Synthesizer with duophonic mode (like e.g. Moog Subsequent 25)

[bobbyturban]

Hello everyone,

is there a something like a duophonic mode in ableton´s stock synths?
Or is there a max device that offers this feature?

In the manual of the Moog Subsequent 25 this feature is described like this:
"Duo Mode allows Oscillator 1 to follow the pitch of one key, while Oscillator 2 can follow the pitch of a second, different key at the same time. If only one key is played while in Duo Mode, both Oscillators track the pitch of that key, but if an additional key is played at the same time, Oscillator 1 and Oscillator 2 will each track a different key."