The Portland Youth Ensembles, Portland’s outstanding regional youth music performance program, will perform its annual Spring instrumental concert at Merrill Auditorium. Presented by the Osher School of Music, the concert will include: the Portland Youth Symphony Orchestra, conducted by Robert Lehmann, OSOM director of string studies and orchestral activities; the Portland Youth Wind Ensemble, conducted by Will Kinne, OSOM director of bands; the Portland Young People’s String Consort, conducted by Hanna Flewelling, and the Portland Youth Junior Orchestra, conducted by Ferdinand Liva, violin artist faculty member.