Missing dialogues in DLCs

Hi, I'm having some troubles with the DLCs I installed for Dragon Age 2. A couple of days ago I got Mark of The Assassin, Legacy and The Exiled Prince from Origin (which is also where I downloaded Dragon Age 2 from). The installation went fine, I could see the mementos in my house and everything, and, as for The Exiled Prince, I could talk to Sebastian with no troubles, at least until he and Hawke were in the Chantry. Troubles started as soon as I started the quest "Repentance": once I got into the Harimann's Estate, dialogues went missing. I could still hear party banters and combat dialogue, but all the other characters appearing inside the house were mute (as well as Sebastian's and Hawke's dialogues). I could still see subtitles and choose dialogue options, but... no voices, no speaking animations, nothing. Music and ambient sounds were just fine.

I thought it was just a problem with that particular quest, but just to be sure, I decided to try out Legacy as well, just to see if there were other similar problems. Things turned out to be even worse in that DLC: again, I could enter the new locations, see subtitles, choose dialogue options... but dialogues were missing. This time, there weren't even party banters. Haven't tried Mark of The Assassin yet.

I'm from Italy, so I'm playing an Italian version of the game (English audio/Italian subtitles). The rest of the game works just fine, no audio problems or anything similar.

Here are my system specs:

OS: Windows 7 Home Premium 64 bit (6.1, build 7601)

Producer: Hewlett-Packard

Product model: h9-1200el

BIOS: Ver: FOR_714.rom vFOR7.14

Processor: Intel(R) Core(TM) i7-3770K CPU @3.50GHz (8 CPUs), -3.5GHz

Memory: 12288MB RAM

HD: 2 TB

DirectX: DirectX 11

Graphics Card: AMD Radeon HD 7770 Series - updated to the most recent driver

Chip: AMD Radeon Graphics Processor (0x683D)

Audio: IDT High Definition Audio - Integrated - last updated March 30th 2012

I should also point out that when I installed the DLCs first I had some mods installed: no intro, some skins, hairs and a few additional face presets. I thought I may have corrupted something for not removing the mods first, but the problem persisted even after I uninstalled the game (from Origins) and re-installed it without mods. I also tried the various fixes suggested around (force Stereo Audio, check for Voice Over options in the DragonAge.ini file -which are enabled). No result. Tried a game repair... and again, no result. Contacted a Game Advisor in live chat here at the EA site, and he suggested me to write about my issue here.

So... is there any solution to the problem? As far as I could see, usually Dragon Age 2 audio problems affect the whole game, not just some parts of it, so I couldn't really find anything more to fix the whole thing. It's not that the game is completely unplayable as it is right now, but still... dialogues are one of my favourite things in Dragon Age, and I find it kinda sad to play the DLCs on silent mode D:

Also, not sure if this is a problem, but I thought I might point it out as well: while checking the talktables files inside my Dragon Age II/addins/da2_prc_drk/core/data/talktables and /da2_prc_eye/core/data/talktables (which I think are the files for Legacy and Mark of The Assassins), I found out that I seem to have three files:

1. da2_prc_drk_c_it-it.tlk

2: da2_prc_drk_c_it-it_f.tlk

3. da2_prc_drk_c_ja-jp.tlk

...which I think means I got some files for a japanese version? The Exiled Prince folder (da2_prc_seb) seem to contain only the it-it files inside the talktables folder, instead.

I'll admit, I'm not too sure if this means anything (and I hope my explanation wasn't too confusing!), but I thought I'd mention it anyway.