In 1832 he founded a Liedertafel (a peculiarly German type of male singing society) in Riga (now in Latvia) with Heinrich Dorn.
Weitzmann toured in Lappland and Finland (then part of the Russian empire) and performed with orchestras in Paris and London, returning to Berlin in 1848 to research music history and theory.
[2] This has led to a strong conceptual association between Weitzmann's work and the Zukunftsmusik ("Music of the Future") for which he attempted to account.
His most lasting contribution to music theory (researched by contemporary American theorist Richard Cohn) concerns chord relations.
Weitzmann suggested a-minor and e-minor triads were more closely related to C-major because they shared two common notes.