Ooh-Ahh is made from the Ooh and Ahh of the previous two examples. They are linked together using linseg in CSound. This joins together two different values for each formant with a straight line (ramp). So first you hear 'Ooh', then the sound changes to ahh as the formants are moved into their new position, then you hear 'ahh'.
First three formant values:
Ooh -> Ahh
F1: 300 -> 730
F2: 850 -> 1100
F3: 2250 -> 2450