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Based on classic synths from the 80s, it can make warm pads, pumping basses and smooth leads.
Perfect for any genre.

K-One Features:

Over 75 bespoke presets, made in consultation with some of the top music producers in the UK.

30 parameters for complete creative control. All mappable when used as an Auv3 audio unit.

K-One is based around four oscillators - a pulse wave, morphing sine-sawtooth wave, square sub and a noise oscillator.

A smooth, Moog-style resonant low pass filter, which can be modulated with its own envelope as well as via LFO.

5 different effects, including overdrive, delay, reverb and two custom made choruses, which give a deep, richness to the sound.

A non-resonant highpass filter.

Two ADSR envelopes for modulating the amp and filter.

Capable of an uncapped amount of polyphonic voices, or switch to the fat mono mode for basses and leads.

Pitch bend control.

A 127 note on-screen keyboard.

Compatible with Audiobus, Inter-App Audio, AUv3 and external midi control.

What’s New

Version 1.2

Thanks for all the comments and suggestions!
Made a few changes in this update -

Changed the reverb algorithm
Added a volume meter within the audio unit
Smoothed out changes in delay time
Boosted output level

Ratings and Reviews

3.0 out of 5
4 Ratings

4 Ratings

iavrou ,

Not quite finished yet

Some sounds are good but definitely not warm or classic, or particularly even modern. Think more Logic’s old synths from the old versions. Doesn’t seem to have a menu for changing patches, I have to use the list that’s passed to Cubasis but then the keyboard goes away - looks untidy and makes for a frustrating experience - changing a patch!

Not sure if I would buy it again.

AaronWard1979 ,


AUV3 doesn’t work since iOS 14.

RebeccaG54 ,

Tasty sounds!

I’m loving this synth. A really lovely sound, reminds me of the Roland Juno, especially the chorus fx. The interface is great as well, clean and simple. Made a whole acid/house track with just this synth, drums, basses pads and leads by running multiple AuV3 instances in AUM, really cool! My only comment would be that the factory presets could be more even in volume!

App Privacy

The developer, Colin Hallett, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

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  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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