Riffer 4: MIDI Riff Generator by Audiomodern

Riffer 4 uses five separate generation engines rather than a single randomizer. Audiomodern describes each engine as having its own musical character. The engines can produce hypnotic sequences, memorable hooks, guitar-inspired patterns, animated arpeggios and basslines. Their output can be reshaped, combined and transformed into new ideas, which makes it possible to move from one engine's material to another within the same session.

Because each engine produces a different style of pattern, the choice of engine often matters more than randomizing repeatedly within one engine.

The workflow starts with a key and scale selection. From there, you generate a riff and then control its note range, density, timing and feel. Every note can be edited directly, so a generated pattern can be adjusted to fit a specific chord progression or arrangement.

For longer projects, variations can be created and developed from the same starting material. When the riff is finished, you export MIDI and continue in your favorite music-making environment, where the material can be assigned to any instrument you choose.