Roundels is a MIDI FX plugin designed to generate complex rhythmic and melodic patterns by combining multiple Euclidean rhythm generators. It creates hybrid rhythms that blend small-scale variations with larger repetitive structures, allowing for dynamic and evolving sequences. The plugin’s step sequencer can interpret note sequences as pitch rows or sets, enabling experimental music creation without relying on randomness. Users can assign the output of each rhythm generator to control step movement, trigger rhythms, or both, providing comprehensive control over the sequence flow.

This plugin offers extensive pitch sequencing capabilities, including transposition, inversion, retrograde, and interval manipulation, alongside standard playback modes such as forward, backward, and ping-pong. Roundels operates independently from a traditional DAW timeline, responding to MIDI note-on messages to function in various timing contexts. A unique morphing feature allows three user-created sequences to blend seamlessly, either manually or via automation, facilitating smooth transitions and complex layering. Additionally, the plugin supports hierarchical rhythmic subsets to organize Euclidean patterns effectively.

Roundels includes an array of features to enhance sequence customization, such as velocity sequencing with humanization, adjustable gate lengths, and swing functions. Its visual output viewer displays rhythmic and pitch timelines for detailed editing. The plugin supports parameter randomization, enabling users to generate new sequences or related sets quickly. It integrates tightly with host applications, allowing automation and preset saving, and runs efficiently on both Intel and Apple Silicon systems. Roundels is an innovative tool for producers seeking intricate rhythmic and melodic sequencing within their DAW environment.