I spent years messing with my Alpha Juno but couldn't create that sound till the other week - I found some parameter settings on the net. I don't have em with me but here's the rough guide...

Set the wave forms to PWM Square (3 I think) and PWM Saw (also 3 I think) and the Sub on (3 I think - don't think this is PWM editable), noise off.

Then set the PWM rate to about 100, same for chorus. I think you need set the PW/PWM rate quite high (100-127).

Set the LPF filter to off (cutoff 127, resonance 0, env 0) and HPF to off.

Set the VCA envelope to gate (GT).

Now here's the real trick to making it 'hoover'...

It's all to do with the envelope affecting the pitch. Set the DCO Env Amt to 64 and type to standard "|\-\" or "D|\-\" (so you can affect the amount via the velocity).

Now setup the envelope - it should be a fast attack (0-48) to full (127). Then an initial fast decay (roughly 50) to 1/2 way (64) then a slower decay (60ish) to closed sustain (0 - the actual note pitch) and zero release time.

Hope this helps! ;)