Jazz Improviser

Jazz Improviser helps musicians, students, and composers discover new melodic ideas over chord progressions.

Choose from 73 built-in jazz presets — blues, rhythm changes, turnarounds, standards, and more — or write your own chords. Let the app generate random harmony, or keep a fixed progression while you explore new melodies.

Shape the music visually The piano roll shows your melody over time. Draw a blue pitch contour to guide register and direction, and an orange rhythm contour to control note lengths and density. Add motifs for recurring melodic shapes, then regenerate until something clicks.

Built for improvisation practice

Generate fresh melodic ideas in seconds
Hear results immediately with piano or string accompaniment
Adjust key, form, tempo, swing, and melodic character
Use song forms such as 12-bar blues, AABA, and ABAC
Fine-tune generation in Settings: temperature, chromaticism, ii–V–I emphasis, comp style, and more
Export your work Save MIDI or MusicXML and continue in your DAW or notation software.

Who is it for?

Jazz and blues musicians looking for practice material
Students learning improvisation over changes
Composers sketching themes and phrases
Teachers demonstrating melodic options over standard progressions
A creative tool, not a replacement for your ear Generated melodies are starting points for practice and composition. The final musical choices are yours.

Harmony and melody models are informed by jazz research datasets, including the Weimar Jazz Database. Generated output is new material, not copied from source recordings.