It had to be either RX21 or MR10.... I too have the sample set from the RX21 - and yes - there are Claps1. Not sure why some of you can't see my Sound Forge waveforms - they are coming up on my screen when I view the posting. Shame really because seeing the original 16 bit waveform along with the 8 bit one is quite interesting.
It's interesting looking at and listening carefully to the ST-01 samples as you start to notice that some have been processed, transposed, truncated etc ie. they are not just samples made directly off the original instruments - they have been played with.
The distortion on some of the percussion is horrendous compaired to the real thing but this has helped to make some of the drum samples sound very punchy.
I also downloaded the data disk from Dynamic Drums and sure enough there are several ST-01 perc samples - the only thing is that they are IDENTICAL to the ST-01 samples and so I now wonder who robbed these samples from which package?? Clearly Dynamic Drums were sampled so although this is interesting it still doesn't help to answer which studio gear was sampled in the first place.
Cheers,
Dan.