Hmm, you're asking difficult questions here. That friend of mine who introduced me to both goa trance and Impulse Tracker gave me his entire sample library (most of which was quite useless tbh) and I couldn't in any way tell where all those samples were from. I do remember we found some websites with useful sample packs, so there's the source of most of the sounds in my tracks. Of course I couldn't tell which synths and drum machines the sounds are from; I did rename all of my samples for the sake of organisation, so the original file names are lost to time. There are some hints in some of the file names, but of course you have to remember that back in 98/99, I had absolutely no idea what words and numbers like "acid", "juno", "303", "909", and so on even meant. They were all just useful sounds to me