U.Play.Plus: U.Play.Plus More Pops -- Melody Plus Harmony (Solo--A, Duet--B/C/D, Trio--C, Quartet--D) with Optional Piano Accompaniment and Optional CD Accompaniment: Trombone/Baritone/Bassoon/Tuba (P

The U.Play.Plus Series, arranged by Victor López (Flex-Ability Series), provides solos, duets, trios, quartets, and larger ensembles with flexible instrumentation.

Each book has a two-line score for every title.

The top line (A) is the melody.

The second line (B, C, or D) may be played as a duet with line A and is one of the four-part harmony lines.

Adding instruments with B, C, and D lines will complete the harmony.