specs:
q6600 2.4ghz oc'ed 2.8ghz
6gb ddr2 ram
geforce gtx 560ti

Play setting: Ultra (disabled ubersampling) avg 55-60fps

The game plays just fine for the 30 minutes, but then afterward all the cutscenes have choppy framerate with cracking slowed audio. The game outside of cutscenes run just fine, but whenever dialog or cutscene starts the problem occurs.

I have beta drivers 275.27 installed with removed 3d vision drivers.

I have realtek audio with up to date drivers.

Tried other games, crysis 2, da2, mafia 2, metro 2033, no other game is causing this issue

PLEASE HELP!!!!

I have realtek audio too, and the first animated cutscene did stutter, but the ones after that haven't so far.

you might have a memory leak in game it happens so wait for the patch next week

Me too. But just the firs "Cartoonish" animated cutscene stutter like hell. I Try also on another PC with different hardware and it's the same, so it's not a Driver/Hw problem.

I had the crackling on the Rivia pogram flashback (which seems to be the main flashback that causes problems) on my first playthrough. No stuttering at all when I did my second playthrough and had that same flashback. No idea what could have changed in between. ;p

It's so strange...i could reproduce it every time loadind one or more previous saves...Hope it fix magically on my pc ( :p ) or get fixed if it's a real issue.

Yes, that's the one that does it on mine, too, during the prologue when Roche is talking about his little file. (it's so hard to say something without saying anything, sometimes)

have you tried disabling SSAO too and/or lowering the resolution?

Yes, i've practically tried disabling everything.

This problem is still here, even after the patch. It is that one cartoonish cutscene in the prologue.

Hi,
I have exactly the same problem!
I got relatively good FPS ~35-45, everything is fine and smooth, but when it comes to conversation or cutscenes, the FPS decrease to 15-20 and the sound becomes slow and starts cracking. If i pause the game during a cutscene, press ALT-TAB (go back to the windows desktop), and then switch back to the game immediately, my FPS rises back to normal, and the sound problems disappears too.. but this works for that single conversation or cutscene. As soon as i continue playing and encounter another cutscene i have to ALT-TAB again, since the problem appears again.

I have 1.1 patch installed
Ive got a GTX460 with the latest beta NV driver
i have 3D vision driver uninstalled
got the latest 2.60 Realtek driver for my mb soundcard
and i have disabled SSAO / AA / and UberSampling

I have no idea how to fix this problem, its really annoying and no one has a clue why this is happening.