A Niggun From Sudilkov - 1913
The recording "Yavu Adir" from Sudilkov was made during S. Ansky's second enthographic expedition in 1913, and it was included on a CD entitled "Treasure of Jewish Culture in Ukraine" that was released in 1997.
Recently, I have learned that the Phonoarchive of Jewish Folklore at the Vernadsky National Library of Ukraine has many other recordings from the Sudilkov shul taken during this time period. However, these recordings are still on the original wax cylinders and there are no plans to digitize them in the future due to a lack of funding.
More background on the archives and S. Ansky's enthographic expeditions can be found here.
A recording of the Baal Shem Tov's niggun from the enthographic expeditions to Berditchev in 1913 can be heard here.