To music,
x fadeMusic y
X = The time the music will use to fade
Y = The volume the music should fade into. Default is 0.5
Exsample:
1 fadeMusic 1
This makes the music's volume become 1 in 1 second.
To sound,
Exsactly the same, just the command is fadeSound
x fadeSound y
I dunno about the radio.
These commands can go in scripts/initFields/Triggers/Wp's
Any helpfull?