I recently came across a guy called Luke Daniels; he is a folk singer,
arranger and songwriter.  He is using a modified 19-5/8" Polyphon and
a computer controlled sequencer to produce new music.

As part of his show, he also sings, plays the guitar and a melodeon to
accompany original Polyphon discs.  He explains his work in a YouTube
video at https://www.youtube.com/watch?v=2WA5t9VuUoQ 

Steve Greatrex
Plymouth (UK)