Listen to Voluntary in A Major on the 100th Psalm, Z. 721 online. Voluntary in A Major on the 100th Psalm, Z. 721 is an Instrumental language song and is sung by Sergei Tsatsorin. Voluntary in A Major on the 100th Psalm, Z. 721, from the album Favourite Encore Pieces, was released in the year 2017. The duration of the song is 3:26. Download Instrumental songs online from JioSaavn.