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Cthulhu is a VST MIDI-FX plug-in designed for harmonic exploration and manipulation. It functions as both a chord memorizer/player and an advanced arpeggiator. The chord module allows users to create and rework chord progressions using single-note presses. It includes over 150 factory chord presets and supports MIDI import and real-time chord analysis with sorting options. The arpeggiator module features a pattern-based step sequencer that can reshape incoming MIDI notes into rhythmic riffs. Unique features include chord-arpeggio mode, ties, duration/velocity sequencing, intelligent transpose, and harmony controls. Each sequencer tab can operate at different lengths for polymetric arpeggios. It's compatible with Windows 7 SP1+ and macOS 10.11+ in VST, AudioUnit, or AAX formats.
Cthulhu is a VST MIDI-FX plug-in designed for harmonic exploration and manipulation.
Explore all tools that specialize in chord generation. This domain focus ensures Cthulhu delivers optimized results for this specific requirement.
Explore all tools that specialize in arpeggiation. This domain focus ensures Cthulhu delivers optimized results for this specific requirement.
Explore all tools that specialize in midi manipulation. This domain focus ensures Cthulhu delivers optimized results for this specific requirement.
Allows users to store and trigger complex chord voicings with single-note presses, streamlining harmonic experimentation and performance.
A step sequencer with per-step control over velocity, duration, and pitch, transforming incoming notes into intricate rhythmic patterns.
Combines chord memorization with arpeggiation, enabling complex harmonic and rhythmic interactions.
Each step sequencer tab can operate at its own length, creating evolving and complex rhythmic variations.
Allows users to import existing MIDI files and analyze the chord content for further manipulation and re-harmonization.
Automatically transposes arpeggiated notes based on user-defined scales and harmonic rules, preventing dissonant or out-of-key notes.
Download the Cthulhu installer for your operating system (Windows or macOS).
Run the installer and follow the on-screen instructions to install the VST/AU/AAX plugin.
Launch your DAW (Digital Audio Workstation) such as Ableton Live, Logic Pro, or Cubase.
Insert Cthulhu as a MIDI FX plugin on a MIDI track. (Logic users should use the MIDI FX version)
Route the MIDI output of the Cthulhu track to a virtual instrument track.
Load a chord preset or record your own chords into the chord memorizer.
Enable the arpeggiator and adjust the step sequencer parameters to create rhythmic patterns.
Experiment with different chord voicings, arpeggio patterns, and modulation options.
Refer to the online documentation for advanced features and troubleshooting.
All Set
Ready to go
Verified feedback from other users.
"Users praise Cthulhu for its intuitive workflow, powerful arpeggiation capabilities, and ability to inspire new musical ideas, but some find the interface slightly dated."
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