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 etc.
Since 1980's Vahagn is the leader of his Jazz Trio and Quartet in Yerevan, since 1998 he is the pianist and keyboard player of Armenian Navy Band. In 2004 he created his own band “Katuner” (the "Cats").
Vahagn Hayrapetyan's first solo album “Singin” and Swingin” was recorded in 2010.
Vahagn often performs in Moscow jazz clubs 'Esse'. He performs with Russian jazz musicians such as Igor and Oleg Butman, Sergey Golovnya, Yakov Okun, Sergey Vasilyev, Pavel Temofeev, Peter Vostokov and others. He also has collaborated with Russia's jazz pianist Daniil Kramer and their first duo album “Live in Yekaterinburg” was released in 2013.