Einklang is a synthesizer following a new paradigm of sound generation. Instead of synthesizing sounds like traditional synthesizers according to a set of technical parameters (i.e., amplitudes, frequencies, spectra…), this app re-synthesizes sounds using instrument models. These instrument models can not only be tweaked directly in their musical parameters (i.e., loudness, pitch, timbre…) but also be morphed from one tone color to another. These key features allow the user to think in plain sounds rather than mathematical equations and to control EINKLANG with only few musical parameters. The musician can concentrate on musical aspects, while the synthesizer does all of the underlying technical processing.