UPDATE:
For those of you that preferred the sound of this radio filter over the one provided in-game, I have uploaded the remnants of Starscre4M's old addon onto the workshop, packaged together with edits that differentiate between maskless and masked grunts, and updated HECU voice lines from newer builds of the game.

You can find the mod here: https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2277759591

i wish somebody did a mod that added mics to the maskless grunts, it would fit perfectly with this

sounds like Mike from civil protection xD

allready done those in a re-skin addon

I forgot why I installed this addon...

ok

@Killer Muffin:
Huh. The first mod (by Starscre4m) should still be working. It's working for me so far. I'm not the owner of that mod, so there's nothing I can really do, but I'll try to look into it.

could you please fix the first HECU voice filter mod please if you ask me this mods kinda worthless I mean why just this scene in Black mesa.

@Bim:
The map seen in the video is a part of the most recent update to Black Mesa which restores a few cut maps for Surface Tension to the game. This map is the second to last map before Forget About Freeman.

Wait where was this int he game

Alright; thanks for checking!

@Master of Time:
Just checked the game. Mods are still functional on my end.

I think there was recently a second patch. I hope that didn't break it...

@TooManyMeeps:
As far as I'm concerned, there has only been one patch since the May update, which means that this mod, as well as the first HECU radio filter mod, should be functioning properly.

This map is a part of the Surface Tension Update that shipped in May.
If it's not showing up for you, trying heading to your games section, then checking Black Mesa's properties. The update (or the patch, I believe) included the ability to rollback the game to the Crossfire update with the BETA tab. Head over there, and set the tab (if it's not already) to "none."
This might be your problem, but I'm not entirely sure.

Is this a new map?
I didn't see it while playing it a while ago.

The map is the second to last map of Surface Tension. You can access it in the console by typing in "map bm_c2a5h."

What is the map called in the video?

The lines have been updated - again. Some voice lines that accidentally had a radio filter (the voice of the grunts) have now been substituted with other agrunt voice files. The same goes for other sounds.
Now that it sounds better, I'll probably add this into the main package.

They would probably only use walkie-talkie things in loud enviornments, like helicopter headsets.
Makes sense for a warzone, and would probably makes things more authentic if they had more gear. They are the 'Harzardous Environment Combat Unit', and going into a place like Black Mesa would probably need some serious protection and tech.

@Bakka [burke]:
Ah, I see. Sorry about that! Not the best at determining whether or not a text comment is an actual complaint or a joke, haha.
And yeah, I agree somewhat. Mainly because I know bugger all about how the military uses their equipment. Based off of what's seen in Half-Life, I think they're actually using walkie talkies?
Still, the filter makes them sound more intimidating to me. One of the best characteristics of the HECU for me.

I'm just joking, the radio filter doesn't make sense for the soldier men not wearing any facial protection and a voice coming through a radio is less clear than from the source itself.

I don't really care either way, sounds cool too.

@Bakka [burke]: Is this a complaint about the mod, or...?

If it's about the sound, I'm not exactly the best at creating a neato-sounding radio filter effect, and I wanted to make it so that it fell in line with the other radio filter addon.

If it's about the fact that all soldiers have a radio filter, there's really nothing I can do about that. Black Mesa only has one set of voice files for the soldiers to use, and I'm not really aware of any way to make it so that it uses both the files without a filter, and files with the filter.

Looks like the HECU executive-people have rolled out mandatory "voice shitifiers".
Like what the fuck, not all of them are wearing masks.

hmmmm, try make your better with "The scene involving an HECU Marine being thrown through the wall by an Alien Grunt was not updated, as that clip itself is an entire soundfile. I am not an expert in editing sound files, and was unable to find a way to update the soldier's voice without affecting the sound file as a whole." :P i guess you can!

I've updated the description to include a link to the VPK directly for those that are having trouble with the mod.

HECU Radio voice filter, don't work, any help?

@TIRED SQUID: I'd really only be able to replace the current sound files with the ones from the legacy version, since I'm not all that familiar with scripting, but try to look into it!

I think it's possible, if we make a new script for each map or replace, because there is that part where the mariners catch fire due to gargantua and the old version they do not scream, they call the doctor; the good thing of all this is that there are audio files that have not been used and that we can put to make more realistic scenes(like this http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=609172463) , I love the mariners of the old version!

i think the 2012 mods hasn't voice files for Surface Tension, but you can use the old version of Surface Tension Uncut and extract the exclusive HECU voice lines to use in steam version

@STEVEN: Video is going up soon. Didn't get the chance to record a preview initially since I uploaded this late at night.

@TIRED SQUID: I'd have to redownload the 2012 mod to get the files, I believe, but I'll try it out.

video pls

ok, can you create one, with LEGACY(old) marine voices of Black Mesa 2012 launch?

YESSSS! Thank you so much.