How to add custom music?

[The_Gl!tch.exe]

I'm currently creating a trade map and I want to play some background music in each specific room.
It should be played separately so others outside the specific area can't hear it. I've tried with a point_clientcommand (as suggested by the community) but it doesn't work perfectly.
anyone know how to do it? (I already have trigger_multiple brushes covering the areas where the sounds should play)

 

[radarhead]

You could try packing the sound into the map files, and playing it with an ambient_generic entitiy.