Recent projects, huh? I bet they contain recently-shot footage, too. Stuff from a DSLR, an HDV camera, a helmet cam, a flip cam, or perhaps a brand-new AVCHD camera?
You should know that such long-gop footage doesn't work well in your version of AE. You need to convert it to a lossless codec before you import it into AE. I like Quicktime movies in the PNG codec for that.
No - this is an animation project - I'm bringing in lossless files from photoshop. No video.
Workflow has not changed since the earlier projects, when audio preview was working just fine.
How can a Photoshop file have a quicktime movie icon? What are you doing in Photoshop?
If the audio has that goofy quicktime icon, use QT Pro or something to convert it to a proper AIFF file.
Audio is in AIFF format, and was created in the same time period and format as earlier projects, where it previewed just fine.
Photoshop files do not have the Quicktime icon, my workaround solution does.
I can get RAM audio preview working again - IF I import an additional, older AE project from a time (June 2011) when audio preview was still working as expected. I experimented with those earlier AE projects, deleting various files until I narrowed it down to the following:
As long as the imported project includes a movie file with that goofy quicktime icon, audio RAM preview works. If not, no dice. The movie file in question is a tiny quicktime movie animation generated by AfterEffects (lossless, best settings) in the course of the previous project. It has no audio of its own.
So I have a workaround, but I'm curious. Why doesn't my audio RAM preview work in current projects, and what is it about this little, goofy-icon QT movie file that gets it working again?
I don't have to actually USE the goofy-icon QT movie file in working compositions, by the way. As long as it exists as imported footage, audio RAM preview works. If I delete it from my footage window, audio RAM preview stops working.
Well, that's weird.
What happens if your audio is WAV instead of AIFF?
Also, have you updated your CS3 to the latest version?
Like Szalam sez, that's weird as all get-out.
You might want to try restoring default preferences. You'll find the techniques in the following link near the top of the page, right under all the different topics:
To preserve your existing preferences, save them first, which you can do.