!!MUSIC(wilderness.mid V=100 L=1 C=1 T=mud U=http://neomud.kyndig.com/sounds/wilderness.mid)
!!SOUND(drink.wav V=100 L=1 P=50 T=mud U=http://neomud.kyndig.com/sounds/drink.wav)
These were taken from the game when I turned on echo MSP triggers.
The buffer will limit the chars, but you can use MPECHO and MPECHOAT to trigger, but only if the player has enabled Allow Inline MSP.