A player can type the command /vm into chat to display a menu that allows them to set volume overrides for players in the server. Overrides can be set for invidual players or globally for all players ...
copy sourcemod_windows\bin\sourcemod.logic.dll server_files_windows\addons\sourcemod\bin\ /Y copy sourcemod_windows\bin\sourcemod_mm.dll server_files_windows\addons\sourcemod\bin\ /Y copy ...