We recently performed the CPE Bach Sonata for solo flute, with the accompaniment of the “Ghost” part written by Gary Schocker. We were experimenting with the juxtaposition of the very old music and the very new music, and trying to make the “ghost” part sound quieter and more distant (ghostly). We ended up playing the old music on the modern flute, and the newer “ghost” part on the baroque violin with a mute. We also had the “ghost” stand far away, to increase the idea of a distant echo.
The composer liked it. When we wrote to him for permission , he said “Well, I love it. Please share on YouTube. Violin is much more ghostly than another modern flute.”