Can be unpredictable, so not suitable for critical situations.Any problems will require some technical ability to resolve.Compatible with UAD1 and Powercore DSP effects.Practically no performance overhead above that of the plug-in.Non-intrusive and highly integrated inclusion of VST plug-ins in the Pro Tools environment.Brings hundreds of effects and instruments to Pro Tools, including many free ones.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. However, for writing, sound design or home Pro Tools studios it really is worth any inconvenience. 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. You need to be prepared for this possibility. 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 should expect a certain amount of tweaking and experimentation to get a stable working system. There are other things you should consider before making up your mind.

Apparently this can be a symptom of low CPU power, although I didn't have this problem with any other plug-ins. One issue I did encounter with the CM instruments was that the sound would cut out while adjusting on-screen controls. 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. 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. 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. I'm assured this is now fixed in version 1.04, which came out as the review was to be filed.

My review version (1.02) had a bug where automation would only get played back for plug-ins whose window was open. 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. Inevitably, there are glitches here and there.

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