Fire crackling sound that can be triggered [for 20 seconds or as a looping sound] and added to any room.

Also, for dark rooms where reflection might slightly cause minimal visibility of the invisible insert, the invisible insert can be minimized and hidden within any fireplace or larger room item.

TRIGGERS:

"fire" - to play fire crackling sound for only 20 seconds.
"firel" - to loop the fire crackling sound until stopped.

*If wishing to stop the sound while using the looping trigger, type "fire" and it will stop the sound altogether after 20 seconds.