Andy:

Well at least you're not going bonkers, I can recreate it on my laptop using the Coyote WT VSTi/DXi Synth.
On my desktop, I use the Cakewalk TTS-1 as suggested by Peter in his "No Brainer" thread, and that works perfectly.
Any chance you'd like to download that and give it a try?

I know it's kind of a pain, and I know Coyote should work, but I don't have any other suggestions,
unless you have the Microsoft GS Wavetable Synth as an option in your "MIDI/Audio Driver Setup" window.
You could try that.

LLOYD S