There is 1000-voices mixed choir was created in Engels, Russia in 2014. This choir has performed at various celebrations. Rachmaninov's "Clory of nation" op.13 #1 was in choir's repertoire in 2014 year. In the original Sergey Rachmaninov wrote this chorus for women choir, but 1000-voices is mixed. So, conductor wanted me to add a baritone part in Rachmaninov's score.