Major Baltic choral composers and conductors, such as Estonia's Gustav Ernesaks (1908-1993) were a driving force behind preserving this Baltic tradition through the twentieth century.
Since 2004 the UW Libraries has been developing a collection of Baltic choral music scores, sheet music, recordings, festival song books and programs, and other related materials. You can retrieve this material in UW Libraries Search by entering the keywords "Baltic music collection," which as of 2018 retrieves approximately 1,100 items. Then use the filters in the left-hand column (under "Refine My Results") to retrieve materials in one of the three languages (Estonian, Latvian, Lithuanian), in a particular genre, by a particular composer, or in one or more of several other categories.