter in which order you start your DAW and plugwire if you already have saved projects to load).
Now you can start plugwire then in your DAW connect to 127.0.0.1 all the AudioPort AU instances you've loaded making sure you start with selecting channel 1+2 as in the screencap then choose for each the next unused channel from the list of channels.