Help about IMUSE like script

[rmonic79]

hello, i would like to add and remove instrument in certain point of the game. Is there a way to run multiple audio track of the same duration and mute or unmute on event within the script? i didn't find it in the manual but perhaps someone has found a way to do this. Maybe i can use setRoomLocation or Audiochannel.volume but i don't know if the sync beetween track will be accurate.

EDIT: i solved using an ambient music adding two sound at 0 volume of two different instrument and rising volume when the player walks on a certain region. For now it works really well. I wonder if exist the possibility that the sync may get lost for reasons i can't recognize. i'm using wav file. thanks for the answers