Unity engine. Nope, no audio middle ware. Perhaps typical music may not make sense, but some environmental sounds that sell the vibe of an enemy compound at night, if that brings any ideas :D
https://drive.google.com/drive/folders/1D3t2HrOxoDONW3UBvxn9r3a5DR68CuM1?usp=sha... here couple ideas. Today is already late. Tomorrow hopefully I came up with something useful.