Just got round to searching the Balkfolk site. There seems to be an awful lot of folk orchestra stuff in there, but look what I found on Page 9.

160800 - Voice from Eternity
Artist: Valia Balkanska
Label: SPK Shipka

"The CD `Voice from Eternity` (Glas ot vechostta) consists of 14 folklore songs performed by the great Bulgarian folklore singer Valia Balkanska. The song 'Delyu Became a Haidouk' (Izlel e Delyu haidutin) performed by Valia Balkanska is included in the gold-plated gramophone record sent by astronomers as a message to space containing the voices, whispers, songs and music pieces of our planet."

That has got to be worth 10 euros of anyone's money, and a damned sight more besides.