Help plz. 5.1 speaker problems

[diddydid]

i am unable to hear music files through all 5 speakers, but they all work whe i ran the test on them (rear left, rear right etc) it is much like the problem in this post https://www.techspot.com/vb/all/windows/t-3030-Center-speaker-during-mp3-playback-Possible.html i can not find a download of this platcenter anywhere. WHATS evem weirder to me is, i had this pc hooked up to another set of 5.1 speakers, and they all worked fine on audio files??