Vahagn Hayrapetyan was born in Yerevan in the family of fiddler Karapet Hayrapetyan and Alice Adamyan. He graduated from the music school after Pyotr Tchaikovsky and Yerevan State Conservatory as pianist and composer. Vahagn learned from Barry Harris and Frank Hewitt in New York City and worked and performed with many prominent jazz musicians such as Elvin Jones, Jimmie Lovelace, Leroy Williams, Ari Roland, Zaid Nasser, Chris Byears, Yaala Baalin, Keith Baala, Jason and Delfeo Marsalis and many more.
In New Orleans Vahagn recorded and released three albums:
- "Love for sale" with Clarence Johnson III
- "Tripp to New Orleans" with Johnny Vidakovich and Ed Wise
- "Bop it up" with Wendell Brunious,Brice Winston, Bill Huntington and Jason Marsalis
Vahagn took part in many international jazz festivals - Jazz Jamboree
, St. Petersburg International Jazz Festival, Moscow vocal International Jazz Festival, New Orleans Jazz Fest du Maurier, Montreal Jazz Festival