Maybe you`ll find it somewhere else or record it yourself the way people ripped audio off their PS3 when it was unbreachable? BTW there should be AIX or even (mono) ADX in pre-RGG5 iterations, you can extract those with lots of PS2 utilities like Cube Media player or ADPCM Player 1.44h.
Take care!
edit: similarly unsuccessful with Yakuza 4. Darn .par files.
edit: wow there’s a lot of thug clips. And lots of dupes. I’ve heard this one guy say "yare yare" like 5 times now.
Update: after that last revelation, had a bright idea to switch over to searching Yakuza 5’s sound files since it had around 8,000 compared to Zero’s 23,000 (much less overall voice acting in 5). Went through about half of them and only found a few files of the main cast for things like battle taunts and drinking health items (and very few instances of actual sound effects. Only the utensil-clattering, ramen-slurping, burger-wrapper-rustling and ice-shifting noises from when you take the characters to restaurants or bars). I am going to guess the clips I want aren’t kept in the "streamed" audio data and might be in that impenetrable "sound.par" file after all. But nobody on the internet seems to have a clear idea on what .par files are. Some think it’s a different name for .psarc files but others say it’s a backup archive for the repair of other files. I’ll keep searching through the remaining files but I feel like my chances are a lot lower now.
Bye!