It's actually surprisingly tricky/subjective to get Doom sounding 'right' on modern devices - the original music was composed for Roland's Sound Canvas 55 and there's a bunch of sample sets out there that attempt to recreate the 'feel' of the SC-55 but nothing that perfectly emulates it (I run FastDoom on my MiSTer with an MT32-Pi and a SC-55-alike sample set and it's good but not perfect).
Of course, most folks never heard the music on a Sound Canvas anyway back in the day so it's all a bit subjective - I wonder what source the National Recording Registry is using for its entry?