This is the first sung piece in a Divine Liturgy (unless we have a bishop present).  There are audio files for each of the four harmonies:

• Soprano (highest female part)

• Alto (lower female part)

• Tenor (highest male part, but many women can also sing this range)

• Bass (lowest male part)

I have also included a Youtube link to hear a midi with all four parts along with sheet music (this version is very similar to ours).