Electronic Muisc Laboratories EML-500

via this auction
"The circuit design and componenets used were very different from what most of the other companies were doing. If you want something truely different sounding, this is it. It might have a generic appearance similar to that of the Arp Odyssey or Octave Cat but believe me, this sound nothing similar to either of those. EML synths are probably best described as 60's sci-fi movie meets science lab sounding. I recorded a couple of clips of this synth with the envelope repeat on (droning). It can do a lot more than these clips, I just already had these recorded.

EML1 by Rodman Serling
Eml2 by Rodman Serling

In addition to the individual circuits sounding very unique (oscillators, Filter, VCA) it is a very feature-rich synth and include many unique features. It has microtonal tuning so you can tune it to a different scale. The sample+hold circuit is very unique and doesn't sound like any other I've heard. It has 2 oscillators and noise/input. I love overdriving it by running one of the outputs back into the input (as you can see in the pictures), but you can run your voice, a drum machine or whatever through the input and process it through the pre-amp/filter/ring-amplitude mod/VCA. I envelope can self trigger for drones. Did I mention the ring mod circuit will also do amplitude modulation? You can route the sample+hold and LFO to multiple desitnations concurrently. The filter is a multi-mode meaning it will do standard low pass as well as high pass and band pass. The filter is also very unique sounding."