Cthulhu is a comprehensive MIDI effect plugin that combines two powerful modules into one seamless tool. The first module serves as a chord memorizer and player, enabling musicians to craft and explore chord progressions effortlessly by pressing single notes. With over 150 built-in chord presets, users can access a vast range of musical chords, enhancing creativity and workflow. The plugin also supports importing MIDI chords or recording directly, with intelligent chord analysis and sorting options like Circle of 5ths, Chromatic, and root note sorting to organize chords efficiently.

The second module is a distinctive pattern-based arpeggiator that transforms incoming notes or chords into dynamic rhythmic sequences. Featuring an 8-tab step sequencer, Cthulhu allows detailed manipulation of MIDI inputs, turning even a single note into intricate arpeggiated riffs. This arpeggiator stands out with advanced capabilities such as chord-arpeggio mode, ties, velocity and duration sequencing, intelligent transposition, and harmony generation. Each sequencer tab can run independently with customizable lengths, enabling complex polymetric patterns that evolve over time and suit a wide range of musical styles.

Designed to inspire both beginners and experienced producers, Cthulhu offers a unique combination of chord generation and arpeggiation in a single plugin. Its intuitive interface and deep functionality make it an ideal tool for creating fresh chord progressions and intricate melodic patterns quickly. Whether used to spark new ideas or enhance existing compositions, Cthulhu provides a creative edge by transforming simple MIDI input into rich harmonic and rhythmic textures, making it a valuable addition to any music production setup.