The main features of the omnichord are the organ like chord instrument together with the unique sonic strings, which are triggered using one of the 36 soft buttons (denoting each of the major, minor and 7th chords) and the strumplate.
Another attempt. I used the AdventureKid n°0086 for both OSC.
Try to play with LFO's. The first one is assigned to OSC2 (for the Doppler effect), the second to phase. Sounds better under C5. I didn't focus to the filter and envelloppe, but it can be copied from my previous B3.