It appears you've missed all the points I made.toaplan_shmupfan wrote:By "sharper", I mean the musical definition, that they sound higher in pitch than the original arcade. If the emulated game has more high frequency output (i.e, more treble) than the original arcade or console version of the game, I would then use the term "brighter".
So if the sound is sharper than the original game, it's an obvious difference. If the sound is brighter, it could be a limitation of the original arcade machine or console vs. the emulated sound output from the machine running an emulation, but there is still a difference.
If the emulator you are using is up-sampling, then don't blame emulation in general. Again, look at drivers used by MAME that are rated "good":
http://maws.mameworld.info/maws/srch.php?stat=1
Then go play these with some decent sound equipment that provides some sort of equaliser function, and not tinny PC or TV built-in speakers.
And stop harping on emulation in general because you've played some poor PS2 ports.