Kirnu Buttersynth For iPad Features Wavetable, FM, Sample & Granular Synth Engines

Kirnu Interactive has introduced ButterSynth for iPad, a hybrid 6-oscillator wavetable/FM/sample-based AUV3 and standalone synthesizer that covers a vast sonic range.

ButterSynth lets you mix any combination of wavetable, FM, sample and granular synthesis engines. Other highlights include a deep modulation matrix, FX rack, factory waveform and sample libraries and more.

  • Mix and match any combination of 6 synthesis engines.
  • Dual-wavetable engines feature 9 phase modes, wave folding, and deep unison controls, modeled on vintage hardware synths.
  • Built-in wavetable editor gives you the ability to tweak, morph, and hand-draw your own custom wavetables, with each wavetable supporting up to 256 frames.
  • FM engine offers 4 operators with a selection of 12 modulation paths. Each operator can be loaded with any waveform from the factory or user library, and can also self-modulate via the feedback dial.
  • Sample and Granulator engines both let you load samples (either imported or from the factory library) and control precisely how they are chopped, triggered and layered. Both also feature the same powerful unison modes available in the WT engine.
  • Highly configurable 32-slot modulation matrix featuring precise mix/max ranges, self-modulation (via the amount target), plus configurable response curves and layer modes. Simply long-tap any parameter to set it as a Mod destination.
  • Full suite of versatile control sources which includes: 4x MSEG-style looping curve envelopes, 4x LFOs, 4x step sequencers, X/Y pad with motion recording, 8x Macro dials and a powerful arpeggiator inspired by Kirnu Interactive’s Cream.
  • The EFX rack lets you build your own insert effects chain using any combination of the 16 built-in FX modules. Modules available at launch include delay, reverb, distortion, chorus, OTT compression etc. Note – FX parameters can also be targeted by the mod matrix, unlocking the possibility to program ‘per voice’ modulated effects.
  • All presets, wavetables, samples and other settings are stored in the Files app, making bulk import/export, backup and community sharing quick and easy.

Pricing and Availability:

ButterSynth is available now for $19.99 USD.

13 thoughts on “Kirnu Buttersynth For iPad Features Wavetable, FM, Sample & Granular Synth Engines

    1. I imagine it requires additional effort to test and support an iPad app running on macOS, but I really wish every developer would do so – it’s so beneficial to be able to run the same synth on iPad and Mac.

  1. An iOS synth to rival the best VST’s…with synths like this, moog, suger bytes, arturia, fabfilter on the iOS platform no one can argue that an iOS device cant ‘sound’ as good as a full desktop system whatever you may feel about the form factor…

      1. Digital synths sound the same on any computer, my M1 iPAD Pro has USB3 to my RME Babayface, it sounds the same as my main DAW through my main RME Converters. Its the same whatever you may think. I have TWIN3 on main DAW and iPAD, it’s identical. I have a few iOS apps (Borderlands for example) sound better than any of the 1000s of VSTs I own, as long as you hand a good DA of the iPADs USB its as good as most digital hardware synths as well.

        1. Sean is correct: running the same synth app or plugin on M2 iPad vs. M2 MacBook Pro is going to sound pretty similar.

          Personally I really like having the Korg plugins as well as Gadget on both iPad and Mac.

          Sunrizer has been one of my go-to synths on iOS and I also use the AU on macOS.

          I wish Propellerheads/Reason Studios hadn’t killed ReBirth, but I still use it on iOS.

    1. lololol. the sound quality of iOS devices hasn’t been a matter of doubt for over a decade honestly. it’s the wacky hardware and app setting and OS decisions by apple that have made this an unserious environment. Leslie’s right.

      1. You seem to be missing the point – the sound quality comes from the interface you plug in the USB 3 port, in my case RME…the rest is just digital and the same as any platform. It’s a far more serious environment than any other portable studio/synth and a great sound module for any studio.

        Ps many iOS apps run natively now on MACs, they also sound exactly the same!

  2. This is a really good synth, complex, but many options way beyond what you find in most plug-ins.
    However I wasn’t too impressed by the presets, many overly harsh EDM sounds.

  3. Its getting a little harder to differentiate between synths, because every one of them comes with Everything now. Once they started offering user sample import, it kind of broke through the last barrier. If you really work that feature, it can let you off the leash big-time. Phantom of the Space Opera, dude.

  4. I really like seeing synths that implement this kind of mod matrix with lots of slots, depth mods, and curves, etc. I wonder how fast the mod scan rates are.

    Does it let you load a whole keymap of samples (like a soundfont?) or just one sample?

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