About 20 Years ago, I started to built a hurdy-gurdy, but never finished it. This evening, I found some videos of Patty Gurdy explaning her instrument and the Buzzing Bridge.
BTW: I found her solo of “Leaves And Lemons” quite impressive, though some postprocessiong might be involved. And it reminds me of a concert by Rüdiger Oppermann about 7 years ago :) .
Edit 2020-12-07: Michalina Malisz proves it’s possible to play it even hurdy’er :) .