In 1968, Arvo Part essentially went dark. He stopped composing for several years as he entered a period of, as he called it, "artistic reorientation." When he re-emerged, he had a completely new style. One of the major works he created during this time was one that had a particularly appropriate title for him -- Tabula Rasa, or "blank slate." Steve Seel shares it on this week's program, in addition to some other works from the Baltic region, including Estonia's Erkki-Sven Tuur and Latvia's Peteris Vasks.