If your music doesn't get enough "Aahs" and "Oohs", maybe you should try putting them into the actual music? Formant Filter shapes the sound in a similar way to how the vocal tract works, leading to vowel-esque sounds. So, channel your inner robo-Tarzan. Aaaaoooeoeeeoeeeee!
Formant Filter is one of the devices in the Kilohearts Toolbox bundle.