Soundtrack is a new Acid-like music production application included with Final Cut Pro 4.

This month saw the first signs of Emagic's technology being used in Final Cut Pro, and we also take a look at a utility that allows OS X-compatible VST plug-ins to be converted into Audio Units.

Apple promised to unveil a 'strategic direction for digital video production technologies' at this year's National Association of Broadcasters (NAB) show in Las Vegas, and delivered on this promise by announcing major updates to its line of professional video applications: Final Cut Pro 4, Shake 3, and DVD Studio 2. Shake 3, Apple's advanced digital compositing software acquired with the purchase of Nothing Real in February 2002, now has support for AIFF and Wave files, which can be synchronised with visual effects, while DVD Studio 2 has been rewritten from the ground up to provide new features like the timeline-based track editor. But, despite many other enhancements that will benefit those working with video, one of the most interesting additions to Final Cut Pro 4 is Soundtrack, a new application for adding music to your video productions.

1. Windows VST Installer now remembers where the plug-in was initially installed to simplify upgrades. (Mac) plug-in version number is now available when using 'Get Info' in the Finder. (Mac) Improved display of Audio Unit parameters in most host applications. Bug Fixes: Fixed window frame not showing with Cubase 7.5 (32-bit) on Mac.
2. Vst To AU Adaptor V 2.0 for Mac can be downloaded from our website for free. The following version: 2.0 is the most frequently downloaded one by the program users. Our built-in antivirus checked this Mac.
3. Elemental Audio Inspectorxl VstRtas V1.0.2-blizzard: Elemental Audio Neodynium Dynamics Plugin Au VstRtas V1.0.3 Mac Osx-delirium: Fxpansion Vst To Rtas Adapter 1.01: Fxpansion Vst To Rtas Adapter V2.0 Macosx-ngen: Fxpansion Vst To Rtas Adapter V2.0-ngen: Fxpansion Vst To Rtas Adapter V2.1-air: Fxpansion Vst To Rtas Adapter.

Wide Stereo Chorus Effect Plug-in (RTAS, VST, Audio Unit, DirectX) (Freeware) Based on Blue Cat's Chorus plugin technology, Blue Cat's Stereo Chorus has the same versatility and crystal-clear sounding capabilities as its little brother, plus a subtle to very deep stereo effect feature: just play with the 'stereo' control and get this famous widening stereo chorus effect.

Soundtrack is very similar to Acid in that it allows you to produce music based on audio loops, and several thousand royalty-free instrument loops and sound effects are included to get you started — additional material can be imported from AIFF, Wave and Acid-format files. One of the the best things about Soundtrack is that, as in Acid, you can combine loops of different tempos and the application will automatically play everything back in time at the chosen tempo. Other neat tricks include special Scoring Markers to make it easy to synchronise the music and video, and a powerful search engine allowing you to search for audio clips based on various criteria.

Whether Soundtrack has benefited internally from Emagic's expertise is matter for speculation, especially since Soundtrack seems far more in line with Final Cut Pro than Logic. However, both Final Cut Pro and Soundtrack do include a selection of Emagic's effects from Logic Platinum, including SubBass, Bitcrusher and Auto Filter, which are part of over 30 bundled audio effects that are fully automatable, along with support for Audio Units plug-ins.

Wrapper Time

While Emagic might be busy adding plug-ins to Final Cut Pro, their decision not to implement VST plug-in support for Logic in OS X always provided room for an inventive programmer to come along and write what has affectionately become known as a wrapper, providing a way for OS X-compatible VST plug-ins to run as Audio Units. A wrapper is so called because it metaphorically 'wraps' its own code around the existing plug-in, creating a layer that acts as a host for the original plug-in (an OS X-compatible VST plug-in, for example) and presenting this combination to your host application in the guise of a compatible plug-in (an Audio Units plug-in, in this case). And this is exactly what Fxpansion (www.fxpansion.com) developer Angus Hewlett has created: the imaginatively named VST To Audio Units Adapter converts OS X-compatible VST plug-ins to Audio Units.

Logic for OS X — now with support for VST plug-ins. Well, almost.

It's important to stress that in order for the for the VST To Audio Units Adapter to do its thing, the VST plug-ins you're converting must already be OS X-compatible — OS 9 plug-ins, as you might expect, are not supported. The adaptor supports both Carbon CFM and Mach-O VST plug-ins under OS X, and these terms refer to the run-time architecture used by a VST plug-in. A run-time architecture is basically a set of rules that defines how a program's code is compiled and run within an operating system, specifying how actual program instructions and data are addressed. Most executable files under OS X are stored in the Mach-O file format, and files such as kernel extensions, libraries, system applications, frameworks, and so on, are all implemented as Mach-O files.

Despite the fact the Mac OS X kernel only reads Mach-O files directly, OS X itself does support other run-time architectures in order to make it easier for developers to port their applications and plug-ins to OS X. CFM (Code Fragment Manager) was the run-time architecture used for executable files in the Classic Mac OS, and so Carbon-CFM is a halfway step, allowing developers to link their Carbonised code to Mach-O. However, while Apple recommend Mach-O as the file format of choice for executables in OS X, most OS X-compatible VST plug-ins have been Carbon-CFM-based for legacy reasons, although support for Mach-O VST plug-ins is becoming more widespread. BIAS's Sound Soap, as an OS X-only VST plug-in, for example, is a Mach-O VST plug-in.

Getting back to the adaptor, Angus was kind enough to let me try out the beta versions, and although the first version of the adaptor had already been publicly released at the time of writing, a later beta version of the adaptor became available for testing just before this Apple Notes column went to press, adding support for VST plug-ins that can receive tempo information, and implementing internal handling of VST preset files, amongst other improvements.

Using VST To Audio Units Adapter

Unlike many wrappers, which need to be run from the host with a degree of user interaction, VST To Audio Units Adapter actually takes the original Audio Units file and saves out a new version as a dedicated VST plug-in, so your VST plug-ins appear in the Audio Units host as if they were any other Audio Units plug-in. The conversion process itself couldn't be simpler: just run VST-AU Adapter Configuration Utility and click the 'Detect and convert VST plug-ins' button. The utility will automatically scan your global and user-specific VST plug-in folders (in addition to a local VST plug-ins folder inside the utility's own folder) looking for suitable Carbon-CFM and Mach-O VST plug-ins, and save out converted Audio Units plug-ins to either your global or user Audio Units folder, depending on the Options you've set in the utility's main window.

VST-AU Configuration Utility is used to convert your existing VST plug-ins into Audio Units.

Once the conversion process has been carried out, all of the successfully converted VST plug-ins will be available as Audio Units the next time you run an Audio Units host, such as Logic Audio, Digital Performer 4, and so on. I was using Logic 6, which is one of two versions recommended by Fxpansion (the other being 5.3) because there's an issue with Logic 5.5 where the graphical interface of the plug-in doesn't receive mouse clicks correctly, although this is apparently a Logic issue, rather than a side-effect of the conversion.

I tested a variety of free and commercial instrument and effects VST plug-ins, and most worked exactly as you'd imagine them to, including Rob Papen's Albino synth, and other Linplug instruments. Fxpansion themselves have successfully tested the adaptor with plug-ins from AAS, Antares, Arturia, Bitheadz, Bitshift Audio, Destroyfx, Digital Fish Phones, DMI, Dsound, Elemental Audio, Gmedia, Green Oak, INA-GRM, LinPlug, MDA, Ohm Force, Prosoniq, PSP, reFX, Silverspike, Spectrasonics, Steinberg, Swar Systems, Synapse Audio, TC Works, Waldorf, Waves, and Yellow Tools. Quite a list, I think you'll agree, and the latest beta offers improved support for some of the more awkward Steinberg plug-ins, such as Virtual Guitarist, Groove Agent and Halion String Player, although I personally had some troubles getting Virtual Guitarist Electric Edition to work.

In terms of CPU overheads, Fxpansion claim that the wrapper code added to a VST plug-in requires less than 0.1 percent of CPU resources for each instance used on a 550MHz PowerBook G4, so I don't think performance is going to be an issue, even for those with the most modest of systems.

Audio Vst Plugins Free

There's no doubt that VST To Audio Units Adapter is a very clever piece of coding, and while it's going to be hard to engineer something that's 100 percent compatible with every OS X plug-in, Fxpansion seem to have done an amazing job with this much-needed solution for Logic users, in particular, who are missing their VST plug-ins. VST To Audio Units Adapter is available now directly from Fxpansion's site (www.fxpansion.com) and costs $75.

Apple Updates

Not content with the fairly major updates announced at NAB, Apple have also been busy releasing Mac OS 10.2.5, a second Safari public beta, and speed-bumped iBooks. The first of these updates, Mac OS 10.2.5, is now available as an updater for 10.2.4 users and a 'combo' updater for 10.2.x users, as per normal, and these can be downloaded from Apple's web site or via Software Update.

Many Mac users, myself included, were excited by the 'Apple does a web browser' announcement of Safari and the first public beta release; but many Mac users, myself included, later went back to Chimera, Camino, or whatever it's called this month, due to the lack of tabbed browsing and automatically form-filling features. However, with the release of the second public beta of Safari, both of these features are now included, along with the ability to import Navigator and Mozilla bookmarks and improved AppleScript support. Safari now seems like a real option for serious web browsing and there are significantly fewer pages being displayed incorrectly in this latest release — it's become my browser of choice in the SOS office. Visit www.apple.com/safari for more information.

And, last but not least, Apple speed-bumped the iBook range of consumer notebooks, which now feature faster 800 or 900 MHz G3 processors. Many Apple observers are speculating that this could signal the final chapter for the iBook in its current form, and it's possible we could see completely new iBooks later in this, Apple's year of the notebook.

Vst Audio Driver

VST plug-ins running in Pro Tools, thanks to FXpansion's adaptor.

As the name suggests, FXpansion's utility allows VST effects and Instruments to be used in Pro Tools, but how well does it really work?

Both Pro Tools LE and TDM systems use Digidesign's proprietary RTAS (Real-Time Audiosuite) format for host-based plug-ins. While this supposedly keeps Pro Tools ' mixing environment within Digidesign's sphere of influence, it has limited the range of virtual effects and instruments available to Pro Tools users. The situation has been improved by Rewire support, as well as Native Instruments' adoption of RTAS, but there is still a great number of VST-format plug-ins (many free) that we've missed out on. It seems quite hard to believe, but FXpansion's VST To RTAS Adapter can take VST effect and Instrument plug-ins and alter them so that they work as RTAS versions. (They also have a VST To Audio Units Adapter, for OS X users of Logic who want to incorporate VST plug-ins.)

What FXpansion's adaptor does is 'wrap' the plug-ins in an extra layer of code that mediates between Pro Tools and the plug-in, making the plug-in appear to Pro Tools as if it was in the RTAS format. This 'wrapping' takes place off-line, using a configuration application, and once it's complete, FXpansion claim that the adaptor code uses next to no CPU power, so the plug-ins should be nearly as efficient as in a native VST host like Cubase. No extra background programs have to be running when you use the converted plug-ins — they just appear in Pro Tools alongside your existing effects.

VST plug-ins are converted prior to use with the Configuration Utility.Installation creates a folder containing the VstRtasConfigure utility and a local VST plug-ins folder. The Configure application scans your computer for VST plug-ins, creates the 'wrapped' versions and places these in your Pro Tools Plug-ins folder. Even with a large number of plug-ins this only takes a few seconds. After this, you only need to use the utility when you add new plug-ins, or wish to remove them all. The important option in VstRtasConfigure is the 'Scan only local VST plug-ins' toggle. While the utility can scan your whole computer and convert any VST plug-ins it finds, it's highly recommended that you copy the ones you wish to use into the local folder. The best method is to convert in small batches rather than all at once. The reason for this is that some plug-ins are not going to work, and introducing a small number at a time makes it much easier to weed out problematic ones.

After the configuration program has finished, all that remains is to quit it and launch Pro Tools. Converted plug-ins appear in the normal RTAS plug-in list, available at insert points in audio tracks, and also aux inputs on LE systems. Adapted plug-ins are to easy to differentiate from the others as their names appear with the prefix 'VSTW', which tends to clump them at the bottom of the list. Pick a plug-in, and hold your breath. With any luck the plug-in will pop up looking for all the world like it's perfectly at home in Pro Tools. As well as having full use of Pro Tools ' standard Save and Load preset functionality, the VST preset system is available at the bottom of the plug-in window. Automation is also implemented.

In Practice

Now you're probably thinking there must be a catch with all this, right? Well, that depends on your expectations. There is a certain amount of uncertainty in using the adaptor (as you might expect), which means that you need to approach it with a willingness to get your hands dirty, and without expecting it to work with everything. There are certain technical differences between the RTAS and VST formats that are hard to reconcile, such as RTAS's lack of support for multiple outputs from a virtual instrument. Also, the huge range of possible system configurations and plug-ins makes testing difficult, especially for a relatively small independent software house like FXpansion. Taking all this into account, I set aside some time to install a range of effects and instruments, a few at a time, and get a feel for what can be expected. I downloaded around 40 free and demo plug-ins to add to my own. You can see a summary of my results in the 'Tested Plug-ins' box below.

Adapted plug-ins appear in the standard plug-in list with the prefix 'VSTW'.To begin with I was using an Apple iBook 800, running OS 10.2.8 with Pro Tools 6.1 and a Digidesign M Box, and had about a 50 percent success rate. This, I later learned, was an unusually poor result caused mainly by my Mac. Even so, many VST Instruments worked fine, including some large and demanding ones such as Gmedia's Oddity and ImpOSCar. Internal MIDI functionality worked fine, with the plug-in instruments automatically seen as destinations in MIDI tracks. One thing that didn't work in this configuration was tempo sync with Pro Tools ' timeline, though this turned out to be one of the things that improved when I updated to Pro Tools 6.2.2 (see below).

Failures tended to fall into two categories. Some plug-ins, such as Bitshift Audio's Phatmatik Pro and Linplug's RMIV, would crash immediately upon loading (or shortly thereafter). A number of other plug-ins appeared stable, but had graphics problems that rendered them unusable. This category included the huge MDA collection of free effects. Strangely, these plug-ins had worked with an earlier beta version of the adaptor that I'd been testing, so I suspected something was amiss. FXpansion suggested that I really ought to be running Panther (OS 10.3) and Pro Tools 6.2x, even though the published requirements are OS 10.2 and any version of PT 6 — and after dutifully upgrading, most of the problems I had did indeed disappear.

It actually turns out that some minor filing system corruptions on my hard drive had been preventing the FXpansion installer from installing some supporting files, causing my graphics problems. Unfortunately, instruments that had caused crashes like RMIV were no better after the upgrade, and obviously fall into the category of stuff that's just not compatible at the moment. However, everything was suddenly faster, more stable, tempo sync started working, and my success rate was up to at least 80 percent. Also on the positive side, FXpansion can be seen to be actively involved with the on-line user forum, and if a particular incompatible plug-in is popularly requested there's a good chance that they will look into updating the adaptor to accommodate it.

Tested Plug-ins

Performance And Limitations

VST plug-in performance tends to vary widely even in native environments due to differences in programming quality, so it's difficult to judge how transparently VST To RTAS Adapter does its work. Testing with the ImpOSCar and Novation V-Station instruments, performance was only marginally weaker in Pro Tools compared with using unwrapped versions of the plug-ins in Cubase SX, and to be frank I'm tempted to put this slight difference down to Pro Tools 6 LE itself, which seems to struggle a lot on less-than-cutting-edge systems.

Inevitably, there are glitches here and there. Although upgrading to PT 6.2.2 got tempo sync working in most plug-ins, it was still a bit flaky in others such as PSP42. My review version (1.02) had a bug where automation would only get played back for plug-ins whose window was open. I'm assured this is now fixed in version 1.04, which came out as the review was to be filed. Other points conceded by FXpansion are lack of support for control surfaces such as Digi 002, no delay compensation, and the performance limitations imposed by RTAS's fixed 32-sample buffers. However, Pro Tools LE does have plug-in delay compensation up to a point, and this worked perfectly with wrapped plug-ins on my system. I also suffered no worse audio break-up problems with Pro Tools than with Cubase, so the small buffers don't seem to be an issue even with very demanding instruments. One issue I did encounter with the CM instruments was that the sound would cut out while adjusting on-screen controls. Apparently this can be a symptom of low CPU power, although I didn't have this problem with any other plug-ins.

An exciting development in recent versions, which is enjoying continued special development, is compatibility with certain DSP hardware products. Incredibly, the adaptor can wrap plug-ins that work with TC Electronic's Powercore and Universal Audio's UAD1, allowing you to use these DSP-accelerated plug-ins in Pro Tools, which must be ruffling a few feathers at Digi HQ! DSP support is at a preliminary stage, and the performance is not as good as when using these plug-ins in their native environments, but early reports sound encouraging. There is the problem of latency in these systems which Pro Tools can't adjust for automatically, but it can at least report the delay time (as with TDM plug-ins), allowing you to nudge audio to compensate.

Conclusions

Technically, VST To RTAS Adapter is quite an achievement, and politically is one up for the consumer (remember, those people who fund the industry) against the large manufacturers' format wars. If my tested plug-in list is anything to go by, the adaptor works with the majority of VST plug-ins out there. Where it does work it's remarkably transparent, doing all the things you'd expect from a real RTAS plug-in. There are plug-ins that just don't work, so if you are thinking of buying the adaptor in order to use something specific, you should check out the compatibility first. The best place to do this is the online FXpansion forum at www.kvr-vst.com.

There are other things you should consider before making up your mind. You should expect a certain amount of tweaking and experimentation to get a stable working system. I went through my share of crashes in the early stages, including several occasions where I had to strip out all Pro Tools ' settings files to get up and running again. You need to be prepared for this possibility. Also, the fact that you are introducing potentially unstable third-party plug-ins into the system means you should think twice before installing this stuff in critical situations such as professional recording or mixing sessions. However, for writing, sound design or home Pro Tools studios it really is worth any inconvenience. With all the free instruments and effects VST To RTAS Adapter makes available, I can't think of another way you could spend this little money and get so much extra gear.

Pros

• Brings hundreds of effects and instruments to Pro Tools, including many free ones.
• Non-intrusive and highly integrated inclusion of VST plug-ins in the Pro Tools environment.
• Practically no performance overhead above that of the plug-in.
• Compatible with UAD1 and Powercore DSP effects.
• Great value for money.

Cons

• Any problems will require some technical ability to resolve.
• Can be unpredictable, so not suitable for critical situations.
• May not work with your favourite plug-in.

Summary

Successfully converts most VST and VSTi plug-ins into working RTAS versions, opening up a whole new world of goodies to Pro Tools users. While it doesn't work with everything, and needs some technical competence to manage, you get big rewards for your efforts.

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