He has been instrumental in reviving rediscovered music, such as Telemann's 12 Fantasias for Viola da Gamba and works by Carl Friedrich Abel, playing them in concerts and first recordings, and publishing them by Edition Güntersberg.

[1] He toured in Europe, and beyond to New York City, Boston, Tokyo, Seoul, Abu Dhabi, Dubai, Havanna, Hong Kong, Shanghai and Jerusalem.

[2] The city of Köthen named him a cultural ambassador in 2014 for his international engagement for the music of Johann Sebastian Bach who had worked in the town, and of Carl Friedrich Abel who was born there.

[3][4] Fritzsch was instrumental in the rediscovery of lost compositions, such as Abel's 2nd Pembroke Collection, his Viol Concerto in A major and Ledenburg-Sonaten, sonatas by Johann Christian Bach,[3] and Telemann's 12 Fantasias for Viola da Gamba.

[1] In 2023, Fritzsch initiated and directed an international festival around Abel's music in the composer's home town Köthen, in memory of the tercentenary of his birth.