Unused Audio

This is a sub-page of Metroid Prime 4: Beyond.

This needs some investigation. Discuss ideas and findings on the talk page. Specifically: This should be most of the unused audio, but there's still some more digging to be done: See if there's any unused sound effects, ambience, or other unused music. While it's probably safe to assume that most of the subtitled audio is used, it would be better to actually double-check and ensure that none of it is unused.

Unused Music#

UniverseRoom.pak contains unused songs from previous Metroid Prime games, most of which were likely meant to be unlocked for the Vi-O-La radio after scanning the "Samus and Vi-O-La" amiibo (the sole exception being "General Inter-World Elevator" from Prime 1, which was presumably a placeholder for the remake used in Great Mines). In the final game, the only song from a previous Prime game to be unlocked like this is the Prime 1 menu theme. Interestingly, the tracks for both "Bryyo Seed Boss" and "Berserker Lord" appear to be alternate mixes unique to Prime 4, which could indicate that they were fairly close to being used in the final game.

General Audio#

Placeholder Voices#

Please elaborate. Having more detail is always a good thing. Specifically: Which specific paks are these files in?

Several paks contain text-to-speech voices saying "small", "medium", "large", and occasionally "griever react", all of which are almost certainly placeholder reactions.

Prerendered Cutscene Dialogue Tracks#

Many of the prerendered cutscenes with voice acting have audio tracks containing what appears to be a rough edit of the cutscene's dialogue. This is probably due to a quirk in how the cutscene engine handles audio, since in-engine cutscenes have separate tracks for voices and sound effects while the prerendered cutscenes have the voices and sound effects baked into the video file. To avoid the potential issues of the prerendered cutscenes having one less audio track than expected, these odd files are likely used as a "voice" track that gets muted immediately, while the baked-in audio is treated as a sound effect track instead. Since all of these odd tracks are for cutscenes that have subtitles shown in-game, the game may link the way that subtitles are displayed for cutscenes with the existence of a dialogue track for said cutscene.

Interestingly, several of these tracks seem to have been made before audio effects were applied to the voices, which causes several characters (most notably VUE) to sound very different than they do in-game. Some cutscenes also have very long silences before certain pieces of dialogue, this is due to these tracks only containing the cutscenes' dialogue, meaning that there are no sound effects or music in these files. Please note that none of these cutscenes have proper titles (the next-closest thing would be the internal label used for each cutscene's corresponding subtitles); as such, the titles listed below are unofficial descriptors and may not be accurate to what each cutscene's "official" title actually is.

This needs some investigation. Discuss ideas and findings on the talk page. Specifically: Should these "Last Lamorn" dialogue tracks be uploaded? While identical, the tracks in FrontEnd.pak and the tracks used in the game are technically treated as different files.

In addition to the above-mentioned dialogue tracks, FrontEnd.pak has seven pre-rendered "Last Lamorn" cutscenes that each have an associated unused dialogue track. However, these cutscenes are all rendered in-engine when they first play in-game, and the dialogue tracks used there are exactly the same as the cutscenes' "unused" tracks in FrontEnd.pak (right down to the file names, in fact). Since these "unused" dialogue tracks are identical copies of each cutscene's used dialogue track, they will not be documented here for the time being.

DuplicateData.pak#

9ea40a6c-049a-4e1e-9e1b-5357ba02dd5d.dlog#

VUE saying "allow me". While VUE does have several used lines containing the phrase "allow me", he never says it as a standalone line.

fcb77989-ca91-41dd-9445-dd3aacfb959f.dlog#

This dlog file contains all of Duke's responses for defeating an enemy, almost half of which are unused. While some lines could have been seen as being either too similar to used lines or too out-of-character for Duke to say to Samus, others have no clear reason for being removed.

Uncalled Dialogue (DuplicateData)#

There are several lines here that don't get called by any of the dlog files in the game, all of which are from MacKenzie. First is a fairly generic reaction from him that could've been used for almost anything. Interestingly, the paks fg_1080_giantTree, fg_1140_engineerRescue, and fg_1150_missileBlockers all list the label "00_REM_FG_1080_destroysSapBarrier_1_ENG_OhWellOkay" in their respective ROOM files, which suggests that this line was likely meant for when Samus destroys a sap barrier in one of those locations. The line also has the filter that's used when MacKenzie talks to Samus over the radio, even though he doesn't use it in those locations.

Next is a line where he seems to be annoyed with Samus destroying something. This may have been meant for a similar situation to the line above, though none of the files in the final game contain any labels referencing it.

Last is a line where he notices a mosquito in amber. This line is almost certainly a nod to Jurassic Park, which would fit right alongside the game's other references to 1980s sci-fi films (such as Aliens and Predator). Similarly to before, the paks fg_1080_giantTree, fg_1140_engineerRescue, and fg_1150_missileBlockers all list the label "00_AMB_FG_1080_ApproachSapBlocker_1_ENG_Fascinatin" in their respective ROOM files, which suggests that this line was likely meant for when Samus approaches a resin Missile blocker in one of those locations.

fg_1070_largeRoots.pak#

Uncalled Dialogue (fg_1070_largeRoots)#

This pak's sole dlog file never calls a line where MacKenzie comments on a creature's stingers (likely referring to Shren, which are the only creatures set to spawn in this area). Strangely, the pak does have the label "00_AMB_FG_1070_JungleFlyerCombat_2_ENG_Idonotlike" listed in its ROOM file.

fg_1140_engineerRescue.pak#

f690877f-2d83-4e6b-ba85-f160668163b5.dlog#

This file has some unused reactions from MacKenzie...

... Along with a lot of assorted groans, grunts, and yells from him. Due to the sheer amount of unused sounds in this pak, it seems that MacKenzie may have once played a more active role in his introductory area.

fg_3000_courtyard.pak#

Uncalled Dialogue (fg_3000_courtyard)#

There are a ton of unused lines where MacKenzie is fascinated and/or surprised by something, none of which are called by the pak's sole dlog file. Strangely, the pak's ROOM file contains labels that correspond to most of these unused lines, though it should be noted that some labels are a little bit different from the actual spoken dialogue. These "labeled" files are as follows:

While the following lines don't have any corresponding labels, it's safe to assume that they were probably meant for the same thing.

fg_3020_mech.pak#

Uncalled Dialogue (fg_3020_mech)#

A line from MacKenzie talking about the mech, which is never called by the pak's dlog file. While zone_furyGreen does use a variant of this line, it's split up into three separate audio files and uses a different take. Interestingly, this pak's ROOM file has the label "00_AMB_FG_3020_EngineerExaminesMech_1_ENG_PoorbabySh" - while this could correspond to the used line, it's far more likely that it corresponds to this unused line (as the used line already has a corresponding label in one of the game's msbt files).

fg_3040_baseCamp.pak#

There are three dlog files (b3971111-5739-483b-96d5-653c8df9951e.dlog, 389efb91-7553-4a20-ada6-1f161f2a8981.dlog, and 7c93bade-b2af-4b92-ad04-4ee97005f39f.dlog) that contain a whopping total of sixty unused base camp conversations. For the sake of keeping this already-long page at a somewhat reasonable length, those conversations are documented on a separate page.

0ae7b032-4fd5-4574-83da-e412b10e3bca.dlog#

Some unused responses from Armstrong to Samus, presumably for when she's done with a topic. Considering that the NPCs only say 1-2 sentences to Samus when she interacts with them in base camp, these were likely cut for being unnecessary. Oddly, these lines have a filter over them similar to when Armstrong is speaking over the radio in Flare Pool.

38b5dcfd-dd4e-4655-9034-156bebadcac6.dlog#

Some small interactions between Armstrong and the other troopers. The game doesn't seem to have any place where it would make sense for these interactions to occur.

There's also what appears to be an early version of the cutscene where Armstrong and Duke first meet Samus at base camp. Considering that Armstrong refers to MacKenzie as "engineer" in the last line, this was likely made very early in development.

199b374d-064a-4833-a170-1b637807c3d4.dlog#

Armstrong has unused dialogue acknowledging that Samus rescued VUE, along with some lines telling Samus to go to Great Mines. The final game has Armstrong and the other troopers (sans MacKenzie) go to Great Mines right after Samus rescues VUE, which makes it impossible for these lines to play in-game.

b3ab4fdb-f919-47ec-853f-783197b5b110.dlog#

Like Armstrong, Duke also has some unused dialogue for when he's done talking to Samus. These were likely cut for the same reasons as Armstrong's dialogue (being unnecessary due to the low amount of dialogue from the NPCs to Samus in base camp). Additionally, all of Duke's responses are filtered, sounding similar to when he's talking over the radio in Flare Pool.

There's also some generic unused dialogue from Duke, which were likely meant to play when Samus interacts with Duke. All of these lines are filtered.

cf8c64d7-dd51-4bf8-bedf-04ba7ffc45fe.dlog#

This file contains an early version of the cutscene where Duke tells Samus to secure the memory fruit.

dedab37d-5dbc-47f3-b221-d45831356141.dlog#

Some lines from VUE saying that he can't interact with Samus because of repairs/maintenance. There isn't a point in the game where any of the NPCs would have a reason for refusing to interact with Samus, making these lines particularly odd.

VUE also has dialogue that's likely meant for when he "properly" powers on after the aforementioned repairs. These seem to indicate that VUE was originally supposed to get repaired at base camp after being turned on in Ice Belt, though it's also possible that these lines are simply misplaced (if the line about being in "hostile territory" is anything to go by, at least).

VUE also has several lines telling Samus to go to Great Mines. In the final game, Samus is rather abruptly told to go to Great Mines by MacKenzie right after she leaves Ice Belt after powering on VUE, with the other characters never once mentioning it. Notably, the first line here reveals that VUE apparently used a woman text-to-speech voice during development, though this was likely done so it wouldn't be mistaken for his actual in-game voice and probably wasn't related to his gender at any point in development.

UI_PauseMenu#

Uncalled Dialogue (UI_PauseMenu)#

Rather bizarrely, a line from one of the generic troopers at the UTO Research Center can be found among all the other audio files here, with it seemingly being ripped directly from the dialogue track for the cutscene where a trooper tells Samus what's going on. This could have been a placeholder line for MacKenzie's hint system, but even then this would still be very unusual, as those lines are kept in the pak files for either UniverseRoom or zone_SolValley (in fact, this line is the only piece of dialogue found in the entire pak). It's also possible that this was used to test the volume setting for the voices, though even in that scenario it would make more sense to keep it in UniverseRoom, since that setting isn't be exclusive to the pause menu.

UniverseRoom.pak#

Uncalled Dialogue (UniverseRoom)#

There's an unused line from MacKenzie that's never called by the game, which was meant to be used for the hint telling Samus that the mech parts aren't just in the debris fields. Strangely, the hint used by the game still says "like Ice Belt" at the end of its subtitle, even though that part is completely absent from the audio file used for that hint. This oddity seems to indicate that this line either got replaced at the very last second or was unused by mistake.

vf_1120_showroom.pak#

0cc48763-fe84-4738-81ad-c9022eec4e80.dlog#

There's a single line from MacKenzie that appears to be an alternate take of two used lines ("With your new abilities...are there any devices in there...you can activate now?" and "You may need to...explore the other towers..."). This line is lacking the filter that's used on the lines said by MacKenzie over the radio, which is the only way he can communicate with Samus in Volt Forge.

zone_FlarePool.pak#

0a7d1118-1169-4ea2-988f-387ddb59440f.dlog#

A line from Duke referring to a "container". The final game uses a similar line where Duke instead calls it a "containment system".

9cf98b04-58d4-49a3-a5a6-5892edef21e3.dlog#

This file consists of a conversation where Duke talks to Armstrong, clearly meant to occur sometime before he and Samus find her. Considering that Duke only talks to Armstrong in cutscenes before finding her, these lines are likely the remnants of a cutscene that was removed from the final game.

32bc32a8-d89f-4c2d-b351-1f0fb8ac3e51.dlog#

Some unused lines of Armstrong cheering Samus on. There isn't any clear reason for why these were cut.

3771584d-99cd-499b-a861-018c939319bd.dlog#

A few text-to-speech lines from Duke asking what was being kept in one of the rooms. Considering that the dlog file also has a used line referring to "escape pods", these lines are likely referring to the Control Room (which is the only room in Flare Pool with escape pods).

There's also an unused line where Duke is apologizing to Armstrong about... something. This line is also done by a text-to-speech voice.

c8fc6315-83cb-4bfd-a7bb-eb99908a8e52.dlog#

Several lines from Duke talking about the cannon by the volcano, all of which are done by a text-to-speech voice.

c9bccead-3c56-4fd4-a71e-0b4f15208e50.dlog#

Somewhat unusually, a few of Duke's grunts appear to be unused, which is evident by them using a text-to-speech voice.

There's also this sound of Duke saying "OK". Even though the word "OK" is consistently subtitled throughout the game, this sound doesn't have any existing subtitles associated with it.

c983c7ac-21c9-40aa-8773-6346e5cef237.dlog#

A line from Armstrong talking about a "bird", which is filtered for some reason. There isn't anything in Flare Pool that resembles a bird, making this line's existence fairly unusual.

db64fe5f-2fac-4d64-9de3-4c79b063ba3d.dlog#

There are several interactions between Duke and Armstrong that go completely unused.

This interaction is entirely text-to-speech and (more noticeably) talks about using "pillars" to get rid of a "bandit". This likely refers to the Hover Shuttle Transport boss fight, given that "bandit" is a military term for a hostile aircraft.

This interaction seems to be an earlier version of the one that occurs over the comms when Duke and Armstrong reach the control room. Note that while Armstrong's line here is identical to one of her used lines, this specific line is actually kept in a completely separate audio file from that one, meaning that the file heard here is never used in-game.

e0a1c94f-464d-4e44-84c0-e42d75fcdd7d.dlog#

This file has an unused line from Armstrong. While this probably would have played shortly after Duke and Samus find Armstrong (since the dlog file mostly consists of Armstrong's initial fangirling towards Samus), there isn't anything that hints at what Armstrong would've been referring to here.

zone_FuryGreen.pak#

3e69ba79-cba6-4c90-b492-6a801e0e5544.dlog#

A few lines from MacKenzie talking about a fire of some kind. along with some more generic comments.

There's also two lines where MacKenzie comments on the view of the valley.

And he also has a line asking to be on the lookout for something.

3ef7de0c-da83-4359-8fb2-04a3fe686a88.dlog#

A line from MacKenzie talking about field work.

4a7e6783-d9e3-4b6f-8020-8325b372f3e3.dlog#

This file has a lot of unused lines from MacKenzie; if the file's used lines are anything to go by, these unused ones were likely meant to play in the Temple Entrance where Samus acquires the Control Beam. First are a few lines where he talks about a door locked with some "strange seals", which oddly have the filter normally used when MacKenzie's talking over the radio.

MacKenzie being fascinated by something, probably related to the "strange seals" mentioned above. Notably, one of these lines appears to have a corresponding label in the ROOM file for fg_3000_courtyard.pak ("00_AMB_FG_3000_EngineerApproachesContainer_3_ENG_Wellwouldy"), further suggesting that the lines in this dlog file were meant for that area.

MacKenzie reacting to Samus demonstrating her psychic powers, all of which are filtered. Some of these lines sounding rather... cringe-worthy (for lack of a nicer term), which could have contributed to their removal. In the final game, MacKenzie doesn't directly comment on Samus's newfound psychic abilities.

MacKenzie reacting to Samus finding something.

A rather out-of-place line where MacKenzie reacts to Samus finding something in Flare Pool, likely the Fire Chip. The final game uses a completely different line when Samus returns with the Fire Chip ("Welcome back, Samus. Come on... Show me what you found in Flare Pool.")

And lastly, a few assorted text-to-speech lines from MacKenzie.

10b1a7dd-f6e6-4a0d-a50b-43d5710e0b30.dlog#

A line from MacKenzie meant for when Samus arrives at base camp with the Fire Chip. The context of the line (the preceding line is his used reaction to Samus arriving from Ice Belt with the Ice Chip) along with its phrasing seems to imply that he wasn't aware that Samus found the Fire Chip at all, which could have contributed to the line's removal.

33ec124f-0432-41d4-9bab-ee81311c54a6.dlog#

Some lines from MacKenzie that were likely meant for when he and Samus fight the Grievers on the bridge.

A few lines from MacKenzie begging Samus to not leave him behind, all of which have the filter used when MacKenzie talks over the radio.

And lastly, a line from MacKenzie talking about the architecture.

080a6992-e48b-41c0-ad56-5666d8337a6a.dlog#

A couple of unused lines from MacKenzie. The rest of the dlog file consists of (otherwise used) lines in an order that ends up vaguely resembling the cutscene where MacKenzie installs the Ice Shot, which seems to indicate that this dlog file (and the lines called by it) was probably used as a placeholder for that cutscene.

348e90ba-2e03-44bf-a1c2-d3897670829a.dlog#

A fairly generic line from MacKenzie. This line can also be found in some of the other dlog files in zone_FuryGreen.pak (specifically 39ea9d54-8bfc-4f53-82b2-ffddb329601a.dlog, 47cd9704-bd2f-4b98-a8ab-9d0c692b82f0.dlog, 1410e970-96a7-4373-be7a-d42e2269f5f3.dlog, and aa785467-4fba-462b-888f-ae28dfe6e31b.dlog), which suggests that this line was supposed to be a placeholder interaction line for MacKenzie.

A bunch of lines where MacKenzie tells Samus to give something to him, very likely related to the elemental shots that he installs.

And lastly, a few assorted unused lines from MacKenzie.

59805b04-3cea-41d4-986d-2c2dd0d44e67.dlog#

MacKenzie talking about a "huge root". No clear reason for why this line was cut.

a90a4580-e0ff-4484-86f5-5cdc4138d411.dlog#

A generic line from MacKenzie, possibly meant for when Samus first uses one of her psychic abilities around him.

ae3f63c0-6c42-446b-ae49-b27e48649ea7.dlog#

Some text-to-speech lines from MacKenzie talking about some "Gal Fed tech". The first line strongly implies that Armstrong would go somewhere by herself and cause Samus to rescue her, which indicates that either Flare Pool or Great Mines (likely the latter location) was very different at some point in development.

b5911672-a774-4dad-b566-902bf422a0b1.dlog#

Some lines of MacKenzie seeming relieved about something. These are the only lines in the dlog file, so there isn't anything indicating where or when they would've been used.

c165aebb-846d-4417-9ebc-35142bf36bc4.dlog#

A few lines from MacKenzie explaining what he was doing when he got teleported to Viewros. There doesn't seem to be any clear reason for why these lines were cut.

d2a62157-4c36-42d4-b898-c883f2c98da1.dlog#

MacKenzie telling Samus to destroy some nests. Interestingly, the pak file for fg_1070_largeRoots contains the label 00_AMB_FG_1070_SamusDestroysNest_1_ENG_Itsworking, which seems to indicate that this line was going to play after Samus destroys a nest and also points to this line specifically referring to Shren nests (as Shren are the only creature set to spawn in that area, along with them being the only creature in Fury Green to appear from visible nests). While Samus can destroy Shren nests in the final game, there isn't any dialogue that outright tells her to do so.

f201ad75-6fc1-4bf5-a2e4-d048030b6ee6.dlog#

MacKenzie talking about the mech parts. For some reason, this is located alongside the lines related to the Fire Shot (which is the very first elemental shot in the game), suggesting that Samus would've started looking for mech parts much earlier than she does in the final game.

fd477610-3ac1-4795-be49-0952f24481ca.dlog#

A few lines from MacKenzie that may have been seen as redundant to use in-game. While these lines do have triggers to play when speaking to MacKenzie, they require certain events to be progressed in an order that's impossible without the help of a save editor (like having Samus leave Fury Green and obtain Vi-O-La before she fights Carvex).

ff1c209c-257c-4080-a72e-657e59508763.dlog#

Some dialogue of MacKenzie giving a tutorial for the map screen, which likely would have played shortly after he says that comms are back online (though if that is the case, then these lines are missing the filter used when MacKenzie speaks over the comms). The map screen is fairly straightforward and doesn't really require an entire tutorial to use, which is probably why these lines were cut.

zone_GreatMine.pak#

a624b2a1-fed2-46de-b00d-96a36797b7cd.dlog#

A line where Armstrong is reacting to something, likely Grievers. It fits right alongside the other reactions in the dlog file, so there isn't a clear reason why this line got cut.

There's also this line where Armstrong talks about defeating something (again, probably Grievers), which uses a text-to-speech voice for some reason.

bf20c54f-09ce-41b7-9d7a-14c0c4393c95.dlog#

A rather generic line from Duke, possibly cut due to his "team" only consisting of two other people for a majority of the area.

zone_SolValley.pak#

0c29e3a3-7f38-4e6b-80b9-452eebc45673#

A small piece of dialogue from MacKenzie talking about the sand "geysers" made by Varmis.

277f542e-826a-47f6-9899-2c37652cc2d2.dlog#

Some lines for when Samus finds the Ice Chip in Ice Belt. Most of the lines lack the filter used when MacKenzie talks over the radio, and several lines mention the upgrade being cold (which MacKenzie never acknowledges in the final game).

667cd585-79be-4eae-9695-845955f7065b.dlog#

This file contains a bunch of unused lines from MacKenzie that were likely meant for the Varmis boss fight.

First are some lines that seem to be for when Samus takes damage, which are all missing the filter used when MacKenzie speaks to Samus over the radio. These lines could have had the potential to get very annoying very quickly, which is likely the main reason they go unused.

There are also some lines that seem to be for Samus damaging Varmis, which were probably cut for the same reason as the "taking damage" lines above. These lines are also lacking the filter used when MacKenzie speaks over the radio.

There are also some lines that seem to be for when Samus defeats Varmis, though the first few lines are nonspecific enough that they could have possibly been for Samus merely damaging Varmis instead. Aside from not using the radio filter, these don't seem to have a clear reason for being unused.

And finally, a few lines talking about a "power cell", which are also unfiltered. In the final game, MacKenzie says that Varmis has either a "transport pod" or a "mech piece" (depending on when Samus fights Varmis).

7332599c-0c85-49ad-84ef-24f6db4cd187.dlog#

A line from MacKenzie telling Samus to scan her surroundings. While this line does have an associated subtitle, it lacks the filter used when MacKenzie speaks over the radio (which is the only way he can talk with her in Sol Valley), making it fairly apparent that the line isn't used.

There's also this line, meant for right after Samus goes in Varmis and blows it up. While there's no clear reason why this was cut, it's possibly due to it coming across as a bit... weird, for lack of a better word.

af2334cf-c25a-458b-91f5-72c78b61c5dc.dlog#

A few lines from MacKenzie talking about the mech parts, none of which have the filter used when MacKenzie is talking to Samus over the radio. Oddly, these lines are also found in 53179c30-db39-437c-8e38-965d4401497b.dlog, which contains the dialogue used after Samus first explores Ice Belt (about halfway into the game). It's possible that, at one point in development, the hunt for mech parts would've started at that point instead of being done near the end of the game.

c04fa729-a176-43b1-8e2d-2ab6c6f636bd.dlog#

This file has by far the most unused lines out of any dlog file in the game (excluding the base camp conversations), containing over thirty unused lines. Starting off with some variants of MacKenzie asking if he needs to repeat himself. That won't be necessary, MacKenzie...

Some generic lines meant for when Samus finds an elemental shot chip. None of these use the filter for when MacKenzie talks over the radio.

There are a lot of lines telling Samus where to go. Their nearly-identical structure seems to indicate that getting the keys used to be much less linear than in the final game, which could explain the final game's infamous line where MacKenzie says that Samus can get the keys in any order. First are some lines that were presumably meant to follow another sentence by MacKenzie, none of which are filtered. The final game uses the corresponding line for Ice Belt in one of the map screen hints (specifically the one reminding Samus about Ice Belt's Thunder Shot blockers), but the rest go unused.

Naxt are several lines of MacKenzie asking if Samus has "checked out" various areas, all of which have very similar sentence structures. The final game only uses the corresponding lines for Ice Belt ("Have you checked out the snowy mountain?") and Flare Pool ("Have you checked out the volcano?"), leaving these unused... not that they sound particularly close to being used in the first place.

And last of the lines telling Samus where to go are these text-to-speech ones, which all talk about a "beacon" in certain areas. The final game only uses the term "beacon" when referring to the distress signals sent out by some of the Federation Troopers (specifically MacKenzie and Armstrong), so these lines could be from a point in development where the NPCs' locations weren't yet finalized.

Some lines of MacKenzie trying to contact Samus, none of which are filtered. The third line is very similar to a line that's used when MacKenzie first contacts Samus in Volt Forge, so it's possible these were going to play when MacKenzie first contacts Samus in Sol Valley.

Some lines from MacKenzie telling Samus to look somewhere, possibly placeholders for more specific lines.

Along with some lines where MacKenzie tells Samus to head back to base camp, also possibly used as placeholders.

And finally, there's this rather... concerning line from MacKenzie, which is lacking the filter used when he's speaking over the radio. Some of the other paks have unused lines referencing an earlier version of an area (either Flare Pool or Great Mines, likely the latter location) where Armstrong would go there on her own and cause Samus to have to rescue her, so this line is likely just another leftover from that scrapped idea.

zone_voltForge.pak#

d23d55de-f900-4510-98aa-9f3f10ceaa94.dlog#

This file has several text-to-speech lines of MacKenzie telling Samus that she needs to restore power in order to access tower three.