My first attempt using the Bigmouth bi-quad bandpass filter algorithm. It resulted in a kind of Mellotron style choir sound. The vowel sounds can be adjusted using the first macro.

The cutoff and release macros work together to allow higher frequencies through and lengthen the release.

The chorus is very subtle just using a fast delay style effect.

You can hear the patch as part of my “Learning to play the Osmose” series at my Soundcloud, see below.