Romualdas Gražinis (* 1962), the head of the AIDIJA Chamber Choir, studied choral conducting in M. K. Čiurlionis Secondary School of Art in Vilnius, the Lithuanian State Conservatoire. Later on, he studied Gregorian chant at the Paris Conservatoire and conducting at the Boulogne-Billancourt Conservatoire (under Prof. P. Calmelet). In 1994, he attended a conducting masterclass at the Royal Academy of Music in Copenhagen, under the guidance of P. Phillips, a renowned British expert of early choral music.

In 1982, Gražinis joined the Vilnius New Music Ensemble. In 1985–1987, while serving in the army, he organized the wind instrument orchestra and early music ensemble. In 1989–1995, he was a member of Cantores Chorales Capellae St. Casimiri at the Vilnius Cathedral. In 1993–1998 and 2005–2006, he served as singing instructor at Vilnius St. Joseph’s Seminary. In 2006–2016, he was a member and first cantor of Schola Cantorum Vilnensis.

Since 1983, Gražinis has taught choral conducting at the National M.K. Čiurlionis Art School where he also served as a choirmaster. Since 1994, he has served as the artistic director and conductor of the senior students Mixed Choir. Moreover, he regularly conducts at the Lithuanian Song Festivals. In 2013, the Government of the Republic of Lithuania awarded Gražinis the Culture and Art Prize. Today, his former tutees study and conduct widely around the world.