It’s nearly impossible to find biographical information for Alexander Alexandrovich Yegorov. Born in 1887, he studied under Azeyev, Klenovsky, Liadov and Sokolov at the Court Chapel, then graduated from the St. Petersburg Conservatory in 1912. Apart from composition, he busied himself with teaching choral and instrumental music in the public schools of St. Petersburg and Mogilev until he was appointed Professor of Music at the Petrograd Conservatory in 1920, where he remained until shortly before his death in 1959. Prior to the Revolution, his choral compositions were mostly sacred in nature; afterwards, he mostly wrote folk and patriotic pieces.
Most of his sacred compositions are lush affairs, but this setting of the Trisagion Hymn seems almost austere, with open fifths and even a good share of unisons.