The sound changes of MP40 in different environments
https://youtu.be/8ulbj9nrvUM

1.4.8
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1. Adjusted some sounds for better sound experience.
2. Added some new sounds from reality.
3. Improved First-Person mod now is no longer added by default. You need open steamapps/workshop/400750/2829617084/Resource/Mod_Improved First-Person.pak this file to manually unzip the files to the resource folder and replace the original files to enable. For some people's preferences and solved well some resulting compatibility issues.
4. Fixed some feedback issues.

1.4.7
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1. Further and greatly optimized the scripts.
2. Added some new sounds from reality.
3. Fixed the exaggerated AA cannon smoke.
4. Sound adjustments and improve the experience.

1.4.6
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1. The dead soldiers will remain in the game longer.
2. The swarms of flies now have a chance to spawn near dead soldiers.
3. Fixed the issue that some vehicles still made MG sounds after being destroyed.
4. Fixed the issue that the visual effects of large rockets were incorrect.
5. Optimized new explosion visual effects to make them look better.
6. Adjusted the reverb volume.
7. Fixed several sound issues.

1.4.5
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1. Compatibility update for MACE.
2. The Improved First-Person mod has been integrated for better compatibility with each other.(https://steamcommunity.com/sharedfiles/filedetails/?id=2788836698)
3. Added FPP mode kill feedback sound. (These are actually human-voices, so there's only a certain chance that it will play. If anyone knows a better way please tell me.)
4. Reduced stuttering and Improve the fluency of the game MP mode.
5. Improved the texture of the Soviet female soldiers and made them closer to the vanilla color.
6. Made some tweaks to some sounds.
7. Fixed several issues.

1.4.4
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1. Compatibility update for Valour mod‘s new units.
2. Added new sounds for certain AA guns like Oerlikon.
3. Added new MG34/ZB37/MAC31 MG sounds. All recordings were from live ammunition shooting.
4. Added new sounds for bullets hitting the ground and objects. All recordings were from live ammunition shooting.
5. Improved bullet flight sound.
6. Improved the sound of characters being hit.
7. Fixed crashes on newly added maps.
8. Fixed several grass texture issues.
9. Fixed incorrect M1917 MG sound.
10. New modular compression package. Now you can easily and cleanly delete the parts which you don't like.
note: It may cause the MP mode to be out of sync and every time when updated these deleted files will come back again.
You only need open steamapps/workshop/400750/2829617084/Resource/ this folder directory and remove the following ones that you don't want.
Map_Room_Conflict，Map_Alps，Map_Ancient_Memphis（Extra maps） / Entity_Grass（HD grass） / Music_Silent（Music mute） / Sound_Silent（For the sounds to work properly, this should not delete it.） / Entity_Soviet_Female（Soviet female soldiers） / Interface_Music_Video（Interface and music） / Mod_Realistic Graphics（Realistic Graphics Mod. Delete it could reduce image performance requirements） / Sound_Voice（Character voice）

1.4.3
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1. Compatibility update for 1.028.
2. Optimized and streamlined many sound scripts.
3. Added 12 new explosion visual effects. The explosion is richer and more varied now.
4. Added 2 tank explosion visual effects for light and medium tank.
5. Improved and optimized explosion VFX.
6. Improved and reduced the duration of smokes.
7. Fixed a visual effect of bullet shells dropped in water issue.
8. Greatly reduced the probability of the new map appearing in Conquest mode.
9. Adjusted the volume of several sounds.