Gary Lanier: COME, CHRISTIANS, JOIN TO SING (Duet Bb Clarinet & Piano with Parts) for Piano,Clarinet written by Trad. Spanish Melody. The format of this sheet music is Score,Solo Part and it’s published by The Lanier Company. Gary Lanier: COME, CHRISTIANS, JOIN TO SING (Duet Bb Clarinet & Piano with Parts) is part of the following sheet music categories: Christian,Contemporary Christian,Sacred,Praise & Worship,General Worship.