I'm not 100% sure if I'm correct, but it seems very likely that Karsten might have gotten that Fairlight Marimba sound from a songs or scores disk for Aegis Sonix or Deluxe Music Construction Kit, as a lot of those music disks' instruments were sampled from stuff like Fairlight CMIs, and (probably) Yamaha DX-series synths (or at least FM synths in general), and he probably stumbled upon one of those disks, the disk probably happened to have that Marimba sound, and he might have decided to rip the sound from the disk and put it in ST-01. This seems especially likely to me, because a lot of early mods (especially ones from 1988-89) that had non ST-01 samples usually took the sounds from these Sonix or DMCS song disks, and the drum sounds were usually some of Dynamic Drums' other sounds (besides the ones ripped and used in ST-01). Ok, I know that Dynamic Drums detail wasn't entirely relevant here, but I'm not really sure where else to mention that. Anyways, back to the Marimba sound. I saw a module called "soundfx module" (yes, that's the title. isn't that creative?) and I downloaded it. I was looking through the samples and it had ST-01:Marimba. But something about this version of the sample was different. It sounded a bit...higher quality. I compared it to the normal version of ST-01:Marimba that shows up in most versions of ST-01, and..yep. This version of the sample was indeed higher quality. I then compared both samples again, but this time, at the lower notes, to see if this was just resampled. It wasn't resampled. It was actually at a higher sample rate! So, I think this is a higher quality version of ST-01:Marimba! But, this mod was made by a mod musician by the name of Fermix. I checked this person's demo history on demozoo, and the oldest song of theirs that is on demozoo is from December 1992. (a song called "ana".) But ST-01 is from 1987. So, did this person find the original Fairlight CMI sample set, or did they happen to have a different (possibly the original) version of ST-01 (or at least the Marimba sample)? I don't know! I have attached the two samples on this post.