Hi Mikael

> i'm interested in buying A-100 mini system and A-155 sequencer
> so i'd like to know if i could run A-100 and A-155 both,
> with Nuendo program Pc (Windows XP service pack1)

If you have MIDI/CV interface each sequencer program which is able to
handle MIDI, will be able to talk to the Doepfer system.

Florian
(and btw: please upgrade to Service Pack 2)