AudioKit Synth One J6

Name: AudioKit Synth One J6
Rating: 4.9 (2408 reviews)
Author: AudioKit Pro

NEW! Pro Synthesizer + AUv3

Free · In‑App Purchases

2.4K Ratings
Age Rating

4+
Years
Category

Music
Developer

AudioKit Pro
Language

EN
English
Size

80
MB

J6 is Amazing & FREE! Have fun :) EVERYTHING INCLUDED, NO Ads or Subscriptions! SYNTH ONE J6 (Inspired by Juno-6 & Jupiter series*) Trusted by over 250,000 iPhone & iPad musicians, Synth One J6 is now on Mac too! Pro Quality. Actually Cool. And Yes, Totally Free. Synth One J6 delivers lush pads, deep basses, classic keys, and vibrant leads that feel truly alive. No ads. No subscriptions. No in-app purchases (unless you want to leave a tip). CREATED BY VOLUNTEERS Musicians, Educators, and Sound Designers over 4 years. Synth One J6 is used in Schools and Higher Education institutions across the world. Just pure, expressive sound designed for creators of every level. EASY TO USE The interface is intuitive and welcoming. Each function has a dedicated slider or knob. Simple for beginners and deep enough for pros. WHAT MAKES IT DIFFERENT? Major accessibility improvements and Voice Over have been added throughout the app to make Synth One J6 a much more enjoyable instrument for blind and visually impaired musicians. LEARN THE EXCITING STORY: audiokitpro.com/synthonej6 Inspired by legendary synths like the Juno, Jupiter, and DeepMind series. It's not a clone. It's a new classic: built from the ground up with a custom, non-vibe coded sound engine. You’ll hear the warmth, the punch, the vibe. INSTANT INSPIRATION With over 400+ presets, a classic step sequencer, dual arpeggiators, analog-style filters, tape delay, reverb, chorus, 3 LFOs, and real-time FX control, your creativity will never hit a wall. FEATURES: ∙ 400+ Presets and Features Included, ∙ Pro Version Included, Nothing to Buy! ∙ Microtonality and World Scales ∙ Accessibility and Voice over for the Blind and Hearing Impaired ∙ Lush, Expressive Vintage Synthesizer Sound ∙ FX: Glorious Reverb, Analog Tape Delay, Chorus, Crush, and more. ∙ 3 LFOs, over 60+ possible destinations, almost everything can be modulated! LFOs can even modify other LFOs ∙ Control it with a MIDI Keyboard, MIDI Learn to map your controls to the app ∙ Classic Arpeggiator & Vintage-style Step Sequencer, with extra features ∙ Dual Assignable Touch Pads, manipulate FX in real time! ∙ Preset Sync between iPhone, iPad & Mac! Create a sound on one device and continue working with it on another. ∙ Created by volunteers to support music education and access for all PLUGIN ON iOS and MAC: ∙ iOS: Works as a Plug-in Instrument in GarageBand and Logic for iPad, AUM, Cubasis, and MORE! ∙ Mac: Tested in Ableton, GarageBand, Logic, and more! WORKS BY ITSELF ∙ “RECORD” button: Easily record your synth and sound fx, then export wav fileNo other apps needed! PERFECT FOR CLASSROOMS AND... STUDIOS Synth One J6 was built for musicians of all levels, with an interface that is intuitive for beginners and deep enough for pros. Especially great for schools and students who may not have access to paid apps. BUILT BY MUSICIANS, SHARED WITH THE WORLD MADE FOR MUSIC. MADE FOR EVERYONE. Music should be for everyone. That is why Synth One J6 is truly free. No fees. Please help us share it. Tell a teacher. Tell a student. Tell anyone who’s dreamed of experiencing a vintage synthesizer but lacked the opportunity. Because music belongs to everyone. * LEGAL NOTICES This app has no affiliation or endorsement from Roland Corporation. It is not a clone of the Juno-6, Juno-60, Juno-106, Jupiter-8, or any other synthesizer. While we were inspired by the sound and legacy of these iconic instruments, this is an original creation, built from the ground up. All product names, trademarks, and images mentioned are the property of their respective owners and are used only to describe the inspiration behind this app and for purposes of reference. Their inclusion does not imply any association, affiliation, or endorsement. This project is free and was created solely to promote music creation and education. We sincerely respect the incredible work of Roland and other manufacturers in shaping music history.

Ratings & Reviews

4.9

out of 5

2.4K Ratings

Best software synth I ever played
Apr 30
Aladdin Wannabe
Thanks so much for making this free. This is the best app you ever made. I was surprised with how much detail this includes. For a while, I stopped using software synths and tried to create my own hardware synth sounds in the korg minilogue. I love that I can plug my guitar into it to get the filter, lfo and delay effects. I wish I had a AudioKitSynth One J6 HARDWARE synth that I can plug my guitar into to use the effects as well. It would probably be so expensive though. Even though this is software, all the textures and many layers of this synth gives strong illusions of that hardware feel.Well done on this masterpiece app.My only request is if you can add a feature while changing the tuning from 440. Please allow 2 decimal values. I used to play 432 tuning because it’s like a rounded off earth frequency, but I now play a tuning that’s tuned exactly to earth and it gives a calming sensation. And if you add this feature, please also allow typing in the value. Other apps that allow tuning with 2 decimal numbers mostly only has a knob to adjust the tuning that doesn’t allow the exact value I need. I can use another app to pitch it close to where I need it, but that creates lag when I play.
Best software synth I ever played
Apr 30
Aladdin Wannabe

Thanks so much for making this free. This is the best app you ever made. I was surprised with how much detail this includes. For a while, I stopped using software synths and tried to create my own hardware synth sounds in the korg minilogue. I love that I can plug my guitar into it to get the filter, lfo and delay effects. I wish I had a AudioKitSynth One J6 HARDWARE synth that I can plug my guitar into to use the effects as well. It would probably be so expensive though. Even though this is software, all the textures and many layers of this synth gives strong illusions of that hardware feel.Well done on this masterpiece app.My only request is if you can add a feature while changing the tuning from 440. Please allow 2 decimal values. I used to play 432 tuning because it’s like a rounded off earth frequency, but I now play a tuning that’s tuned exactly to earth and it gives a calming sensation. And if you add this feature, please also allow typing in the value. Other apps that allow tuning with 2 decimal numbers mostly only has a knob to adjust the tuning that doesn’t allow the exact value I need. I can use another app to pitch it close to where I need it, but that creates lag when I play.
Truly, Truly Unbelievable!
May 6
Music for the living
Its very rare that i write a review these days with the zeitgeist seemingly bombarding us with discontent at every turn, but — this synth motivates me. I cannot believe that this is free! In my personal opinion, this provides a warmer, fuller version of the real analog synth sound than any other i’ve heard yet and i’ve been buying ios synthesizers for about 15 years. Beautiful effects contribute to the sound for sure but remove all the effects and it still sounds smooth, lush and warm. I am primarily a guitar player and this synth truly feels like the tone of a singing yet biting tube amp. The kind people pay big money for. Sometimes a developer, due to who knows what factors, comes up with something exceptional beyond words and this synth in my opinion is one of those instances. I don’t know how much better software synth can sound because this really does sound like the intended original. Well done Audiokit! And better than well done for making this piece of technical art free. That, in our age of selfishness is almost as great a thing as the sound itself. Thank you devs.
Truly, Truly Unbelievable!
May 6
Music for the living

Its very rare that i write a review these days with the zeitgeist seemingly bombarding us with discontent at every turn, but — this synth motivates me. I cannot believe that this is free! In my personal opinion, this provides a warmer, fuller version of the real analog synth sound than any other i’ve heard yet and i’ve been buying ios synthesizers for about 15 years. Beautiful effects contribute to the sound for sure but remove all the effects and it still sounds smooth, lush and warm. I am primarily a guitar player and this synth truly feels like the tone of a singing yet biting tube amp. The kind people pay big money for. Sometimes a developer, due to who knows what factors, comes up with something exceptional beyond words and this synth in my opinion is one of those instances. I don’t know how much better software synth can sound because this really does sound like the intended original. Well done Audiokit! And better than well done for making this piece of technical art free. That, in our age of selfishness is almost as great a thing as the sound itself. Thank you devs.
Unfair
Jun 21
MacBezzy
It’s always the great ones that know how to function in society properly. What am I speaking about? Principles, character, good folk. The fact this is free is criminal. Do what they ask and leave a honest review. It’s crazy, cause I know that’s what they want. They don’t want you to say you like it if you don’t. What they do want is a balanced critique. So if you do not like it say why. Anyway the sound quality is bonkers. And not just like for an app. No the sound quality is ridiculous. Hook up a decent midi to this and it’s your fault if you can’t get something properly done. Ok that’s it. I only poke my head out of my cave to leave these kind of things when I’m emotionally moved. I didn’t even mention the free stuff in addition to. Seriously you (synth one) should ask for something. Seriously.
Unfair
Jun 21
MacBezzy

It’s always the great ones that know how to function in society properly. What am I speaking about? Principles, character, good folk. The fact this is free is criminal. Do what they ask and leave a honest review. It’s crazy, cause I know that’s what they want. They don’t want you to say you like it if you don’t. What they do want is a balanced critique. So if you do not like it say why. Anyway the sound quality is bonkers. And not just like for an app. No the sound quality is ridiculous. Hook up a decent midi to this and it’s your fault if you can’t get something properly done. Ok that’s it. I only poke my head out of my cave to leave these kind of things when I’m emotionally moved. I didn’t even mention the free stuff in addition to. Seriously you (synth one) should ask for something. Seriously.
This app Is so close to perfect, but…
11/07/2025
Aaaaaalalalaaalaalalala
I think that, if an app were to have full support with their previous versions, it would have to have all the previous effects present from those versions. What I’m trying to say is that there are 2 things missing from this version and the synth one; FM synthesys, and distortion. For the first one, all you would need to do is be able to rewire an oscilator to modulate like an lfo in a small drop-down menu. (Or independent fm knobs would be nice too). For the second one, any classic 80’s distortion would work wonderously (saturation would be nice to thicken sounds). Also (last thing), I know that these are all likely unsupported with the original J6, but they would help to move people over from synth one into the new app. I know it takes a lot to add features like this, but it would go a long, long way in improving this app, and user’s experience with them.
This app Is so close to perfect, but…
11/07/2025
Aaaaaalalalaaalaalalala

I think that, if an app were to have full support with their previous versions, it would have to have all the previous effects present from those versions. What I’m trying to say is that there are 2 things missing from this version and the synth one; FM synthesys, and distortion. For the first one, all you would need to do is be able to rewire an oscilator to modulate like an lfo in a small drop-down menu. (Or independent fm knobs would be nice too). For the second one, any classic 80’s distortion would work wonderously (saturation would be nice to thicken sounds). Also (last thing), I know that these are all likely unsupported with the original J6, but they would help to move people over from synth one into the new app. I know it takes a lot to add features like this, but it would go a long, long way in improving this app, and user’s experience with them.

Quick fixes for Koala, and more! Includes everything from last MASSIVE UPDATE! APPROACHING VERSION 1.0 This is one of our biggest updates yet. After a year of work, SYNTH ONE J6 is expanding to Mac, adding major accessibility and microtonality features, new Chorus, preset syncing, and a whole lot more. • NEW NATIVE MAC VERSION! SYNTH ONE J6 is now available on Mac, with native support for both Apple Silicon AND Intel Macs, plus AUv3. The app has been tested in Mac on Ableton, GarageBand, and Logic so far. This is our first Mac app, so please be patient with us as we work through any early issues. If you find a bug, we'd genuinely love to hear about it: matthew@audiokitpro.com • ACCESSIBILITY! Major accessibility improvements have been added throughout the app to make SYNTH ONE J6 a much more enjoyable instrument for blind and visually impaired musicians. This is an area we care deeply about, and we'll continue improving it. • MICROTONALITY! SYNTH ONE J6 now has full microtonal support • Import Scala tuning files • Explore World Scales with keylock • Western scales (ie Ab Minor, G# Blues) • Create music far beyond standard 12 tone tuning • Use alternate tunings across iPhone, iPad, and Mac • PRESET SYNC! Your presets can now automatically sync between iPhone, iPad, and Mac. Create a sound on one device and continue working with it on another. Turn on Preset Sync in the Settings panel by tapping the [i] button. NEW SYNTH FEATURES! • PWM: Pulse waveform added as a new oscillator choice • Pulse Width is now a modulation destination for LFO 2 and LFO 3 • NEW Noise Oscillator NEW V2 FILTER inspired by the character of the J106 Tap the Filter header to switch filter types NEW J60 CHORUS! A new lush and beautiful chorus option has been added. Tap the Chorus header to switch between chorus types. HIGHER QUALITY OSCILLATORS! • 2x oversampled oscillators on iPhone and iPad • 4x oversampled oscillators on Mac NEW iPAD + MAC NAVIGATION A new middle navigation menu makes it much faster to jump between bottom panels on larger screens. Prefer the original layout? You can turn the new navigation menu off in Options. PLUS Musical Typing Keyboard added in standalone for iOS & Mac, CMD + K to show it. Play with your QWERTY keyboard iPHONE + iPAD IMPROVEMENTS • Automation now records correctly in GarageBand and similar AUv3 hosts • Fixed stuck notes that could occur when changing waveforms while MIDI notes were playing • Ableton Link upgraded to the latest version Additional fixes, polish, and improvements throughout We're getting very close to 1.0. Thank you for making music with SYNTH ONE J6 and helping us make it better.

Version 0.999.4 2h ago

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Accessibility

Information

Seller: AudioKit Pro, LLC
Size: 80 MB
Category: Music
Compatibility: Requires iOS 15.0 or later.

iPhone
Requires iOS 15.0 or later.

iPad
Requires iPadOS 15.0 or later.

iPod touch
Requires iOS 15.0 or later.

Mac
Requires macOS 12.0 or later.

Apple Vision
Requires visionOS 1.0 or later.
Languages: English
Age Rating: 4+

4+

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