Quote:
Originally Posted by Darryl Ramm
Good work, but just pull all those plugins out of your plugin folder, trash prefs and restart Pro Tools... you need to test if basic Pro Tools with only stock plugins work at all. Run the demo session... should have done that before installing anything else.
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Problem seems to be solved - WAVES Dorrough Stereo Plug-In. It was jittery during renders which were slower than the iMac. Deactivated it, and presto - simple promo mixes render at 35x, dragging audio files from the bin to the timeline is butter smooth. I picked today to do this cos it's a quiet day, I have a bunch of heavy editing coming up next week and will be able to figure out if it really is just this one plugin that was upsetting the whole machine.
My deep gratitude to everyone who gave suggestions on how to solve this!