Modular synths can be used to make jazz music by creating unique and complex soundscapes that can be used as the foundation for improvisation. Synthesizers have been used in jazz music since the 1970s. Early adopters of the technology included jazz fusion bands such as Return to Forever and Weather Report and jazz keyboardists like Herbie Hancock and Chick Corea. These musicians used synthesizers to expand jazz's sonic palette and incorporate funk, rock, and other popular music styles into their sound. Over time, more and more jazz musicians began to incorporate synthesizers into their performances and recordings, and technology became increasingly common in the genre. Today, synthesizers are a staple in contemporary jazz music, and many jazz musicians continue to experiment with the instrument to push the boundaries of the genre. 

Some jazz artists who use modular synths include Herbie Hancock, Sébastien Léger, and Dick Hyman.

Specific sounds that can be made with Eurorack that work well with jazz include:
* Complex chord structures: Many Eurorack modules can create complex chord structures that can be used as the foundation for improvisation.
* Synth bass: Eurorack modules can create deep, warm bass sounds that can be used as the foundation for jazz compositions.
* Percussion: Eurorack modules can create a wide range of percussive sounds that can be used to add texture and rhythm to jazz compositions.
* Modulation: Eurorack modules can create a wide range of modulation effects that can be used to add movement and interest to jazz compositions.