Wai Notes  Wai Notes is a 2007 album by Dawn McCarthy and Bonnie 'Prince' Billy, credited here as Bonny Billy. It is a collection of demo songs for "The Letting Go" released in 2006. The album comprises recordings on tapes exchanged between Will Oldham and Dawn McCarthy through the mail prior to recording "The Letting Go". It is now out of print, as only 10,000 copies were duplicated.