>>12008250
Had a look at it, the menu theme and some in-game sfx can be reencoded to .dsp files pretty easy, gives a slight improvement, but the in-game OST is using .samp/.info files which are harder to work on.
In DC these used .MLT files which were kinda like MIDI for the DC hardware, those hold samples + instructions on what to play, different effects to use etc.
GC .samp/.info is similar but for GC hardware, apparently the .samp files can have their .dsp sample data changed with some tools, but afaik one of the complaints with GC is music had some effects/instruments removed entirely, would take some work to recreate those from DC accurately.
(also didn't have much luck finding working tools for the DC .MLT files, there's some ancient stuff made for python2 that can convert to .DSF but wasn't able to run that properly, theres also a pack of .DSF files pre-converted but they were all renamed different to the game files ;_;)
I'd guess if the samples can be taken from MLT -> converted to WAV -> converted to DSP -> injected into .samp that would help a bit, really I never noticed too much wrong with the in-game OST myself though, the menu OST is probably the one that was hit worst (and gets compared in all the YT videos), but that can have .dsp of it switched pretty easily.