Hermann Abendroth
In addition, Mengelberg employed fluctuations of tempo that were extreme even in an era in which tempo fluctuation was more common than in modern practice. While admirers of Mengelberg value his tempo inflections, detractors have criticized them. For example, the musicologist and music theorist Walter Frisch has argued that "in the Brahms performances recorded by Willem Mengelberg, tempo fluctuation too often tends to obscure the broader shape of a passage or movement." Frisch argues that this obscuring of structure does not result from the tempo fluctuations of two conductors he admires who also used much tempo inflection, Wilhelm Furtwängler and Hermann Abendroth.