Mod Sources OSC1/2 PCH?

I’ve been playing around with the Programmable Mod Sources but can’t seem to fathom how the OSC1 or OSC2 PITCHES work as a MOD sources?

I understand that it is not FM but how does the Pitch of the OSC create modulation?

Some info at this thread …

http://forum.moogmusic.com/viewtopic.php?f=7&t=22366

Thanks BaldEagle! :wink:

I guess it’s like keytracking then - with lower notes causing slower modulation and higher notes speeding it up?