diff --git a/lua/arc9/common/sh_common.lua b/lua/arc9/common/sh_common.lua
index 4af29606..9fcdbcf0 100644
--- a/lua/arc9/common/sh_common.lua
+++ b/lua/arc9/common/sh_common.lua
@@ -30,47 +30,47 @@ ARC9.CosmeticCategories = {
     ["stickers"] = true,
 }
 ARC9.ShellSoundsTable = {
-    "arc9/casings/casing_556_1.wav",
-    "arc9/casings/casing_556_2.wav",
-    "arc9/casings/casing_556_3.wav",
-    "arc9/casings/casing_556_4.wav",
-    "arc9/casings/casing_308_1.wav",
-    "arc9/casings/casing_308_2.wav",
-    "arc9/casings/casing_308_3.wav",
-    "arc9/casings/casing_308_4.wav"
+    "arc9/casings/casing_556_1.ogg",
+    "arc9/casings/casing_556_2.ogg",
+    "arc9/casings/casing_556_3.ogg",
+    "arc9/casings/casing_556_4.ogg",
+    "arc9/casings/casing_308_1.ogg",
+    "arc9/casings/casing_308_2.ogg",
+    "arc9/casings/casing_308_3.ogg",
+    "arc9/casings/casing_308_4.ogg"
 }
 
 ARC9.PistolShellSoundsTable = {
-    "arc9/casings/casing_9mm_1.wav",
-    "arc9/casings/casing_9mm_2.wav",
-    "arc9/casings/casing_9mm_3.wav",
-    "arc9/casings/casing_9mm_4.wav",
-    "arc9/casings/casing_9mm_1.wav",
-    "arc9/casings/casing_9mm_2.wav",
-    "arc9/casings/casing_9mm_3.wav",
-    "arc9/casings/casing_9mm_4.wav"
+    "arc9/casings/casing_9mm_1.ogg",
+    "arc9/casings/casing_9mm_2.ogg",
+    "arc9/casings/casing_9mm_3.ogg",
+    "arc9/casings/casing_9mm_4.ogg",
+    "arc9/casings/casing_9mm_1.ogg",
+    "arc9/casings/casing_9mm_2.ogg",
+    "arc9/casings/casing_9mm_3.ogg",
+    "arc9/casings/casing_9mm_4.ogg"
 }
 
 ARC9.TinyShellSoundsTable = {
-    "arc9/casings/casing_22_1.wav",
-    "arc9/casings/casing_22_2.wav",
-    "arc9/casings/casing_22_3.wav",
-    "arc9/casings/casing_22_4.wav",
-    "arc9/casings/casing_22_1.wav",
-    "arc9/casings/casing_22_2.wav",
-    "arc9/casings/casing_22_3.wav",
-    "arc9/casings/casing_22_4.wav"
+    "arc9/casings/casing_22_1.ogg",
+    "arc9/casings/casing_22_2.ogg",
+    "arc9/casings/casing_22_3.ogg",
+    "arc9/casings/casing_22_4.ogg",
+    "arc9/casings/casing_22_1.ogg",
+    "arc9/casings/casing_22_2.ogg",
+    "arc9/casings/casing_22_3.ogg",
+    "arc9/casings/casing_22_4.ogg"
 }
 
 ARC9.ShotgunShellSoundsTable = {
-    "arc9/casings/casing_12ga_1.wav",
-    "arc9/casings/casing_12ga_2.wav",
-    "arc9/casings/casing_12ga_3.wav",
-    "arc9/casings/casing_12ga_4.wav",
-    "arc9/casings/casing_12ga_1.wav",
-    "arc9/casings/casing_12ga_2.wav",
-    "arc9/casings/casing_12ga_3.wav",
-    "arc9/casings/casing_12ga_4.wav"
+    "arc9/casings/casing_12ga_1.ogg",
+    "arc9/casings/casing_12ga_2.ogg",
+    "arc9/casings/casing_12ga_3.ogg",
+    "arc9/casings/casing_12ga_4.ogg",
+    "arc9/casings/casing_12ga_1.ogg",
+    "arc9/casings/casing_12ga_2.ogg",
+    "arc9/casings/casing_12ga_3.ogg",
+    "arc9/casings/casing_12ga_4.ogg"
 }
 
 ARC9.RicochetSounds = {
diff --git a/lua/entities/arc9_att_base.lua b/lua/entities/arc9_att_base.lua
index 530be43d..7864d44a 100644
--- a/lua/entities/arc9_att_base.lua
+++ b/lua/entities/arc9_att_base.lua
@@ -80,7 +80,7 @@ if SERVER then
             end
 
             util.Effect("arc9_opencrate", effectdata)
-            self:EmitSound("arc9/useatt.wav")
+            self:EmitSound("arc9/useatt.ogg")
             self:Remove()
         end
     end
diff --git a/lua/weapons/arc9_base/sh_sights.lua b/lua/weapons/arc9_base/sh_sights.lua
index 1ba9e5d3..450b45da 100644
--- a/lua/weapons/arc9_base/sh_sights.lua
+++ b/lua/weapons/arc9_base/sh_sights.lua
@@ -415,7 +415,7 @@ function SWEP:Scroll(amt)
     if old != sights.ScrollLevel then
         local soundtab1 = {
             name = "zoom",
-            sound = atttbl.ZoomSound or "arc9/useatt.wav",
+            sound = atttbl.ZoomSound or "arc9/useatt.ogg",
             pitch = math.Rand(95, 105),
             vol = 1,
             chan = CHAN_ITEM
diff --git a/lua/weapons/arc9_base/shared.lua b/lua/weapons/arc9_base/shared.lua
index 01cec542..ff5f7375 100644
--- a/lua/weapons/arc9_base/shared.lua
+++ b/lua/weapons/arc9_base/shared.lua
@@ -886,7 +886,7 @@ SWEP.DistantShootSound = nil
 SWEP.DryFireSound = ""
 SWEP.DryFireSingleAction = false -- Play dryfire sound only once
 
-SWEP.FiremodeSound = "arc9/firemode.wav"
+SWEP.FiremodeSound = "arc9/firemode.ogg"
 SWEP.ToggleAttSound = {
     "arc9/toggles/flashlight_laser_toggle_on_01.ogg",
     "arc9/toggles/flashlight_laser_toggle_on_02.ogg",
@@ -896,22 +896,22 @@ SWEP.ToggleAttSound = {
 SWEP.EnterSightsSound = ""
 SWEP.ExitSightsSound = ""
 
-SWEP.EnterBipodSound = "arc9/bipod_down.wav"
-SWEP.ExitBipodSound = "arc9/bipod_up.wav"
+SWEP.EnterBipodSound = "arc9/bipod_down.ogg"
+SWEP.ExitBipodSound = "arc9/bipod_up.ogg"
 
 SWEP.EnterUBGLSound = ""
 SWEP.ExitUBGLSound = ""
 
 SWEP.MalfunctionSound = ""
 
-SWEP.MeleeHitSound = "arc9/melee_hitbody.wav"
-SWEP.MeleeHitWallSound = "arc9/melee_hitworld.wav"
-SWEP.MeleeSwingSound = "arc9/melee_miss.wav"
+SWEP.MeleeHitSound = "arc9/melee_hitbody.ogg"
+SWEP.MeleeHitWallSound = "arc9/melee_hitworld.ogg"
+SWEP.MeleeSwingSound = "arc9/melee_miss.ogg"
 SWEP.BackstabSound = "weapons/knife/knife_stab.wav"
 
-SWEP.BreathInSound = "arc9/breath_inhale.wav"
-SWEP.BreathOutSound = "arc9/breath_exhale.wav"
-SWEP.BreathRunOutSound = "arc9/breath_runout.wav"
+SWEP.BreathInSound = "arc9/breath_inhale.ogg"
+SWEP.BreathOutSound = "arc9/breath_exhale.ogg"
+SWEP.BreathRunOutSound = "arc9/breath_runout.ogg"
 
 SWEP.TriggerDownSound = ""
 SWEP.TriggerUpSound = ""
diff --git a/sound/arc9/bipod_down.ogg b/sound/arc9/bipod_down.ogg
new file mode 100644
index 00000000..cdc19525
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diff --git a/sound/arc9/bipod_down.wav b/sound/arc9/bipod_down.wav
deleted file mode 100644
index a3ed3edc..00000000
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diff --git a/sound/arc9/bipod_up.ogg b/sound/arc9/bipod_up.ogg
new file mode 100644
index 00000000..16134a33
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diff --git a/sound/arc9/bipod_up.wav b/sound/arc9/bipod_up.wav
deleted file mode 100644
index fcedf673..00000000
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diff --git a/sound/arc9/breath_exhale.ogg b/sound/arc9/breath_exhale.ogg
new file mode 100644
index 00000000..c159917b
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diff --git a/sound/arc9/breath_exhale.wav b/sound/arc9/breath_exhale.wav
deleted file mode 100644
index ab0226d1..00000000
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diff --git a/sound/arc9/breath_inhale.ogg b/sound/arc9/breath_inhale.ogg
new file mode 100644
index 00000000..1568b893
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diff --git a/sound/arc9/breath_inhale.wav b/sound/arc9/breath_inhale.wav
deleted file mode 100644
index 0c36bb3c..00000000
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diff --git a/sound/arc9/breath_runout.ogg b/sound/arc9/breath_runout.ogg
new file mode 100644
index 00000000..760cb71e
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diff --git a/sound/arc9/breath_runout.wav b/sound/arc9/breath_runout.wav
deleted file mode 100644
index 67acbf29..00000000
Binary files a/sound/arc9/breath_runout.wav and /dev/null differ
diff --git a/sound/arc9/casings/casing_12ga_1.ogg b/sound/arc9/casings/casing_12ga_1.ogg
new file mode 100644
index 00000000..e034ad5d
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diff --git a/sound/arc9/casings/casing_12ga_1.wav b/sound/arc9/casings/casing_12ga_1.wav
deleted file mode 100644
index e5c166fb..00000000
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diff --git a/sound/arc9/casings/casing_12ga_2.ogg b/sound/arc9/casings/casing_12ga_2.ogg
new file mode 100644
index 00000000..bc7f573b
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diff --git a/sound/arc9/casings/casing_12ga_2.wav b/sound/arc9/casings/casing_12ga_2.wav
deleted file mode 100644
index 4f5e77ac..00000000
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new file mode 100644
index 00000000..c78ff210
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deleted file mode 100644
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index 00000000..da50b6cd
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deleted file mode 100644
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diff --git a/sound/arc9/casings/casing_22_1.ogg b/sound/arc9/casings/casing_22_1.ogg
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deleted file mode 100644
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deleted file mode 100644
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