“A big step forward for mobile music” - CDM (Create Digital Music)
"Groundbreaking iOS synth app" - Cult of Mac
"Must-download for every iPad owner" - MacBreak
*** "2018 App of the Year, Runner up" – Stuff.tv ***
*** “Best iOS Music Apps of 2018” – Cult of Mac ***
*** “Best of 2018: iOS Apps for Musicians” – Ask.Audio ***
"AudioKit Synth One is a free feature-packed synth for your iPad, including 300+ presets created by professional sound designers behind M83, Tycho, and Rihanna" - Engadget
*** “Best Music Apps of 2018” – Music Radar ***
LEARN OUR INCREDIBLE STORY:
*** Optimized for newer iPads & iPhones for best performance.
Note: Requires iPhone 6 or higher screen size. App will not work on older iPhone 5/SE/Touch devices
"A Stunning Endeavor... Sounds Amazing!"
- Francis Preve, Electronic Musician Magazine
“Amazing & Brilliant… Sounds fantastic!”
– The Sound Test Room
"A great example of human endeavor"
- Gaz Williams, Sonic State
"Sounds amazing... the start of something huge."
AudioKit Synth One is the first completely free & open-source professional iOS Synthesizer app in history. No Ads. No IAP. It will always be free.
"Powerful... Awesome" - Synthtopia.com
"An amazing synth app for your iPad that’s as close to sorcery as it gets" - GarageBand Guide
"Must Have iOS Synthesizer" - Synth Anatomy
"Synth One is a robust piece of free software" - The Verge
"It WOWS you... immediately fun to start tweaking!" - discchord
"A damn fine synth" - Computer Music Magazine
"Open-source and seriously powerful" - Future Music Magazine
"A labour of love that everyone can enjoy" - Music Radar
"Extremely exciting passion project" - Music Tech Magazine
"Make your own imposing synthesizer sounds and teach yourself the basics of music production" - Lifehacker
Created by over 100+ volunteers around the world (including sound designers for M83, Rihanna, Kanye West, Neon Trees, Mike Posner, Tycho, and more), this app includes MIDI support (play it with a MIDI keyboard or controller), sequencer, vintage-inspired analog filters, expressive arpeggiators, warm analog delays, and, over 300+ presets to get you started!
Email us your music & bugs: firstname.lastname@example.org
SYNTH ONE FEATURES:
This synthesizer is completely free, fully functional, and ad-free. There are no IAP or anything to buy -- It’s the ultimate free iPad music instrument app!
• Hybrid Analog/FM Poly Synthesizer
• Over 300+ Presets crafted by famous sound designers
• Audiobus 3 & Inter-app Audio (IAA)
• Ableton Link
• Five Oscillators (2 DCO, FM, Sub, Noise)
• 2 LFOs with over a dozen routing possibilities
• Vintage-Style 16-Step Sequencer
• Classic poly arpeggiator
• MIDI in (Control with a MIDI Keyboard or AudioBus/IAA)
• Touchable ADSR Envelopes for Amp & Filter
• FM Oscillator w/ Mod
• Mono glide and legato
• Dedicated Sine/Square -12/24 Sub Osc
• 4-Pole Vintage Low-Pass Filter
• High-Pass/Band Pass Filters
• Beautiful Costello Reverb
• Multi-tap (ping-pong) delay
• Preset & Bank Import/Export & More…
BONUS: Full Source code is now available!
Plus, it’s completely open-source. Use the code to learn how to build your own synth app or modify the app yourself!
OFFICIAL VIDEO: https://youtu.be/hwDNgCYowYs
"Amazing noises that will make your ears squee with glee" - Stuff Magazine
"Pick of the Week" - MacBreak
On the roadmap:
• MPE Support (Play w/ a Roli Seaboard)
• AUv3 Plug-in support
HEY EVERYONE! Thanks for being super awesome!
+ Do you have to pound your midi keyboard to get a note to play loudly? Do you barely press a key and have it play too loud? Well now you can adjust S1's sensitivity to MIDI Velocity in the Settings pop-over. Enable “Velocity-sensitive MIDI” and adjust the sensitivity knob to make your performance as expressive as possible for your keyboard. Also great with ROLI keyboards.
+ Fixed a bug that broke reordering your presets
+ Fixed a bug that hid the text of the name when saving presets.
+ Playing the Arp in down mode now plays keys in the order pressed (thanks to Francis Preve for this idea)
+ We are all volunteer musicians & coders. Thanks for your help!
+ Special thanks to volunteer coder Marcus Hobbs who added most of these features!
Synth one is getting better every day! That's the power of open-source.
Please note that we all are volunteers. AudioKit does not have any sponsors or investors.
We are all musician/developers who love making apps.
Together we can change the world.
We love hearing your music! Send it to us. For friendly conversation or to say hello, please email
The full & complete source code is available:
Ratings and ReviewsSee All
AudioKit Synth One is a wonderful example of how iPhone and iPad can change the way music is made. This feature-packed synthesizer encourages play and exploration, providing plenty of fully customizable sounds to please even the most cultured of music producers. Built by musicians for musicians, AudioKit Synth One is a must-have.
This synth sounds amazing, looks amazing, has more features than you would expect, and it’s free!! This quickly became a favorite synth of mine; I’m more pleased with it than apps I’ve paid $20+ for. I’m running it on an Air 1 and haven’t run into any performance problems with this.
Some features I really dig are the oscilloscope, the tuning controls, and the effects. It’s cool being able to see your sounds in real-time and not many synths—hardware or software—have that feature. The tuning page is really inspiring because you can get some nice variations while using the sequencer. And the effects sound absolutely beautiful. I also enjoy the ability to scroll through the different pages while playing the onscreen keyboard.
That’s not where the awesomeness of this app ends though. I cannot speak highly enough of what Matt and the rest of the team have pulled off here. To me, the greatness of a synthesizer is judged by how immersive the playing experience is, and Synth One delivers. You can quickly get lost in playing this because it is just that good. If you have an iPad, you need this app.
I have to say, I have owned many hardware synths from Kronos to M1 to Motifs,Kurzweil. Ensoniqs(showing my age with that one lol). I open your app and am completely blown away with the level of depth and movement in some of your patches and tweak able options. I also on your paid app ,just another level together. Never thought years ago I could this quality of sound on an iPad or iPhone that sits in my lap. You guys truly love you work. I have never written a review but after reading your updates notes and listening, using your latest version...all I can say is AWESOME. Your other apps...what can I say, Just as good ...my only complaint is a persistent battery drain on my 2018 iPad Pro that would run in the background ...even if you had global background turned off. Had to go on global and specifically go into the background setting of fm player and turn it off. Trust nothing major. Have a DX on a tablet is; awesome. Can’t wait for full AU3 integration. Again keep it going and keep inspiring us to create music !
- AudioKit Pro, LLC
- 72.8 MB
Requires iOS 10.3 or later. Compatible with iPhone, iPad, and iPod touch.
English, French, Japanese, Portuguese, Simplified Chinese, Traditional Chinese, Turkish
- Age Rating
- © Built with AudioKit
With Family Sharing set up, up to six family members can use this app.