Airs Monday, July 23, 2018, at 1 p.m. This week the San Francisco Symphony Orchestra organist Cameron Carpenter joins maestro Michael Tilson Thomas for Ice Field, a new work by H. Brant, commisioned by the San Francisco Symphony for Organ and Orchestra. Then maestro Michael Tilson Thomas leads the orchestra in Bach's Brandenburg Concerto No. 3 in G major and the concert conludes with Tchaikovsky's Symphony No. 5 in E minor, Opus 64.