Hey guys I just wanted to drop off some knowledge for the day. The difference between Audio Suite and RTAS (the plug ins you put in your inserts on your tracks if your using Pro Tools). This is a pretty important subject that I commonly see a lot of people writing off a lot. I'd say file management is priority #1 when it comes to DAW's but next on my personal list would be CPU management, to ensure everything is working properly and that your all getting the most out of your DAW's.
The difference between Audio Suite and RTAS (Real-Time Audio Suite) is this....
When applying an effect from Audio Suite what its actually doing is making a completely new audio file in your audio files folder (basically, its like you recorded another take). Although it doesn't tamper with your computer's CPU during playback, if you kept applying all your effects like this than you would run out of ROM really quickly. But as you already found, some effects are only available through Audio Suite. In this case the best way to organize your tracks would be to approach it in a manner where you would first select the track you wanted to affect the region on. Let's just use the Pitch Shift plug in (chopped n screwed effect) so my answer pertains to a commonly asked question. After you've chosen what track you want to apply Pitch Shift to, you would then go over to the left (in your Edit Window) and select to "Duplicate Playlist". This way if you want to go back to the original audio file, you won't have to search for hours on end to go back one step (Pro Tools provides only about 10ish levels of undo so if you've applied an effect through Audio Suite and made 26 adjustments after that, you won't be able to undo.... get it?)(Your basically safeguarding yourself). Then go ahead and apply the Pitch Shift effect on your region of audio on the duplicate track. Then write down what adjusts were made in the specific plug in you used in the comment box so you know exactly whats going on with the processed audio. I know its a long process but believe me, just doing these few steps will help you save a lot of unnecessary headaches in the long run.
RTAS is just the complete opposite. When you use an effect on your insert, what is going on is that the audio that is in the track that you have the effect on your insert, is being processed in real time everytime you playback. Thus Real-Time Audio Suite (RTAS). And as you probably figured out, this is the reason it use's so much CPU and RAM resources.
All in all, just step back for a minute when your deciding on how to apply effects to your audio. Just find a smart way to efficiently choose how you should apply the effect. I know you guys will make the right choices for your specific sessions. =)