Solo Bb Clarinet - Grade 4 - Digital Download SKU: FX.FX073984 Composed by Pascal Proust. Original Composition. Classical, Educational. Solo Part. 4 pages. FLEX Editions - Digital Sheet Music #FX073984. Published by FLEX Editions - Digital Sheet Music (FX.FX073984). A piece for a concert or a contest, of intermediate level, mixing humor and virtuosity. - Pascal PROUST ; A piece to be played from 7 years of practice. ; Instruments: 1 Solo Bb Clarinet.