8.4Great
Cthulhu is a MIDI chord memorizer and arpeggiator from Xfer Records. Score 8.4/10, price $39, formats and comparisons.
Plugin comparison
Cthulhu vs W.A. Production InstaComposer 4
Specs, price and the Dubspot Score, side by side — with our verdict on which midi tool to buy.
Independent score / workflow fit / buying signal
Contenders
The side-by-side
InstaComposer 4 is W.A. Production's MIDI generation plugin, with a rebuilt MIDI Engine 2.0, Groove and Foliage controls, SoundFont loading and a built-in mixer. Intro $29.90, list $129.
Technical matrix
Specs compared
| Signal | Cthulhu | W.A. Production InstaComposer 4 |
|---|---|---|
| Price | $39 | $29.90 (intro) |
| Dubspot Score | 8.4 | — |
| Formats | VST3, AU, AAX | VST3, AU, AAX, macOS, Windows |
| Product type | MIDI chord memorizer and arpeggiator | — |
| Developer | Xfer Records | — |
| Typical price | $39 | — |
| Formats | VST3, AU, AAX | VST3, AU, AAX on macOS; VST, AAX on Windows |
| Primary job | fast harmonic sketching for electronic music | — |
| Catalog status | Current as of 2026 | — |
| Type | — | MIDI generation plugin and songwriting tool |
| Tracks | — | Up to 6, each routable to its own MIDI channel |
| Scenes | — | Up to 8 per song section |
| Generation modes | — | Melody, chords, Arpeggiator, Rhythm V2, full song |
| Sound | — | Built-in acoustic piano, General MIDI instruments, SoundFont (SF2) loading, mixer with reverb and delay |
| MIDI | — | Import, export, drag and drop, multi-track and multi-channel routing |
| Scales | — | Major, Minor, Harmonic, Pentatonic, Spanish, Arabic and more |
| System | — | macOS 10.13 or later, Windows 8 or later |
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