dopus set sound <event> <file> <volume>

This command allows you to set the sound for the specified  event .

 volume  is the playback volume, allowable values are from
0 (minimum) to 64 (maximum).

For example,
        + dopus set sound Startup 'DOpus5:Sounds/Danger.8svx' 64


See also:

 dopus query 
 dopus query sound 
 dopus set