I've got some interesting results with cross-modulation of VCOs before but I'll be honest I really don't know what I'm doing.
-- wishbonebrewery

Honestly, and even if this is not the only one, it's also one of the interests and pleasures of modular ;)

'On ne devrait jamais quitter Montauban' (Fernand Naudin).
https://soundcloud.com/petrus-major/tracks