The first album of the Cosmic Voices from Bulgaria - “The Choice”, came out in 1994. It marked the beginning of the many other recordings:
2000 – “A Portrait of Nikolai Kaufmann”
Anniversary album of Professor Kaufmann, featuring by " Les Mysteres des Voix Bulgares", "Cosmic Voices of Bulgaria" and choir of ensemble "Pirin". Released by Riva Sound Records.
http://www.amazon.com/portrait-Nikolai-Kaufmann-Mystere-Bulgares/dp/B0011DRBZW
1998 – “Conscious nega (subconscious)”
Recordings with the Japanese accordionist Coba. The CD is released by EMI Music Japan Inc.
https://itunes.apple.com/nz/album/conscious-nega-subconcious/id724662845
1996 “Jewish songs”
Songs arranged by Professor Nikolai Kaufmann. Released by KVZ Music.
1994 “The Choice” – the first album of the choir