Do we yet have a way to "autocomplete" music from existing music? or from humming to music (music-to-music?)? I am less interested in the "one-shot" approach h

Do we yet have a way to "autocomplete" music from existing music? or from humming to music (music-to-music?)? I am less interested in the "one-shot" approach here with text-to-prompt. I see seamless transitions but that seems like an afterthought.