The first piece is by the Russian composer Pavel Chesnokov. It is a cantata for male choir and solo Oktavist called Ne Otverzhi Mene or Do Not Reject Me In My Old Age. In it, the Oktavist (Contrabass) soloist must sing a Bb1 (a whole tone below the lowest note on a cello) and has the option to sing down to G1 at the end of the piece.
For me, the section after the Bb1's is the most beautiful. Starting at 3:48, the Oktavist soloist moves in a wave-like motion from Eb2 to Bb3, starting gently then growing to a fortissimo. The rich sound of the Oktavist's chest register is unlike any other kind of singing, and I find it deeply moving.
For all you basses out there - why not sing along and see if you can hit the G1! Good Luck!
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