heyjude

Hi, does anyone know how I could get a sound going for the "Life's Been Good" Joe Walsh synth? It's the part at 2:50. Its an Arp Odyssey and the tricky part is that every key on the keyboard is set to play an A but the resonance filter tracks the keys. The melody is basically played on different resonant frequencies of the A. Does anyone have any idea how to do that on their PX-5s? Thanks alot! -Jude