Ao Oni uses a large number of free and stock RPG sound effects and music. The frightening music and ambient breathing heard during the game have become staples of the genre and are signature themes.
This page contains every sound in the game, including slowed down or sped up versions of stock sounds, and even those used that are used in only one version or aren't used at all.
Stock RPG Maker XP sounds[]
Menu Sounds[]
Like a huge amount of games, Ao Oni has a menu that can be accessed by pressing X, Numpad 0, or Esc. All of the sounds are named "system" (example - 002-System02.ogg). The sounds are listed below:
| Usage | Number | Sound |
|---|---|---|
| Select | 01 | |
| Accept/Open menu | 02 | |
| Cancel/Close menu | 03 | |
| Unavailable | 04 | |
| Equip | 05 | |
| Save | 07 | |
| Load | 08 |
The "Unavailable" sound is only used when you press the accept button (Enter, C, Spacebar) in the inventory while not having any items at all.
The "Equip" sound was only present in Version 1.1 and Version 3.0, and was actually left in the game unintentionally - there were parts of the menu called Skills, Equip, and Status. These parts of the menu were useless, due to the game not having any battle mechanics. When pressing the accept button (Enter, C, Spacebar) in the Equip menu (despite not having any equippable items), that sound would play.
001-Wind01[]
001-Wind01.ogg is a stock RPG Maker XP sound used in all versions of Ao Oni. This sound constantly plays in the mansion and the basement.
003-Wind03[]
001-Wind03.ogg is another stock RPG Maker XP wind sound. It is also used in all versions, playing outside of the mansion, when everyone enters it.
005-Rain01 and 006-Rain02[]
005-Rain01.ogg and 006-Rain02.ogg are used in Version 5.2 and Version 6.23. It is, obviously, a rain sound. These sounds are used in the annex and outside of the mansion. The first sound can be heard in most of the rooms of the annex, while the second sound can be heard in rooms with windows, and outside of the mansion.
| 005-Rain01 | |
| 006-Rain02 |
017-Creature01[]
The Oni is often associated with a heavy breathing sound that plays during certain scenes or locations. During chase scenes where the player hides in the closet, the breathing sound is played when the Oni enters the room. In later versions, the breathing sound is looped continuously when the player enters the annex basement. The breathing sound originates from the RPG Maker XP RTP files titled 017-Creature01.ogg.
In all versions of the game, there is a small room before the basement. In Version 1.1 and Version 3.0, the room is dark, and a significantly slowed down version of this sound plays in that room. This is the only place where a slowed down version of 017-Creature01.ogg is used, and it is nowhere to be found in Version 5.2 and Version 6.23.
| 1.0x speed (All versions) | |
| 0.5x speed (1.1 and 3.0 only) |
024-Door01[]
024-Door01.ogg is used in all versions, being a door opening sound. It is used when a closet is opened, and when a safe is opened. In Ao Oni, this sound is only played 1.5x speed.
| 1.5x speed | |
| 1.0x speed (Unused) |
025-Door02[]
025-Door-02.ogg is a sound used in all versions of Ao Oni. This is a door closing sound, used whenever you enter most rooms. The same sound is used when entering a closet, or in the scene where the old man tries to kick the door open, although sped up.
| Normal speed (1.0x) | |
| Sped up (1.5x) |
027-Door04[]
027-Door04.ogg is used whenever the player opens or closes the jail cell door. A sped up version of it also plays whenever the oni tries to break the jail cell bars.
| Normal speed (1.0x) | |
| Sped up (1.5x) |
028-Door05[]
028-Door05.ogg plays whenever the player attempts to open a locked door. In Version 1.1, this sound also plays when locking the bedroom door, although slightly slower.
| Normal speed (1.0x) | |
| Slowed down (0.9x) |
032-Switch01[]
032-Switch01.ogg is used in all versions except Version 3.0. In Version 5.2 and Version 6.23, this sound plays whenever a stone is inserted or taken from a doll. In Version 1.1, there is an item which is not present in any other version - the flashlight. This sound plays when using the flashlight.
033-Switch02[]
033-Switch02.ogg is used whenever the player unscrews a panel in Version 5.2 and Version 6.23. This sound also plays when inserting the doll head in the doll puzzle.
034-Switch03[]
034-Switch03.ogg is used in Version 5.2 and Version 6.23. This sound plays when you attach the doorknob after unscrewing it from another door. In Version 6.23, this sound also plays at half the speed, whenever a door is locked or unlocked in the blue puzzle.
| Normal speed (1.0x) | |
| Slowed down (0.5x) |
035-Switch04[]
035-Switch04.ogg plays in Version 5.2 and Version 6.23, when you unscrew the doorknob from the fake door.
052-Cannon01[]
052-Cannon01.ogg is used as a thud sound in Ao Oni - when Hiroshi lands after jumping down the hole in the bedroom in all versions, when Hiroshi tries to kick the entrance door open in Version 1.1, and this sound also plays over and over while Squatto kills Mika in Version 3.0.
129-Earth01[]
129-Earth01.ogg plays when a bookshelf is moved, and a sped up version of it plays whenever the player pushes a chair or a statue. Although there is a push sound in the stock RPG Maker XP sounds, this sound is used instead.
| Normal speed (1.0x) | |
| Sped up (1.5x) |
Custom sounds[]
This is a list of sounds that do not come from RPG Maker XP, but instead, are found in the "Audio" (or "BGM") folder.
Chase Theme (horor-b)[]
- The chase theme is internally known as horor-b.mid (horor-b.wav in Version 6.23), an instrumental track that plays during the chase sequences with the Oni, Blockman, Squatto, and the Oni's character variants.
In efficient game design, the MIDI engine should be started as the game boots up, but in previous versions of the game it is launched as soon as the music should be playing. On some older computers, this takes a few seconds, resulting in a few seconds of lag and game-freezing every time the Oni is set to appear during random encounters While it chases the Player.
The MIDI file features two instruments, each named "horor-b." A staccato violin plays G5 and G#5 together, while a low vibrato sine wave rises from F1 to C2. The track plays at 89 BPM, and runs for 8 bars, with a one bar rest in the beginning.
This is a sample of the violin used on the song
A5_05142[]
A5_O5142.WAV is a double wooden hit sound used in all versions of Ao Oni. This sound plays when the closet Takeshi is hiding in shakes. In Version 5.2, this sound is also used when the panel falls off after the length puzzle is solved. This sound is actually an edited version of 031-Door08.ogg, a stock RPG Maker XP sound, with a part of the sound removed.
| A5_05142 | |
| 031-Door08 (Unused) |
A5_09285[]
A5_09285.WAV is a glass breaking sound used in all versions of Ao Oni, playing at the beginning of the game. In versions 3.0, 5.2 and 6.23, this sound scares Takeshi, but in Version 1.1, this sound scares Kazuya instead. In all versions, Hiroshi decides to go check what caused this sound, and it is revealed that it was just a plate shattering. When Hiroshi returns to the foyer, everyone is gone. In Version 5.2, this sound is also used everytime the roach oni crashes through a window.
A5_10333[]
A5_10333.WAV is a screaming sound used in Version 3.0 and Version 6.23. In both versions, there is a scene where the old man is running to the entrance door, but it's locked. He tries to open it, kicks it, but it doesn't open, and he starts screaming before getting attacked. This sound is never fully heard in-game, only a part of it.
A5_11346[]
A5_11346.WAV is only used in Version 5.2. In the epilogue, three more students enter the mansion, and soon after, the oni enters the room. Seconds later, the mansion roof is shown, with birds flying away, along with this sound playing. Unlike other "A5" sounds, this one is located in the "BGM" folder instead of the "Audio" folder.
A5_12362[]
In Version 3.0, a low whispering sound is made during a scene before the final chase where the Oni slowly approaches the player before actually giving chase. The whispering sound, titled A5_12362.WAV, consists of 19 seconds of incoherent mumbling in what could be a child's voice. Although this sound is unused in later versions, it can still be found in the sound effect folder.
A5_16491[]
A5_16491.wav is a haunting instrumental track that usually plays before the first encounter with the Oni. In all versions of the game, this ambient music plays after the Oni walks past for the first time. The audio file is 19 seconds long, and features an eerie bell-like pad that outlines an A flat augmented chord.
A5_16491.wav is actually taken from the visual novel, Higurashi no Naku Koro ni.
bikkuri[]
In Version 1.1, a loud, startling sound called bikkuri.wav bikkuri ((びっくり surprised) plays, interrupting PailC@11.wav, when the player discovers Ryota's corpse in the bathroom tub. The audio file is 2 seconds long, and consists of a large drum being struck and a shrill violin draw. Although this sound is unused in later versions, it can still be found in the sound effect folder. Bikkuri.wav is actually taken from the visual novel, Higurashi no Naku Koro ni.
bosu02[]
bosu02.wav is a sound only used in Version 1.1. It can be heard when digging using a shovel. Like any other sound, this sound is still present in the audio folder in Version 6.23, though unused. It's unknown where this sound is from.
bosu14/crash23[]
crash23 is a sound effect introduced in Version 5.2 and bosu14 is a sound effect introduced in Version 6.23. Both are for different purposes despite sounding very similar. crash23 is consistently used for when the Ao Oni pops up beneath the floorboards of both the Shed and the Old Building. bosu14 is used when Hiroshi falls down a hole in the Annex.
| bosu14 | |
| crash23 |
coin01[]
In Version 1.1, after the player leaves the archive room, they will find Takuro again. Hiroshi will give Takuro the bedroom key, hoping that Megumi will leave the bedroom with Takuro (she refused to leave with Hiroshi). The sound coin01.wav plays when Hiroshi gives Takuro the bedroom key.
fire01[]
fire01.wav is used in Version 5.2 and Version 6.23 when a candle is lit up. There isn't much to say about this sound, except that it's louder in-game.
insect00[]
insect00.wav is a sound present in Version 5.2. This sound consist of 11 clicks, which sound like an insect. This sound is used when Hiroshi gets too close to the Roach Oni in the annex. Its origin is also unknown.
kachi19[]
kachi19.wav is a sound used in Version 6.23. This sound plays whenever a blue piece is inserted into or taken from a panel. If a door locks or unlocks due to a piece being taken or inserted, a slowed down version of 034-Switch03.ogg plays shortly after.
PailC@11[]
PailC@11.wav is a sound present in all versions of Ao Oni except Version 3.0. It is used when the player drains the bathtub. In Version 1.1, this sound gets quickly interrupted by bikkuri.wav.
S02_AJ01[]
S02_AJ01.WAV is another screaming sound, only present in Version 6.23. This one plays when you use the basement key. Hiroshi hears this sound, and quickly realizes it was Mika screaming. Before you can progress further, you will need to go to the kid's bedroom to find that the oni killed Mika.
semaru[]
semaru.WAV is a sound used in every version except Version 5.2. This sound consists of a static-like noise, progressively becoming louder and louder, before abruptly ending. In Version 1.1, after Hiroshi finds the shattered plate, a scene is shown where Takuro tries to leave, but the door is locked. Then, the oni slowly approaches the group, before charging forward with this sound, after which Hiroshi is shown again. In Version 3.0 and Version 6.23, this sound is used when the oni approaches the old man. Along with this sound, A5_10333.WAV also plays, with both sounds being cut off, meaning only a part of both sounds is heard. This also means that entire semaru.WAV sound is only heard in Version 1.1.
sha02[]
sha02.wav is a low quality sound, to the point of the low quality being likely intentional. This sound is used in Version 1.1 and Version 3.0. In Version 1.1, after Hiroshi, Kazuya and Megumi drop the rope ladder, the oni starts to climb using the bricks in the well, with this sound playing over and over. In Version 3.0, this sound is used if you choose to escape alone. Hiroshi begins to climb the ladder, when suddenly, the oni runs to him, this sound plays and a game over occurs.
step07[]
step07.wav is used in Version 5.2 and Version 6.23. After you insert both the red and blue stones into the doll/puppet's eyes, its head will fall off, and will land on the table with this sound.
swing18[]
swing18.wav is only used in Version 6.23. This sound plays whenever you move a curtain in the shapes puzzle in the Old Building.
swing40_a[]
swing40_a.wav is used in Version 5.2 and Version 6.23. This sound plays when you use the plate shard to cut out a fake wall, or in Version 5.2, also a part of a couch.
A5_05149.WAV[]
A5_05149.wav is used in Version 5.2. This sound plays when Takeshi wakes up from a bad dream at the end of the game's True Ending.
Unused Files[]
In all versions of Ao Oni, there are unused sounds. Most of these were used in a previous version. This section contains sounds that aren't used in any version, but present in the "Audio" or "BGM" folder.
ExplosionD@11St[]
ExplosionD@11St.wav consists of a distorted explosion. Like PailC@11.wav, this sound contains @11 in its name, which could possibly mean both sounds coming from the same source.
Version 1.1's unused music[]
Every version contains sounds from previous versions, however, in the first version, there are two audio files that weren't present in any other version.
Saiv[]
Saiv.mid sounds like a slowed down tuba with an acoustic violin accompanying it.
BGM008[]
BGM008.ogg is what sounds like high notes on a piano doing a ritardando with short periods of silence containing sharp notes.
Unknown[]
It's unknown where these sounds are used, so these may or may not be unused.
A5_04107.WAV[]