diff --git a/src/game/control.c b/src/game/control.c
index 1582cc8eb..ee12d4e8d 100644
--- a/src/game/control.c
+++ b/src/game/control.c
@@ -9,7 +9,6 @@
 #include "game/items.h"
 #include "game/lara.h"
 #include "game/lot.h"
-#include "game/mnsound.h"
 #include "game/objects/keyhole.h"
 #include "game/objects/puzzle_hole.h"
 #include "game/objects/switch.h"
diff --git a/src/game/inventry.c b/src/game/inventry.c
index 9b6df3e24..81c33ccf2 100644
--- a/src/game/inventry.c
+++ b/src/game/inventry.c
@@ -5,7 +5,6 @@
 #include "config.h"
 #include "game/game.h"
 #include "game/lara.h"
-#include "game/mnsound.h"
 #include "game/option.h"
 #include "game/overlay.h"
 #include "game/savegame.h"
diff --git a/src/game/mnsound.c b/src/game/mnsound.c
deleted file mode 100644
index c47b30c72..000000000
--- a/src/game/mnsound.c
+++ /dev/null
@@ -1,440 +0,0 @@
-#include "game/mnsound.h"
-
-#include "3dsystem/phd_math.h"
-#include "game/game.h"
-#include "global/vars.h"
-#include "specific/init.h"
-#include "specific/sndpc.h"
-#include "util.h"
-
-#include <stdio.h>
-
-#define SOUND_RANGE 8
-#define SOUND_RADIUS (SOUND_RANGE << 10)
-#define SOUND_RANGE_MULT_CONSTANT ((int32_t)(32768 / SOUND_RADIUS))
-#define MAX_VOLUME_CHANGE 0x2000
-#define MAX_PITCH_CHANGE 10
-#define MN_NOT_AUDIBLE -1
-
-typedef enum SOUND_MODE {
-    SOUND_WAIT = 0,
-    SOUND_RESTART = 1,
-    SOUND_AMBIENT = 2,
-} SOUND_MODE;
-
-typedef enum SOUND_FLAG {
-    MN_FX_UNUSED = 0,
-    MN_FX_USED = 1 << 0,
-    MN_FX_AMBIENT = 1 << 1,
-    MN_FX_RESTARTED = 1 << 2,
-    MN_FX_NO_REVERB = 1 << 3,
-} SOUND_FLAG;
-
-typedef enum SAMPLE_FLAG {
-    NO_PAN = 1 << 12,
-    PITCH_WIBBLE = 1 << 13,
-    VOLUME_WIBBLE = 1 << 14,
-} SAMPLE_FLAG;
-
-static MN_SFX_PLAY_INFO SFXPlaying[MAX_PLAYING_FX] = { 0 };
-static int32_t MnSoundMasterVolumeDefault = 32;
-static int16_t MnAmbientLookup[MAX_AMBIENT_FX] = { -1 };
-static int32_t MnAmbientLookupIdx = 0;
-
-static MN_SFX_PLAY_INFO *mn_get_fx_slot(
-    int32_t sfx_num, uint32_t loudness, PHD_3DPOS *pos, int16_t mode);
-static void mn_get_sound_params(MN_SFX_PLAY_INFO *slot);
-static void mn_clear_fx_slot(MN_SFX_PLAY_INFO *slot);
-static void mn_clear_handles(MN_SFX_PLAY_INFO *slot);
-
-void mn_reset_sound_effects()
-{
-    if (!SoundIsActive) {
-        return;
-    }
-    MnSoundMasterVolume = MnSoundMasterVolumeDefault;
-
-    for (int i = 0; i < MAX_PLAYING_FX; i++) {
-        mn_clear_fx_slot(&SFXPlaying[i]);
-    }
-
-    S_SoundStopAllSamples();
-
-    MnAmbientLookupIdx = 0;
-
-    for (int i = 0; i < MAX_SAMPLES; i++) {
-        if (SampleLUT[i] < 0) {
-            continue;
-        }
-        SAMPLE_INFO *s = &SampleInfos[SampleLUT[i]];
-        if (s->volume < 0) {
-            S_ExitSystemFmt(
-                "sample info for effect %d has incorrect volume(%d)", i,
-                s->volume);
-        }
-
-        if ((s->flags & 3) == SOUND_AMBIENT) {
-            if (MnAmbientLookupIdx >= MAX_AMBIENT_FX) {
-                S_ExitSystem("Ran out of ambient fx slots in "
-                             "mn_reset_sound_effects()");
-            }
-            MnAmbientLookup[MnAmbientLookupIdx] = i;
-            MnAmbientLookupIdx++;
-        }
-    }
-}
-
-bool mn_sound_effect(int32_t sfx_num, PHD_3DPOS *pos, uint32_t flags)
-{
-    if (!SoundIsActive) {
-        return false;
-    }
-
-    if (flags != SPM_ALWAYS
-        && (flags & SPM_UNDERWATER)
-            != (RoomInfo[Camera.pos.room_number].flags & RF_UNDERWATER)) {
-        return false;
-    }
-
-    if (SampleLUT[sfx_num] < 0) {
-        return false;
-    }
-
-    SAMPLE_INFO *s = &SampleInfos[SampleLUT[sfx_num]];
-    if (s->randomness && GetRandomDraw() > (int32_t)s->randomness) {
-        return false;
-    }
-
-    flags = 0;
-    int32_t pan = 0x7FFF;
-    int32_t mode = s->flags & 3;
-    uint32_t distance;
-    if (pos) {
-        int32_t x = pos->x - Camera.target.x;
-        int32_t y = pos->y - Camera.target.y;
-        int32_t z = pos->z - Camera.target.z;
-        if (ABS(x) > SOUND_RADIUS || ABS(y) > SOUND_RADIUS
-            || ABS(z) > SOUND_RADIUS) {
-            return false;
-        }
-        distance = SQUARE(x) + SQUARE(y) + SQUARE(z);
-        if (!distance) {
-            pan = 0;
-        }
-    } else {
-        distance = 0;
-        pan = 0;
-        flags = MN_FX_NO_REVERB;
-    }
-    distance = phd_sqrt(distance);
-
-    int32_t volume = s->volume - distance * SOUND_RANGE_MULT_CONSTANT;
-    if (s->flags & VOLUME_WIBBLE) {
-        volume -= GetRandomDraw() * MAX_VOLUME_CHANGE >> 15;
-    }
-
-    if (s->flags & NO_PAN) {
-        pan = 0;
-    }
-
-    if (volume <= 0 && mode != SOUND_AMBIENT) {
-        return false;
-    }
-
-    if (pan) {
-        int16_t angle =
-            phd_atan(pos->z - LaraItem->pos.z, pos->x - LaraItem->pos.x);
-        angle -= LaraItem->pos.y_rot + Lara.torso_y_rot + Lara.head_y_rot;
-        pan = angle;
-    }
-
-    int32_t pitch = 100;
-    if (s->flags & PITCH_WIBBLE) {
-        pitch +=
-            ((GetRandomDraw() * MAX_PITCH_CHANGE) / 16384) - MAX_PITCH_CHANGE;
-    }
-
-    int32_t vars = (s->flags >> 2) & 15;
-    int32_t sfx_id = s->number;
-    if (vars != 1) {
-        sfx_id += (GetRandomDraw() * vars) / 0x8000;
-    }
-
-    if (volume > 0x7FFF) {
-        volume = 0x7FFF;
-    }
-
-    switch (mode) {
-    case SOUND_WAIT: {
-        MN_SFX_PLAY_INFO *fxslot = mn_get_fx_slot(sfx_num, 0, pos, mode);
-        if (!fxslot) {
-            return false;
-        }
-        if (fxslot->mn_flags & MN_FX_RESTARTED) {
-            fxslot->mn_flags &= 0xFFFF - MN_FX_RESTARTED;
-            return true;
-        }
-        fxslot->handle = S_SoundPlaySample(sfx_id, volume, pitch, pan);
-        if (fxslot->handle == SOUND_INVALID_HANDLE) {
-            return false;
-        }
-        mn_clear_handles(fxslot);
-        fxslot->mn_flags = flags | MN_FX_USED;
-        fxslot->fxnum = sfx_num;
-        fxslot->pos = pos;
-        return true;
-    }
-
-    case SOUND_RESTART: {
-        MN_SFX_PLAY_INFO *fxslot = mn_get_fx_slot(sfx_num, 0, pos, mode);
-        if (!fxslot) {
-            return false;
-        }
-        if (fxslot->mn_flags & MN_FX_RESTARTED) {
-            S_SoundStopSample(fxslot->handle);
-            fxslot->handle = S_SoundPlaySample(sfx_id, volume, pitch, pan);
-            return true;
-        }
-        fxslot->handle = S_SoundPlaySample(sfx_id, volume, pitch, pan);
-        if (fxslot->handle == SOUND_INVALID_HANDLE) {
-            return false;
-        }
-        mn_clear_handles(fxslot);
-        fxslot->mn_flags = flags | MN_FX_USED;
-        fxslot->fxnum = sfx_num;
-        fxslot->pos = pos;
-        return true;
-    }
-
-    case SOUND_AMBIENT: {
-        uint32_t loudness = distance;
-        MN_SFX_PLAY_INFO *fxslot = mn_get_fx_slot(sfx_num, loudness, pos, mode);
-        if (!fxslot) {
-            return false;
-        }
-        fxslot->pos = pos;
-        if (fxslot->mn_flags & MN_FX_AMBIENT) {
-            if (volume > 0) {
-                fxslot->loudness = loudness;
-                fxslot->pan = pan;
-                fxslot->volume = volume;
-            } else {
-                fxslot->loudness = MN_NOT_AUDIBLE;
-                fxslot->volume = 0;
-            }
-            return true;
-        }
-
-        if (volume > 0) {
-            fxslot->handle =
-                S_SoundPlaySampleLooped(sfx_id, volume, pitch, pan);
-            if (fxslot->handle == SOUND_INVALID_HANDLE) {
-                mn_clear_fx_slot(fxslot);
-                return false;
-            }
-            mn_clear_handles(fxslot);
-            fxslot->loudness = loudness;
-            fxslot->fxnum = sfx_num;
-            fxslot->pan = pan;
-            fxslot->volume = volume;
-            fxslot->mn_flags |= MN_FX_AMBIENT | MN_FX_USED;
-            fxslot->pos = pos;
-            return true;
-        }
-
-        fxslot->loudness = MN_NOT_AUDIBLE;
-        return true;
-    }
-    }
-
-    return false;
-}
-
-static MN_SFX_PLAY_INFO *mn_get_fx_slot(
-    int32_t sfx_num, uint32_t loudness, PHD_3DPOS *pos, int16_t mode)
-{
-    switch (mode) {
-    case SOUND_WAIT:
-    case SOUND_RESTART: {
-        MN_SFX_PLAY_INFO *last_free_slot = NULL;
-        for (int i = MnAmbientLookupIdx; i < MAX_PLAYING_FX; i++) {
-            MN_SFX_PLAY_INFO *result = &SFXPlaying[i];
-            if ((result->mn_flags & MN_FX_USED) && result->fxnum == sfx_num
-                && result->pos == pos) {
-                result->mn_flags |= MN_FX_RESTARTED;
-                return result;
-            } else if (result->mn_flags == MN_FX_UNUSED) {
-                last_free_slot = result;
-            }
-        }
-        return last_free_slot;
-    }
-
-    case SOUND_AMBIENT:
-        for (int i = 0; i < MAX_AMBIENT_FX; i++) {
-            if (MnAmbientLookup[i] == sfx_num) {
-                MN_SFX_PLAY_INFO *result = &SFXPlaying[i];
-                if (result->mn_flags != MN_FX_UNUSED
-                    && result->loudness <= loudness) {
-                    return NULL;
-                }
-                return result;
-            }
-        }
-        break;
-    }
-
-    return NULL;
-}
-
-void mn_reset_ambient_loudness()
-{
-    if (!SoundIsActive) {
-        return;
-    }
-
-    for (int i = 0; i < MnAmbientLookupIdx; i++) {
-        MN_SFX_PLAY_INFO *slot = &SFXPlaying[i];
-        slot->loudness = MN_NOT_AUDIBLE;
-    }
-}
-
-void mn_stop_ambient_samples()
-{
-    if (!SoundIsActive) {
-        return;
-    }
-
-    for (int i = 0; i < MnAmbientLookupIdx; i++) {
-        MN_SFX_PLAY_INFO *slot = &SFXPlaying[i];
-        if (S_SoundSampleIsPlaying(slot->handle)) {
-            S_SoundStopSample(slot->handle);
-            mn_clear_fx_slot(slot);
-        }
-    }
-}
-
-void mn_update_sound_effects()
-{
-    if (!SoundIsActive) {
-        return;
-    }
-
-    for (int i = 0; i < MAX_PLAYING_FX; i++) {
-        MN_SFX_PLAY_INFO *slot = &SFXPlaying[i];
-        if (slot->mn_flags & MN_FX_USED) {
-            if (slot->mn_flags & MN_FX_AMBIENT) {
-                if (slot->loudness != MN_NOT_AUDIBLE
-                    && slot->handle != SOUND_INVALID_HANDLE) {
-                    S_SoundSetPanAndVolume(
-                        slot->handle, slot->pan, slot->volume);
-                } else {
-                    if (slot->handle != SOUND_INVALID_HANDLE) {
-                        S_SoundStopSample(slot->handle);
-                    }
-                    mn_clear_fx_slot(slot);
-                }
-            } else if (S_SoundSampleIsPlaying(slot->handle)) {
-                if (slot->pos != NULL) {
-                    mn_get_sound_params(slot);
-                    if (slot->volume > 0
-                        && slot->handle != SOUND_INVALID_HANDLE) {
-                        S_SoundSetPanAndVolume(
-                            slot->handle, slot->pan, slot->volume);
-                    } else {
-                        if (slot->handle != SOUND_INVALID_HANDLE) {
-                            S_SoundStopSample(slot->handle);
-                        }
-                        mn_clear_fx_slot(slot);
-                    }
-                }
-            } else {
-                mn_clear_fx_slot(slot);
-            }
-        }
-    }
-}
-
-static void mn_get_sound_params(MN_SFX_PLAY_INFO *slot)
-{
-    SAMPLE_INFO *s = &SampleInfos[SampleLUT[slot->fxnum]];
-
-    int32_t x = slot->pos->x - Camera.target.x;
-    int32_t y = slot->pos->y - Camera.target.y;
-    int32_t z = slot->pos->z - Camera.target.z;
-    if (ABS(x) > SOUND_RADIUS || ABS(y) > SOUND_RADIUS
-        || ABS(z) > SOUND_RADIUS) {
-        slot->volume = 0;
-        return;
-    }
-
-    uint32_t distance = SQUARE(x) + SQUARE(y) + SQUARE(z);
-    int32_t volume = s->volume - phd_sqrt(distance) * SOUND_RANGE_MULT_CONSTANT;
-    if (volume < 0) {
-        slot->volume = 0;
-        return;
-    }
-
-    if (volume > 0x7FFF) {
-        volume = 0x7FFF;
-    }
-
-    slot->volume = volume;
-
-    if (!distance || (s->flags & NO_PAN)) {
-        slot->pan = 0;
-        return;
-    }
-
-    int16_t angle = phd_atan(
-        slot->pos->z - LaraItem->pos.z, slot->pos->x - LaraItem->pos.x);
-    angle -= LaraItem->pos.y_rot + Lara.torso_y_rot + Lara.head_y_rot;
-    slot->pan = angle;
-}
-
-void mn_stop_sound_effect(int sfx_num, PHD_3DPOS *pos)
-{
-    if (!SoundIsActive) {
-        return;
-    }
-
-    for (int i = 0; i < MAX_PLAYING_FX; i++) {
-        MN_SFX_PLAY_INFO *slot = &SFXPlaying[i];
-        if ((slot->mn_flags & MN_FX_USED)
-            && S_SoundSampleIsPlaying(slot->handle)) {
-            if ((!pos && slot->fxnum == sfx_num)
-                || (pos && sfx_num >= 0 && slot->fxnum == sfx_num)
-                || (pos && sfx_num < 0)) {
-                S_SoundStopSample(slot->handle);
-                mn_clear_fx_slot(slot);
-            }
-        }
-    }
-}
-
-void mn_adjust_master_volume(int8_t volume)
-{
-    MnSoundMasterVolumeDefault = volume & 0x3F;
-    MnSoundMasterVolume = volume & 0x3F;
-}
-
-static void mn_clear_fx_slot(MN_SFX_PLAY_INFO *slot)
-{
-    slot->handle = SOUND_INVALID_HANDLE;
-    slot->pos = NULL;
-    slot->mn_flags = 0;
-    slot->volume = 0;
-    slot->pan = 0;
-    slot->loudness = MN_NOT_AUDIBLE;
-    slot->fxnum = -1;
-}
-
-static void mn_clear_handles(MN_SFX_PLAY_INFO *slot)
-{
-    for (int i = 0; i < MAX_PLAYING_FX; i++) {
-        MN_SFX_PLAY_INFO *rslot = &SFXPlaying[i];
-        if (rslot != slot && rslot->handle == slot->handle) {
-            rslot->handle = SOUND_INVALID_HANDLE;
-        }
-    }
-}
diff --git a/src/game/mnsound.h b/src/game/mnsound.h
deleted file mode 100644
index 2034abcf5..000000000
--- a/src/game/mnsound.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef T1M_GAME_MNSOUND_H
-#define T1M_GAME_MNSOUND_H
-
-#include "global/types.h"
-
-#include <stdbool.h>
-#include <stdint.h>
-
-void mn_reset_sound_effects();
-bool mn_sound_effect(int32_t sfx_num, PHD_3DPOS *pos, uint32_t flags);
-void mn_reset_ambient_loudness();
-void mn_stop_ambient_samples();
-void mn_update_sound_effects();
-void mn_stop_sound_effect(int sfx_num, PHD_3DPOS *pos);
-void mn_adjust_master_volume(int8_t volume);
-
-#endif
diff --git a/src/game/option.c b/src/game/option.c
index a99a6e262..7bee95dfe 100644
--- a/src/game/option.c
+++ b/src/game/option.c
@@ -3,7 +3,6 @@
 #include "config.h"
 #include "game/game.h"
 #include "game/inv.h"
-#include "game/mnsound.h"
 #include "game/requester.h"
 #include "game/settings.h"
 #include "game/sound.h"
diff --git a/src/game/settings.c b/src/game/settings.c
index 63974d962..bed1e3346 100644
--- a/src/game/settings.c
+++ b/src/game/settings.c
@@ -2,8 +2,8 @@
 
 #include "config.h"
 #include "filesystem.h"
-#include "game/mnsound.h"
 #include "game/option.h"
+#include "game/sound.h"
 #include "global/const.h"
 #include "global/types.h"
 #include "global/vars.h"
diff --git a/src/game/setup.c b/src/game/setup.c
index ed8d21159..9d2ca2d98 100644
--- a/src/game/setup.c
+++ b/src/game/setup.c
@@ -43,7 +43,6 @@
 #include "game/items.h"
 #include "game/lara.h"
 #include "game/lot.h"
-#include "game/mnsound.h"
 #include "game/objects/boat.h"
 #include "game/objects/bridge.h"
 #include "game/objects/cabin.h"
@@ -60,6 +59,7 @@
 #include "game/objects/trapdoor.h"
 #include "game/overlay.h"
 #include "game/savegame.h"
+#include "game/sound.h"
 #include "game/text.h"
 #include "game/traps/damocles_sword.h"
 #include "game/traps/dart.h"
diff --git a/src/game/sound.c b/src/game/sound.c
index 43ba07c65..705209f12 100644
--- a/src/game/sound.c
+++ b/src/game/sound.c
@@ -1,12 +1,54 @@
 #include "game/sound.h"
 
-#include "game/mnsound.h"
+#include "3dsystem/phd_math.h"
+#include "game/game.h"
 #include "global/vars.h"
+#include "specific/init.h"
+#include "specific/sndpc.h"
+#include "util.h"
 
 #include <stddef.h>
+#include <stdio.h>
 
 #define FLIPFLAG 0x40
 #define UNFLIPFLAG 0x80
+#define SOUND_RANGE 8
+#define SOUND_RADIUS (SOUND_RANGE << 10)
+#define SOUND_RANGE_MULT_CONSTANT ((int32_t)(32768 / SOUND_RADIUS))
+#define MAX_VOLUME_CHANGE 0x2000
+#define MAX_PITCH_CHANGE 10
+#define MN_NOT_AUDIBLE -1
+
+typedef enum SOUND_MODE {
+    SOUND_WAIT = 0,
+    SOUND_RESTART = 1,
+    SOUND_AMBIENT = 2,
+} SOUND_MODE;
+
+typedef enum SOUND_FLAG {
+    MN_FX_UNUSED = 0,
+    MN_FX_USED = 1 << 0,
+    MN_FX_AMBIENT = 1 << 1,
+    MN_FX_RESTARTED = 1 << 2,
+    MN_FX_NO_REVERB = 1 << 3,
+} SOUND_FLAG;
+
+typedef enum SAMPLE_FLAG {
+    NO_PAN = 1 << 12,
+    PITCH_WIBBLE = 1 << 13,
+    VOLUME_WIBBLE = 1 << 14,
+} SAMPLE_FLAG;
+
+static MN_SFX_PLAY_INFO SFXPlaying[MAX_PLAYING_FX] = { 0 };
+static int32_t MnSoundMasterVolumeDefault = 32;
+static int16_t MnAmbientLookup[MAX_AMBIENT_FX] = { -1 };
+static int32_t MnAmbientLookupIdx = 0;
+
+static MN_SFX_PLAY_INFO *mn_get_fx_slot(
+    int32_t sfx_num, uint32_t loudness, PHD_3DPOS *pos, int16_t mode);
+static void mn_get_sound_params(MN_SFX_PLAY_INFO *slot);
+static void mn_clear_fx_slot(MN_SFX_PLAY_INFO *slot);
+static void mn_clear_handles(MN_SFX_PLAY_INFO *slot);
 
 void Sound_UpdateEffects()
 {
@@ -39,3 +81,395 @@ void Sound_StopEffect(int32_t sfx_num, PHD_3DPOS *pos)
 {
     mn_stop_sound_effect(sfx_num, pos);
 }
+
+void mn_reset_sound_effects()
+{
+    if (!SoundIsActive) {
+        return;
+    }
+    MnSoundMasterVolume = MnSoundMasterVolumeDefault;
+
+    for (int i = 0; i < MAX_PLAYING_FX; i++) {
+        mn_clear_fx_slot(&SFXPlaying[i]);
+    }
+
+    S_SoundStopAllSamples();
+
+    MnAmbientLookupIdx = 0;
+
+    for (int i = 0; i < MAX_SAMPLES; i++) {
+        if (SampleLUT[i] < 0) {
+            continue;
+        }
+        SAMPLE_INFO *s = &SampleInfos[SampleLUT[i]];
+        if (s->volume < 0) {
+            S_ExitSystemFmt(
+                "sample info for effect %d has incorrect volume(%d)", i,
+                s->volume);
+        }
+
+        if ((s->flags & 3) == SOUND_AMBIENT) {
+            if (MnAmbientLookupIdx >= MAX_AMBIENT_FX) {
+                S_ExitSystem("Ran out of ambient fx slots in "
+                             "mn_reset_sound_effects()");
+            }
+            MnAmbientLookup[MnAmbientLookupIdx] = i;
+            MnAmbientLookupIdx++;
+        }
+    }
+}
+
+bool mn_sound_effect(int32_t sfx_num, PHD_3DPOS *pos, uint32_t flags)
+{
+    if (!SoundIsActive) {
+        return false;
+    }
+
+    if (flags != SPM_ALWAYS
+        && (flags & SPM_UNDERWATER)
+            != (RoomInfo[Camera.pos.room_number].flags & RF_UNDERWATER)) {
+        return false;
+    }
+
+    if (SampleLUT[sfx_num] < 0) {
+        return false;
+    }
+
+    SAMPLE_INFO *s = &SampleInfos[SampleLUT[sfx_num]];
+    if (s->randomness && GetRandomDraw() > (int32_t)s->randomness) {
+        return false;
+    }
+
+    flags = 0;
+    int32_t pan = 0x7FFF;
+    int32_t mode = s->flags & 3;
+    uint32_t distance;
+    if (pos) {
+        int32_t x = pos->x - Camera.target.x;
+        int32_t y = pos->y - Camera.target.y;
+        int32_t z = pos->z - Camera.target.z;
+        if (ABS(x) > SOUND_RADIUS || ABS(y) > SOUND_RADIUS
+            || ABS(z) > SOUND_RADIUS) {
+            return false;
+        }
+        distance = SQUARE(x) + SQUARE(y) + SQUARE(z);
+        if (!distance) {
+            pan = 0;
+        }
+    } else {
+        distance = 0;
+        pan = 0;
+        flags = MN_FX_NO_REVERB;
+    }
+    distance = phd_sqrt(distance);
+
+    int32_t volume = s->volume - distance * SOUND_RANGE_MULT_CONSTANT;
+    if (s->flags & VOLUME_WIBBLE) {
+        volume -= GetRandomDraw() * MAX_VOLUME_CHANGE >> 15;
+    }
+
+    if (s->flags & NO_PAN) {
+        pan = 0;
+    }
+
+    if (volume <= 0 && mode != SOUND_AMBIENT) {
+        return false;
+    }
+
+    if (pan) {
+        int16_t angle =
+            phd_atan(pos->z - LaraItem->pos.z, pos->x - LaraItem->pos.x);
+        angle -= LaraItem->pos.y_rot + Lara.torso_y_rot + Lara.head_y_rot;
+        pan = angle;
+    }
+
+    int32_t pitch = 100;
+    if (s->flags & PITCH_WIBBLE) {
+        pitch +=
+            ((GetRandomDraw() * MAX_PITCH_CHANGE) / 16384) - MAX_PITCH_CHANGE;
+    }
+
+    int32_t vars = (s->flags >> 2) & 15;
+    int32_t sfx_id = s->number;
+    if (vars != 1) {
+        sfx_id += (GetRandomDraw() * vars) / 0x8000;
+    }
+
+    if (volume > 0x7FFF) {
+        volume = 0x7FFF;
+    }
+
+    switch (mode) {
+    case SOUND_WAIT: {
+        MN_SFX_PLAY_INFO *fxslot = mn_get_fx_slot(sfx_num, 0, pos, mode);
+        if (!fxslot) {
+            return false;
+        }
+        if (fxslot->mn_flags & MN_FX_RESTARTED) {
+            fxslot->mn_flags &= 0xFFFF - MN_FX_RESTARTED;
+            return true;
+        }
+        fxslot->handle = S_SoundPlaySample(sfx_id, volume, pitch, pan);
+        if (fxslot->handle == SOUND_INVALID_HANDLE) {
+            return false;
+        }
+        mn_clear_handles(fxslot);
+        fxslot->mn_flags = flags | MN_FX_USED;
+        fxslot->fxnum = sfx_num;
+        fxslot->pos = pos;
+        return true;
+    }
+
+    case SOUND_RESTART: {
+        MN_SFX_PLAY_INFO *fxslot = mn_get_fx_slot(sfx_num, 0, pos, mode);
+        if (!fxslot) {
+            return false;
+        }
+        if (fxslot->mn_flags & MN_FX_RESTARTED) {
+            S_SoundStopSample(fxslot->handle);
+            fxslot->handle = S_SoundPlaySample(sfx_id, volume, pitch, pan);
+            return true;
+        }
+        fxslot->handle = S_SoundPlaySample(sfx_id, volume, pitch, pan);
+        if (fxslot->handle == SOUND_INVALID_HANDLE) {
+            return false;
+        }
+        mn_clear_handles(fxslot);
+        fxslot->mn_flags = flags | MN_FX_USED;
+        fxslot->fxnum = sfx_num;
+        fxslot->pos = pos;
+        return true;
+    }
+
+    case SOUND_AMBIENT: {
+        uint32_t loudness = distance;
+        MN_SFX_PLAY_INFO *fxslot = mn_get_fx_slot(sfx_num, loudness, pos, mode);
+        if (!fxslot) {
+            return false;
+        }
+        fxslot->pos = pos;
+        if (fxslot->mn_flags & MN_FX_AMBIENT) {
+            if (volume > 0) {
+                fxslot->loudness = loudness;
+                fxslot->pan = pan;
+                fxslot->volume = volume;
+            } else {
+                fxslot->loudness = MN_NOT_AUDIBLE;
+                fxslot->volume = 0;
+            }
+            return true;
+        }
+
+        if (volume > 0) {
+            fxslot->handle =
+                S_SoundPlaySampleLooped(sfx_id, volume, pitch, pan);
+            if (fxslot->handle == SOUND_INVALID_HANDLE) {
+                mn_clear_fx_slot(fxslot);
+                return false;
+            }
+            mn_clear_handles(fxslot);
+            fxslot->loudness = loudness;
+            fxslot->fxnum = sfx_num;
+            fxslot->pan = pan;
+            fxslot->volume = volume;
+            fxslot->mn_flags |= MN_FX_AMBIENT | MN_FX_USED;
+            fxslot->pos = pos;
+            return true;
+        }
+
+        fxslot->loudness = MN_NOT_AUDIBLE;
+        return true;
+    }
+    }
+
+    return false;
+}
+
+static MN_SFX_PLAY_INFO *mn_get_fx_slot(
+    int32_t sfx_num, uint32_t loudness, PHD_3DPOS *pos, int16_t mode)
+{
+    switch (mode) {
+    case SOUND_WAIT:
+    case SOUND_RESTART: {
+        MN_SFX_PLAY_INFO *last_free_slot = NULL;
+        for (int i = MnAmbientLookupIdx; i < MAX_PLAYING_FX; i++) {
+            MN_SFX_PLAY_INFO *result = &SFXPlaying[i];
+            if ((result->mn_flags & MN_FX_USED) && result->fxnum == sfx_num
+                && result->pos == pos) {
+                result->mn_flags |= MN_FX_RESTARTED;
+                return result;
+            } else if (result->mn_flags == MN_FX_UNUSED) {
+                last_free_slot = result;
+            }
+        }
+        return last_free_slot;
+    }
+
+    case SOUND_AMBIENT:
+        for (int i = 0; i < MAX_AMBIENT_FX; i++) {
+            if (MnAmbientLookup[i] == sfx_num) {
+                MN_SFX_PLAY_INFO *result = &SFXPlaying[i];
+                if (result->mn_flags != MN_FX_UNUSED
+                    && result->loudness <= loudness) {
+                    return NULL;
+                }
+                return result;
+            }
+        }
+        break;
+    }
+
+    return NULL;
+}
+
+void mn_reset_ambient_loudness()
+{
+    if (!SoundIsActive) {
+        return;
+    }
+
+    for (int i = 0; i < MnAmbientLookupIdx; i++) {
+        MN_SFX_PLAY_INFO *slot = &SFXPlaying[i];
+        slot->loudness = MN_NOT_AUDIBLE;
+    }
+}
+
+void mn_stop_ambient_samples()
+{
+    if (!SoundIsActive) {
+        return;
+    }
+
+    for (int i = 0; i < MnAmbientLookupIdx; i++) {
+        MN_SFX_PLAY_INFO *slot = &SFXPlaying[i];
+        if (S_SoundSampleIsPlaying(slot->handle)) {
+            S_SoundStopSample(slot->handle);
+            mn_clear_fx_slot(slot);
+        }
+    }
+}
+
+void mn_update_sound_effects()
+{
+    if (!SoundIsActive) {
+        return;
+    }
+
+    for (int i = 0; i < MAX_PLAYING_FX; i++) {
+        MN_SFX_PLAY_INFO *slot = &SFXPlaying[i];
+        if (slot->mn_flags & MN_FX_USED) {
+            if (slot->mn_flags & MN_FX_AMBIENT) {
+                if (slot->loudness != MN_NOT_AUDIBLE
+                    && slot->handle != SOUND_INVALID_HANDLE) {
+                    S_SoundSetPanAndVolume(
+                        slot->handle, slot->pan, slot->volume);
+                } else {
+                    if (slot->handle != SOUND_INVALID_HANDLE) {
+                        S_SoundStopSample(slot->handle);
+                    }
+                    mn_clear_fx_slot(slot);
+                }
+            } else if (S_SoundSampleIsPlaying(slot->handle)) {
+                if (slot->pos != NULL) {
+                    mn_get_sound_params(slot);
+                    if (slot->volume > 0
+                        && slot->handle != SOUND_INVALID_HANDLE) {
+                        S_SoundSetPanAndVolume(
+                            slot->handle, slot->pan, slot->volume);
+                    } else {
+                        if (slot->handle != SOUND_INVALID_HANDLE) {
+                            S_SoundStopSample(slot->handle);
+                        }
+                        mn_clear_fx_slot(slot);
+                    }
+                }
+            } else {
+                mn_clear_fx_slot(slot);
+            }
+        }
+    }
+}
+
+static void mn_get_sound_params(MN_SFX_PLAY_INFO *slot)
+{
+    SAMPLE_INFO *s = &SampleInfos[SampleLUT[slot->fxnum]];
+
+    int32_t x = slot->pos->x - Camera.target.x;
+    int32_t y = slot->pos->y - Camera.target.y;
+    int32_t z = slot->pos->z - Camera.target.z;
+    if (ABS(x) > SOUND_RADIUS || ABS(y) > SOUND_RADIUS
+        || ABS(z) > SOUND_RADIUS) {
+        slot->volume = 0;
+        return;
+    }
+
+    uint32_t distance = SQUARE(x) + SQUARE(y) + SQUARE(z);
+    int32_t volume = s->volume - phd_sqrt(distance) * SOUND_RANGE_MULT_CONSTANT;
+    if (volume < 0) {
+        slot->volume = 0;
+        return;
+    }
+
+    if (volume > 0x7FFF) {
+        volume = 0x7FFF;
+    }
+
+    slot->volume = volume;
+
+    if (!distance || (s->flags & NO_PAN)) {
+        slot->pan = 0;
+        return;
+    }
+
+    int16_t angle = phd_atan(
+        slot->pos->z - LaraItem->pos.z, slot->pos->x - LaraItem->pos.x);
+    angle -= LaraItem->pos.y_rot + Lara.torso_y_rot + Lara.head_y_rot;
+    slot->pan = angle;
+}
+
+void mn_stop_sound_effect(int sfx_num, PHD_3DPOS *pos)
+{
+    if (!SoundIsActive) {
+        return;
+    }
+
+    for (int i = 0; i < MAX_PLAYING_FX; i++) {
+        MN_SFX_PLAY_INFO *slot = &SFXPlaying[i];
+        if ((slot->mn_flags & MN_FX_USED)
+            && S_SoundSampleIsPlaying(slot->handle)) {
+            if ((!pos && slot->fxnum == sfx_num)
+                || (pos && sfx_num >= 0 && slot->fxnum == sfx_num)
+                || (pos && sfx_num < 0)) {
+                S_SoundStopSample(slot->handle);
+                mn_clear_fx_slot(slot);
+            }
+        }
+    }
+}
+
+void mn_adjust_master_volume(int8_t volume)
+{
+    MnSoundMasterVolumeDefault = volume & 0x3F;
+    MnSoundMasterVolume = volume & 0x3F;
+}
+
+static void mn_clear_fx_slot(MN_SFX_PLAY_INFO *slot)
+{
+    slot->handle = SOUND_INVALID_HANDLE;
+    slot->pos = NULL;
+    slot->mn_flags = 0;
+    slot->volume = 0;
+    slot->pan = 0;
+    slot->loudness = MN_NOT_AUDIBLE;
+    slot->fxnum = -1;
+}
+
+static void mn_clear_handles(MN_SFX_PLAY_INFO *slot)
+{
+    for (int i = 0; i < MAX_PLAYING_FX; i++) {
+        MN_SFX_PLAY_INFO *rslot = &SFXPlaying[i];
+        if (rslot != slot && rslot->handle == slot->handle) {
+            rslot->handle = SOUND_INVALID_HANDLE;
+        }
+    }
+}
diff --git a/src/game/sound.h b/src/game/sound.h
index f9d061b88..ecc6a7c2a 100644
--- a/src/game/sound.h
+++ b/src/game/sound.h
@@ -3,10 +3,19 @@
 
 #include "global/types.h"
 
+#include <stdbool.h>
 #include <stdint.h>
 
 void Sound_UpdateEffects();
 void Sound_Effect(int32_t sfx_num, PHD_3DPOS *pos, uint32_t flags);
 void Sound_StopEffect(int32_t sfx_num, PHD_3DPOS *pos);
 
+void mn_reset_sound_effects();
+bool mn_sound_effect(int32_t sfx_num, PHD_3DPOS *pos, uint32_t flags);
+void mn_reset_ambient_loudness();
+void mn_stop_ambient_samples();
+void mn_update_sound_effects();
+void mn_stop_sound_effect(int sfx_num, PHD_3DPOS *pos);
+void mn_adjust_master_volume(int8_t volume);
+
 #endif