This is an example of how to make a part of a sound loop without the entire sound looping. Just add the begining cue to where you want the loop to begin, and HL will play until that point, then loop from that point. Full instructions are included in the .ZIP. This can be used for radio music or whatever you want. And the button is toggleable. Hope it's useful.
V1.2: Added screen from the map, and replaced the annoying scientist banter with houndeye sounds.
EDIT: there.