No offense, but do you even play SH? Always referring to SC or DotA, and many comments do not make sense in SH, and you don't even know the BG music which was played practically forever? Just wondering, you seem to know a lot about the predecessors, but that knowledge do not extraprolate accurately here, almost never.
Did you even EXTRACT the APK file of Soul Hunters EVEN ONCE???
Because if you open that file(Like WinRAR); you will see the ONE music file called stage_select_bgm.
THAT is the same music I uploaded as reference (It counts ALL platforms: DA, SH, SC - ALL have same file)