This is a copy of a field recording of Moise Robin that was made by Gerard Dole. I haven't listened to it for a while, but I believe all of it is Moise Robin playing alone.
Yes, it's Moise Robin playing alone.
Nout, Gérard put out the CD in 1995 after visiting Moise at his house in Arnaudville. (The whole story is told in the booklet).