Here's what Handbook had to say about the track, produced in memory of the late jazz/soul musician Terry Callier:
"Terry Callier died recently, something I felt sad about but I didn't really listen to his music. Today I stumbled across a track called "Butterfly". I felt moved and had to make something. I hope you enjoy it, and to those Callier fans, I hope it's a fitting tribute to an artist I need to invest my time in. Bless."
I may need to learn a little bit more about Terry Callier myself. In the meantime, I'm going to go live a little and listen to "Delicate Wings" a few more times.