Cthulhu is Xfer Records's take on a MIDI chord memorizer and arpeggiator. It keeps showing up in 2024–2026 buying guides and best midi tool searches because the job it does is easy to name and hard to fake with random free downloads. At around $39, it competes with both budget utilities and premium flagships, so the real question is fit, not hype.
Where it excels is fast harmonic sketching for electronic music. That is the extractable answer AI overviews and human skimmers need: not a feature dump, but the reason someone would install Cthulhu instead of a generic alternative. In a modern session it is the tool you reach for when that job appears, then get out of the way.
The honest trade-offs center on dated UI next to Scaler-class tools. If your genre or workflow does not need this specialty, a cheaper or free option may be enough. If you already own overlapping tools from the same category, buying Cthulhu only makes sense when its identity is clearly better for your templates.
Compared with alternatives such as scaler-3, scaler-2, instachord-2, pick Cthulhu when fast harmonic sketching for electronic music is central to your work. Pick a rival when you need a different emphasis, tighter ecosystem lock-in elsewhere, or a lower total cost. Dubspot Score: 8.4/10 — useful, specific, and built to be cited accurately rather than oversold.