GRFX is a powerful and creative granular effects processor that turns ordinary audio into extraordinary sonic landscapes. Slice your sound into grains and reshape them into evolving textures, shimmering chords, rhythmic glitches, haunting drones, and more.
At the heart of GRFX is the Harmonic Triangle – an intuitive 3-way pitch controller that lets you morph simple tones into lush pads, arpeggiated patterns, or abstract gestures. Whether you’re aiming for organic soundscapes or synchronized stutters, GRFX gives you precise control over the flow of grains and modulation.
Build complexity with four self-modulating LFOs, a multi-effect chain with probabilistic routing, and an elegant drag-and-drop modulation system. Shape your sound, modulate nearly every parameter, and sculpt immersive audio transformations in real time.
Key Features:
- Granular engine for creating textures, rhythms, chords, glitches, drones, ambiences, and more
- Harmonic Triangle for 3-way pitch control, detuning, and microtonality
- Built-in Chord Selector with 32 triads for instant harmonic richness
- Grain envelope shaping for plucky, smooth, or abrupt grains
- Buffer size, division, sync, and freeze controls
- Rhythmic synchronization for tempo-synced effects and patterns
- 4 LFOs with self-modulation and drag-and-drop assignment
- Modulation panel & view mode for streamlined modulation management
- 2 Multi-Effect slots (Filter, Distortion, Delay, Peak EQ, Chorus, Phaser, Bitcrusher, Reverb) with probability-based routing
- Dedicated Send FX with Delay and Reverb in series or parallel mode
- Flexible mixer section for sculpting wet/dry balance and routing
AUv3 Audio Unit plugin – requires an AUv3-compatible host app such as Logic Pro, GarageBand, AUM, or Cubasis. Standalone version included.
I’ve got most if this developer’s apps. Mostly because I like how they find creative ways of doing something that’s been done before, but in a unique way. That said, I already have several granular effects apps and thought I’d skip this one. Yet, I had to see this developer’s approach to granular fx, and decided I should beta tested this one.I’ve compared it to several other granular fx apps I have, and these guys have done it again! GRFX is a blast to play with and I find myself often blissfully lost in experimenting with various sources.Highly Recommended!
Developer Response
Thank you so much for your thoughtful and enthusiastic review! We're thrilled to hear that GRFX has earned a spot alongside your other granular effects apps, and even more so that it's inspiring such joyful experimentation. We put a lot of heart into crafting unique tools that spark creativity, so your words truly mean a lot to us. Thanks for supporting our work and for trusting us once again—have a blast exploring GRFX!
Doesn’t Work On iPhone 12
Eriptron
Update: No support response. More wasted money on an Apple app. No more. No sound. Control labels are too small and this is another developer that doesn’t know how to make ‘white’ labels, only using half the pixels so they’re dingy gray adding more difficulty reading them. No ‘in app’ documentation. No PDF manual. App doesn’t follow online documentation. Et cetera, et cetera, et cetera. Wasted $8. I haven’t bought an Apple app in a very long time for too many negative experiences during these Tim Cook years. I chance it here and get burned again. You folks forgot the sound. Dahh
Developer Response
Thank you for your review. Please bear in mind that GRFX is an effects app, so it doesn’t produce sound on its own. If you’re using the standalone version, the app starts muted to avoid feedback. To enable it, you’ll need to toggle the button in the top-right corner of the Mixer panel (this may be why you weren’t hearing any sound).Could you please clarify what you mean by “the app doesn’t follow the online documentation”? Did you find any information missing or unclear in the manual?The label colors were a design decision, but if you’d like to suggest improvements, feel free to reach out through our website. We’re always happy to listen and take note. Many features and fixes in our apps come directly from user feedback.Lastly, could you please check whether enabling the Mixer panel resolves the sound issue you were experiencing?Best regards
The best
psychoghost1
What can I say 🤷♂️ it’s good….just get it
Developer Response
Short, sweet, and straight to the point—we love it! 😄 Huge thanks for the support and for spreading the good vibes. Enjoy making magic with GRFX!
- General bug fixes and improvements
Version 1.0.4
The developer, Imaginando Lda, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
