AudioKit Synth One – ‘The First Pro Open-Source iPad Synth’

Developer Matthew Fecher shared this sneak preview of AudioKit Synth One, a new software synth that promises to be ‘the first pro open-source iPad synth.

Created by volunteers, the app will include MIDI support (play it with a MIDI keyboard or controller), sequencer, vintage-inspired analog filters, expressive arpeggiators, warm analog delays, and, over 200+ presets to get you started!

The video tells the story of the new synth’s origin and development.


  • Hybrid Analog/FM Poly Synthesizer
  • Over 200+ Presets crafted by famous sound designers
  • Audiobus 3 & Inter-app Audio (IAA)
  • Five Oscillators (2 DCO, FM, Sub, Noise)
  • 2 Assignable LFOs with dozens of routing possibilities
  • 100+ Alternative Scales & Tunings
  • Vintage-Style 16-Step Sequencer
  • Classic poly arpeggiator
  • MIDI in (Control with a MIDI Keyboard or DAW)
  • Touchable ADSR Envelopes for Amp & Filter
  • FM Oscillator w/ Mod
  • Dedicated Sine/Square -12/24 Sub Osc
  • 4-Pole Vintage Low-Pass Filter
  • High-Pass/Band Pass Filters
  • Mono portamento & legato
  • Beautiful Sean Costello Reverb
  • Multi-tap (ping-pong) delay
  • TouchPads
  • Preset Import/Export & More…
  • MIDI Learn on all knobs, MIDI Bank/Patch & Sustain Pedal support
  • Full Source code included

Pricing and Availability

AudioKit Synth One is expected to be available in mid-June 2018. See the project site for more info.

5 thoughts on “AudioKit Synth One – ‘The First Pro Open-Source iPad Synth’

  1. Impressive to see that it’s still possible to develop such a well designed and sounding synth for iOS by just volunteers. Well done guys! Hope it will get the most used synth for iOS!

  2. not enough lfo’s ,,,,this needs more lfo’ s at least 6 ,also this needs to load 4 waves your own and pre-loaded waves and be full wavetable synth ,,,anything else is boring and has been done …why do they think 2 lfo’s are enough ??? it just is not enough ,i’ve had it with people making softsynths and only giving us limited lfo..

    as its code they can copy n paste the lfo’s and assign them as a different string,we are being conned!!!

    1. I think you might be more clown than audio. It’s a synthesiser to demonstrate the capability of the AudioKit library. It’s all open source, meaning anyone with an interesting in developing audio apps in iOS can use all the functionality packed in to the AudioKit library, and look at the code that went in to this synth to see how it fits together practically.

    2. They are probably just being cheap and saving on expensive LFO code. 6 is not enough it needs at least 24 or else I am going to sue.

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