Machaut played on medieval double recorder

Machaut s Puis que ma dolor. The original is a monophonic piece. I picked up the idea of adding a second part to it from Pierre Hamon, who plays this piece on a similar double recorder somewhere here, on the Youtube expanses. Needless to say, his playing is professional, while I am just trying to do my best after a trying day, to demonstrate to a customer what this instrument can do. The arrangement is slightly different from that of Pierre s one. The type of double pipe used has the right pipe playing B