speakers 5.1 - what's in between the PC and the speakers? what amplifier? have you calibrated it (room size, speaker distances etc) ? where encoding/decoding happens? splitting sub to all-else? as sibling comment said, up-converting 2.0 to anything higher is not simple. Even to 2.1
youtube - the audio on youtube is.. not.. quality. i had a friend who used them as best-audio-compression-ever :) maybe, Opposite of all above, It is possible that now you are hearing their garbage that was unheardable before.
games - similar.. it's not an audiofile genre.
Get some proper sound out (e.g. flac or .ape or something) of something that you know how it sounds (piano? voice? some old electronic stuff?) hopeing it's not over-engineered at studio.. and check that. Better, multiple things ..
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speakers 5.1 - what's in between the PC and the speakers? what amplifier? have you calibrated it (room size, speaker distances etc) ? where encoding/decoding happens? splitting sub to all-else? as sibling comment said, up-converting 2.0 to anything higher is not simple. Even to 2.1
youtube - the audio on youtube is.. not.. quality. i had a friend who used them as best-audio-compression-ever :) maybe, Opposite of all above, It is possible that now you are hearing their garbage that was unheardable before.
games - similar.. it's not an audiofile genre.
Get some proper sound out (e.g. flac or .ape or something) of something that you know how it sounds (piano? voice? some old electronic stuff?) hopeing it's not over-engineered at studio.. and check that. Better, multiple things ..