Just wanted to add my experience (deluxe version on 360):
I didn't know there was a glitch but had thought to myself, while playing the game, that it was a shame they'd obviously cut back on party banter. I assumed they were spreading the content out over a wider area. I had heard perhaps 10 instances of banter in my 55 hour game. Now, that's a guess and could be affected by perception, but it's one of my favourite parts and when it did fire off, I'd always stop to listen to it, so I doubt I'm underestimating by that much. It was something I considered rare. I also wasn't getting consistent background music, though of course, I didn't know it.
Having tried the journal/codex/online settings, I noticed a huge, immediate improvement. I started getting regular banter, usually every 10 or so minutes (though sometimes as much as 20 mins or as few as 5) as well as background music (lasting for 30 seconds or so every 3ish minutes as others have described).
I tested the areas I had access to at that point: The Hinterlands, Storm Coast, Fallow Mire, Crestwood, Exalted Plains and Western Approach. Western Approach gave background music but no banter (again as others have experienced). All the other places gave both background music and banter. I played for about three hours, but about 40 minutes of that was in the Western Approach, which as noted, still seems broken. In the 2 hours 20 I spent in the other areas, I got 10 pieces of banter.
At this point, even if I'm wildly underestimating my previous 50+ hours there's obviously something odd going on.
Anyway, I did all that last night.
Tonight I've logged back on and played some more to see if it had stopped working. I'm pleased to report that having tested Fallow Mire and the Hinterlands, they still provide banter at regular intervals. I haven't gone more than 20 minutes without any banter and it's usually more frequent. I also just opened up Emprise du Lion and my party is very chatty.
I haven't gotten to Forbidden Oasis, Emerald Graves or the Hissing Wastes yet.
I am not getting music in Val Royeaux.
I am not getting specific combat music.
I am very sporadically getting combat dialogue. My party do make noises when they're lit on fire, etc., (and have done throughout my playthrough) but I don't generally get comments about going down or the combat itself. I've noticed a slight increase in this since the fix, but only slight. As in maybe two or three instances. I don't know if that's because of the fights I've been in or if it's because it's still somewhat glitched.
Someone mentioned they found dialogue died off after a few hours. That hasn't been happening to me, but I also haven't gamed for more than ~4 hours since applying this fix.
However, as long as this holds, I am now happy with the state of the game. I consider one non-bantery area and the loss of a few combat phrases acceptable in the way the game-wide party silence absolutely was not.
Thank you so much to all the people on this thread who worked to find a solution that is working for at least some of us.