The article states that Georg Joseph Vogler's theoretical approaches were further developed by later theorists, including Simon Sechter. Vogler had advanced empirical and often innovative theories of harmony, influenced partly by Vallotti and seen in his works such as Tonwissenschaft und Tonsetzkunst. These ideas, despite criticism in his lifetime, contained elements that shaped the progress of musical science.
Simon Sechter, an Austrian theorist active in the mid‑19th century, continued the theoretical lineage connected to Vogler by developing aspects of these earlier harmonic ideas. Although Sechter primarily grounded his work in the theories of Jean‑Philippe Rameau, the article explicitly identifies him as one of the theorists who expanded upon Vogler’s theoretical approaches, integrating them into his own influential three‑volume treatise Die Grundsätze der musikalischen Komposition, published in Leipzig in 1853–1854.
