Solo Clarinet with Flexible Clarinet Quartet - Solo Clarinet, Part 1 Bb Clarinet, Part 2 Bb Clarinet, Part 3 Bb or Alto Clarinet, Part 4 Bb Clarinet, Alto Clarinet or Bass Clarinet. As part of an ever expanding series of clarinet solos with clarinet ensemble, we are pleased to make this perennial favourite available. The ensemble is flexible and works well with four Bb flutes, but parts for alto and bass clarinet are included expanding the range and depth. The ensemble parts are about grade 4 standard. A great favourite.