Not fm, just a rare analog monosynth. it does have an interesting filter configuration though which you can probably adequately replicate using the neighbor function on the a4.

http://www.vintagesynth.com/misc/synton_syrinx.php[/quote]
Yes someone was selling one on Craigslist here in Los Angeles for months for $7000. Someone told me it was a true Formant Synth that requires insane amounts of maintenance.