diff --git a/core/assets/sounds/artillery.ogg b/core/assets/sounds/artillery.ogg
index d9f8dbd38a..e3651f5ce1 100644
Binary files a/core/assets/sounds/artillery.ogg and b/core/assets/sounds/artillery.ogg differ
diff --git a/core/assets/sounds/back.ogg b/core/assets/sounds/back.ogg
index 44f6280572..381cf83079 100644
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diff --git a/core/assets/sounds/bang.ogg b/core/assets/sounds/bang.ogg
index 31e723b1c9..afbd099e6f 100644
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diff --git a/core/assets/sounds/beam.ogg b/core/assets/sounds/beam.ogg
index 9e21098e3e..9b39f2363c 100644
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diff --git a/core/assets/sounds/bigshot.ogg b/core/assets/sounds/bigshot.ogg
index 4e9cf2f675..3218eec651 100644
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diff --git a/core/assets/sounds/boom.ogg b/core/assets/sounds/boom.ogg
index e74d7ada92..4cce577fe9 100644
Binary files a/core/assets/sounds/boom.ogg and b/core/assets/sounds/boom.ogg differ
diff --git a/core/assets/sounds/break.ogg b/core/assets/sounds/break.ogg
old mode 100755
new mode 100644
index db84b08bc2..30ca95aea2
Binary files a/core/assets/sounds/break.ogg and b/core/assets/sounds/break.ogg differ
diff --git a/core/assets/sounds/build.ogg b/core/assets/sounds/build.ogg
index df34ee9823..8235d41eb9 100644
Binary files a/core/assets/sounds/build.ogg and b/core/assets/sounds/build.ogg differ
diff --git a/core/assets/sounds/buttonClick.ogg b/core/assets/sounds/buttonClick.ogg
old mode 100755
new mode 100644
index 610f7cdeb7..5f225eadcc
Binary files a/core/assets/sounds/buttonClick.ogg and b/core/assets/sounds/buttonClick.ogg differ
diff --git a/core/assets/sounds/click.ogg b/core/assets/sounds/click.ogg
old mode 100755
new mode 100644
index d17d6e6322..4960f9098f
Binary files a/core/assets/sounds/click.ogg and b/core/assets/sounds/click.ogg differ
diff --git a/core/assets/sounds/conveyor.ogg b/core/assets/sounds/conveyor.ogg
index d61775acc5..9f989d70d0 100644
Binary files a/core/assets/sounds/conveyor.ogg and b/core/assets/sounds/conveyor.ogg differ
diff --git a/core/assets/sounds/corexplode.ogg b/core/assets/sounds/corexplode.ogg
index af4c02ebed..b26ff4a64c 100644
Binary files a/core/assets/sounds/corexplode.ogg and b/core/assets/sounds/corexplode.ogg differ
diff --git a/core/assets/sounds/door.ogg b/core/assets/sounds/door.ogg
old mode 100755
new mode 100644
index 0556a19a47..121b3c3037
Binary files a/core/assets/sounds/door.ogg and b/core/assets/sounds/door.ogg differ
diff --git a/core/assets/sounds/drill.ogg b/core/assets/sounds/drill.ogg
index 2ea598c6ff..6aab153a47 100644
Binary files a/core/assets/sounds/drill.ogg and b/core/assets/sounds/drill.ogg differ
diff --git a/core/assets/sounds/empty.ogg b/core/assets/sounds/empty.ogg
index 212bc03189..6c7ecbe8e0 100644
Binary files a/core/assets/sounds/empty.ogg and b/core/assets/sounds/empty.ogg differ
diff --git a/core/assets/sounds/explosion.ogg b/core/assets/sounds/explosion.ogg
index 0d920dc5cc..7c7f2c43da 100644
Binary files a/core/assets/sounds/explosion.ogg and b/core/assets/sounds/explosion.ogg differ
diff --git a/core/assets/sounds/explosionbig.ogg b/core/assets/sounds/explosionbig.ogg
index c36442948b..30cb7933f0 100644
Binary files a/core/assets/sounds/explosionbig.ogg and b/core/assets/sounds/explosionbig.ogg differ
diff --git a/core/assets/sounds/fire.ogg b/core/assets/sounds/fire.ogg
index 55c762b514..0201ee8ea4 100644
Binary files a/core/assets/sounds/fire.ogg and b/core/assets/sounds/fire.ogg differ
diff --git a/core/assets/sounds/flame.ogg b/core/assets/sounds/flame.ogg
index 6f89168ecc..ef203e0524 100644
Binary files a/core/assets/sounds/flame.ogg and b/core/assets/sounds/flame.ogg differ
diff --git a/core/assets/sounds/flame2.ogg b/core/assets/sounds/flame2.ogg
index 9b3282661b..812774a6e6 100644
Binary files a/core/assets/sounds/flame2.ogg and b/core/assets/sounds/flame2.ogg differ
diff --git a/core/assets/sounds/laser.ogg b/core/assets/sounds/laser.ogg
index 9ae4862a85..3a727c5053 100644
Binary files a/core/assets/sounds/laser.ogg and b/core/assets/sounds/laser.ogg differ
diff --git a/core/assets/sounds/laserbig.ogg b/core/assets/sounds/laserbig.ogg
index f0f2b9fdd2..4aa6658cf6 100644
Binary files a/core/assets/sounds/laserbig.ogg and b/core/assets/sounds/laserbig.ogg differ
diff --git a/core/assets/sounds/machine.ogg b/core/assets/sounds/machine.ogg
old mode 100755
new mode 100644
index d6f7aceae8..42429721a0
Binary files a/core/assets/sounds/machine.ogg and b/core/assets/sounds/machine.ogg differ
diff --git a/core/assets/sounds/message.ogg b/core/assets/sounds/message.ogg
old mode 100755
new mode 100644
index a466296685..2db223d24e
Binary files a/core/assets/sounds/message.ogg and b/core/assets/sounds/message.ogg differ
diff --git a/core/assets/sounds/missile.ogg b/core/assets/sounds/missile.ogg
index 89c7e2b310..eb13976d87 100644
Binary files a/core/assets/sounds/missile.ogg and b/core/assets/sounds/missile.ogg differ
diff --git a/core/assets/sounds/pew.ogg b/core/assets/sounds/pew.ogg
index f31519da5d..0c1df7f711 100644
Binary files a/core/assets/sounds/pew.ogg and b/core/assets/sounds/pew.ogg differ
diff --git a/core/assets/sounds/place.ogg b/core/assets/sounds/place.ogg
index c7b02a2981..ff1d05c211 100644
Binary files a/core/assets/sounds/place.ogg and b/core/assets/sounds/place.ogg differ
diff --git a/core/assets/sounds/press.ogg b/core/assets/sounds/press.ogg
index 0ba6e71a64..419cd38847 100644
Binary files a/core/assets/sounds/press.ogg and b/core/assets/sounds/press.ogg differ
diff --git a/core/assets/sounds/release.ogg b/core/assets/sounds/release.ogg
index f7c741a2eb..89efd2ca2e 100644
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diff --git a/core/assets/sounds/respawn.ogg b/core/assets/sounds/respawn.ogg
index 8150b98273..b194989ebf 100644
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diff --git a/core/assets/sounds/respawning.ogg b/core/assets/sounds/respawning.ogg
index de3946833c..cc0e4332f8 100644
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diff --git a/core/assets/sounds/shoot.ogg b/core/assets/sounds/shoot.ogg
index 3800c683dc..d4b1c791c6 100644
Binary files a/core/assets/sounds/shoot.ogg and b/core/assets/sounds/shoot.ogg differ
diff --git a/core/assets/sounds/shootBig.ogg b/core/assets/sounds/shootBig.ogg
index d777385a96..9bc3bf055d 100644
Binary files a/core/assets/sounds/shootBig.ogg and b/core/assets/sounds/shootBig.ogg differ
diff --git a/core/assets/sounds/shootSnap.ogg b/core/assets/sounds/shootSnap.ogg
index b28ba791a3..fc692486a0 100644
Binary files a/core/assets/sounds/shootSnap.ogg and b/core/assets/sounds/shootSnap.ogg differ
diff --git a/core/assets/sounds/shotgun.ogg b/core/assets/sounds/shotgun.ogg
index 81f9aa24ac..47d5213579 100644
Binary files a/core/assets/sounds/shotgun.ogg and b/core/assets/sounds/shotgun.ogg differ
diff --git a/core/assets/sounds/spark.ogg b/core/assets/sounds/spark.ogg
index 20c96353e0..ac61a476de 100644
Binary files a/core/assets/sounds/spark.ogg and b/core/assets/sounds/spark.ogg differ
diff --git a/core/assets/sounds/splash.ogg b/core/assets/sounds/splash.ogg
index be0155f52b..4b6e5eec53 100644
Binary files a/core/assets/sounds/splash.ogg and b/core/assets/sounds/splash.ogg differ
diff --git a/core/assets/sounds/spray.ogg b/core/assets/sounds/spray.ogg
index f47dbe236b..7bddeb6685 100644
Binary files a/core/assets/sounds/spray.ogg and b/core/assets/sounds/spray.ogg differ
diff --git a/core/assets/sounds/thruster.ogg b/core/assets/sounds/thruster.ogg
old mode 100755
new mode 100644
index 46c4a2c5fc..d8e7efb086
Binary files a/core/assets/sounds/thruster.ogg and b/core/assets/sounds/thruster.ogg differ
diff --git a/core/assets/sounds/unlock.ogg b/core/assets/sounds/unlock.ogg
old mode 100755
new mode 100644
index d3abf15026..7149b695be
Binary files a/core/assets/sounds/unlock.ogg and b/core/assets/sounds/unlock.ogg differ
diff --git a/core/assets/sounds/wave.ogg b/core/assets/sounds/wave.ogg
index 638d3afc8f..bf74702474 100644
Binary files a/core/assets/sounds/wave.ogg and b/core/assets/sounds/wave.ogg differ
diff --git a/core/assets/sounds/windowHide.ogg b/core/assets/sounds/windowHide.ogg
old mode 100755
new mode 100644
index 4c7b40285f..9039d4e3b4
Binary files a/core/assets/sounds/windowHide.ogg and b/core/assets/sounds/windowHide.ogg differ
diff --git a/core/convert_sounds.sh b/core/convert_sounds.sh
index 14d4ef881e..02db793811 100755
--- a/core/convert_sounds.sh
+++ b/core/convert_sounds.sh
@@ -1,5 +1,12 @@
 #convert from stereo to mono
-for i in assets/sounds/*.ogg; do
+cd assets/sounds/
+for i in *.ogg; do
   echo $i
-  ffmpeg -i "$i" -y -ac 1 "$i"
+  ffmpeg -i "$i" -ac 1 "OUT_$i"
 done
+
+find . -type f ! -name "OUT_*" -delete
+
+for file in OUT_*; do mv "$file" "${file#OUT_}"; done;
+
+cd ../../