Lower the sound volume even further after ddnet#4568

In my non-representative survey, I found that my own sound settings are
at 9 for global volume and 100 for the rest, and for a newbie, it was ~30
for all settings. This should be equivalent given 0.3*0.3=0.09.

CC ddnet#4567
CC ddnet#4568

Author: heinrich5991

src/engine/shared/config_variables.h

@@ -79,12 +79,12 @@ MACRO_CONFIG_INT(SndBufferSize, snd_buffer_size, 512, 128, 32768, CFGFLAG_SAVE |
 MACRO_CONFIG_INT(SndRate, snd_rate, 48000, 0, 0, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Sound mixing rate")
 MACRO_CONFIG_INT(SndEnable, snd_enable, 1, 0, 1, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Sound enable")
 MACRO_CONFIG_INT(SndMusic, snd_enable_music, 0, 0, 1, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Play background music")
-MACRO_CONFIG_INT(SndVolume, snd_volume, 100, 0, 100, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Sound volume")
+MACRO_CONFIG_INT(SndVolume, snd_volume, 30, 0, 100, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Sound volume")
 MACRO_CONFIG_INT(SndDevice, snd_device, -1, 0, 0, CFGFLAG_SAVE | CFGFLAG_CLIENT, "(deprecated) Sound device to use")
-MACRO_CONFIG_INT(SndChatSoundVolume, snd_chat_volume, 100, 0, 100, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Chat sound volume")
-MACRO_CONFIG_INT(SndGameSoundVolume, snd_game_volume, 100, 0, 100, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Game sound volume")
+MACRO_CONFIG_INT(SndChatSoundVolume, snd_chat_volume, 30, 0, 100, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Chat sound volume")
+MACRO_CONFIG_INT(SndGameSoundVolume, snd_game_volume, 30, 0, 100, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Game sound volume")
 MACRO_CONFIG_INT(SndMapSoundVolume, snd_ambient_volume, 30, 0, 100, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Map Sound sound volume")
-MACRO_CONFIG_INT(SndBackgroundMusicVolume, snd_background_music_volume, 50, 0, 100, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Background music sound volume")
+MACRO_CONFIG_INT(SndBackgroundMusicVolume, snd_background_music_volume, 30, 0, 100, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Background music sound volume")
 
 MACRO_CONFIG_INT(SndNonactiveMute, snd_nonactive_mute, 0, 0, 1, CFGFLAG_SAVE | CFGFLAG_CLIENT, "")
 MACRO_CONFIG_INT(SndGame, snd_game, 1, 0, 1, CFGFLAG_SAVE | CFGFLAG_CLIENT, "Enable game sounds")