iPad Screenshots


Epic 64-voice Virtual Analog / PCM iPad Synth
Inspired by the Digital Synths of the 80s and 90s

100% of proceeds from this app go to support the AudioKit open-source project & AudioKit Synth One.

*** TOP 3 iOS MUSIC APPS OF 2018 *** - Music Radar Awards
(Computer Music & Future Music Magazine)

** Featured By Apple in "New Apps We Love!" **
"A Perfect Synth" - App Advice, Apps of the Week
"Fans of the D-50, JD-990, 01/W, Wavestation... Rejoice!" - Music Radar

FULLY LOADED w/ 500+ presets by Brice Beasley, Matthew Fecher, Red Sky Lullaby, Jakob Haq, Dean Daughters (Electronisounds), Sound of Izrael, Brian Funk, and more

"D1 Sounds awesome... Get this app!"
- Sonic State, Featured D1 on Podcast & Live Video Stream

• 64-voice Hybrid Digital Poly Synthesis.
• Full 1+ Gigabyte of original samples recorded from analog & fm synths over 30+ years old
• AUv3 Plugin & Stand-alone iPad Synth
• Space-saving Compression - The whole app is under 200mb!
• Dual layers per voice. Keyboard splits. Velocity Scaling.
• Vintage-style Arp/Step Sequencer that can be routed to specific layers.
• 3 LFOs. Fun Routings. LFOs can modify other LFOs.
• Dual Independent per-Layer filters
• Plus, per-voice Harmonic key-tracked Envelope filters.

"Digital D1 Sounds and plays AMAZING!" - The Sound Test Room
"Rad retro synth sounds" - Cult of Mac, App of the Week
"AudioKit Digital D1 is a beautiful Synthesizer app that recreates the spirit of legendary synths" - Synth Anatomy

• FX: Glorious Reverb, Phaser, Digital Delay, Distortion, Flanger, Chorus, Crush, and more.
• Perfect with a MIDI Keyboard
• Ableton Link
• All kinds of awesome stuff
• The Sound. Oh, the sound. You won't believe it.

"Digital D1 synth is pure ‘80s and ‘90s digital lushness" - Computer Music/Music Radar
"Beautiful. Lush. Modern and Amazing… An Instant Classic."

Requires newer iPads for best performance. May be slow on iPad 4.
IAA is being deprecated by Apple in iOS 13. We're moving to AUv3 as well. Please replace IAA with AUv3 in your projects.

For iPad 4 - Open the "Settings" button (to the upper left above the keyboard). Turn the buffer to 512 or above. And turn the "CPU Efficient" toggle to on. If still having trouble, try closing other music apps and/or rebooting your iPad. Thanks!

Not sure if Digital D1 will work on your device?
Download our free AudioKit Synth One app


** NOMINATED: Best iOS Music Apps of 2018 **
by Computer Music & Future Music magazine.

"The Best Synth For iOS [period]"
"I've been playing synths for 35 years. And, this is as good as it gets"
"The Sound... Perfect!"
"Breathtaking Presets, right out-of-the box"
"The sound quality competes with hardware synths"

You want great sound right away? It has tons of presets.
Plus, the ability to easily manipulate sounds with filters, delays, and other FX.

Easy to use. Easy to get great tone.

+ Mod Wheel can morph between layers. Start with an Electric Piano, and slowly bring in Strings with your MIDI controller.

+ Creative and beautiful live performances.
+ Epic pads that will inspire you

Email us your music & bugs: hello@audiokitpro.com

** This app does not sample any PCM-based synths, including Roland or Korg digital keyboards. Additionally, this app does not have any business relationship with Roland, Korg, or any other 80s/90s Digital Synth manufacturers.

*** All app sounds were created by pure analog and fm synthesis. We took these new sounds. Stacked them. Flipped them. And, processed the heck out of ’em. Resulting in a beautiful new sonic palette for you to enjoy.

What’s New

Version 1.3.1

Thanks, You're Amazing!! We're always updating Digital D1!
+ Arp & Sequencer Mode IMPROVEMENT, reduces hung notes from MIDI
+ Reduce Arp/Sequencer crashes
+ AudioKit TuneUp fixed w/ D1
(Visit audiokitpro.com/tuneup for more information)
+ Scala file import & Master Tuning now more accurate tunings
+ Toggling Reverb on/off has proper mix rate
+ Mono Mode now velocity sensitive from MIDI keyboard
+ New: You can use the "Import" button on the Presets panel in D1 now to import Scala tuning files. The "Import" button will determine if the file you're importing is a preset, bank, or Scala file and import accordingly now.
+ We're working hard on AUv3 improvements daily, please stay tuned. We'll get to all your requests!

V1.3.0 This Update Adds some of your Most Requested Features:
+ Search Presets: On the Presets panel you can now easily find and search through the 500+ included presets
+ Master Tuning: Tuning knob now matches Synth One's range of 410 to 470 (This knob is on the bottom of FX Panel when you hide the keyboard)
+ Open With... : You can now import presets & Banks from Files, DropBox, Email, iCloud using the "Open with..." from iOS, then "Digital D1" will appear. And, in case you missed it, you can also do this with Scala files (SCL). That's right, you can start D1 with the Microtonal Scala file of your choice! (For more information on microtonality and D1, check out audiokitpro.com/tuneup )
+ Fixed: Mono Mode, Glide and other issues from MIDI Keyboard
+ Fixed: On screen keyboard velocity keeps velocity when sliding to new notes

Version 1.2.1
+ This update adds NanoStudio 2 AUv3 & Camelot support And, support for Guitar hosts.

Version 1.2
+ Fixes MIDI keyboard recognition in stand alone mode
+ Fixes Support for iPad 4
+ Add support for 48Khz iPads. (Fixes pitch sounding +1 semitone on some iPads in AUv3)
+ It's recommended you replace IAA D1 with AUv3 in your projects. If you must use IAA, start D1 first standalone before adding to project
Plus v1.1.1
+ AU MIDI now receives Pitch & ModWheel
+ AU MIDI now receives MIDI CC - Use for MIDI Learn or MIDI CC Host Automation
+ Still not seeing MIDI input? Make sure your MIDI Input channel is on 1 or Omni. You can set the MIDI Input in the "Settings" button to the upper left of the keyboard.

+ NOTE: iPadOS Beta AU is not supported yet. But, D1 AU will support it soon
+AUv3 is here. Use D1 as an AU Plugin in your favorite iOS Host!
(GarageBand, AUM, Audiobus, BeatMaker 3, Cubasis, NanoStudio 2, more!)
+ After months of hard work. D1 has been completely rewritten. There may be some bugs. Please be patient with us. :)
+ Improved stability when running multiple instances (we don't recommend running more than 3 instances, though)
** IMPORTANT: Open update in Stand alone first to migrate your existing presets to AUv3

* When freezing in Cubasis, if nothing appears in the audio track, try setting Cubasis to compatibly mode
* D1 is rather robust. It's a beast of a synth.
* We've re-engineered and optimized it so you can run 2, 3 or more instances in one project! Of course, if you go above 3 instances running at once, it may become unstable.
* AUv3 also handles MIDI better. Use your favorite iOS host like AUM to route MIDI to different instances
* AUv3 mode defaults to CPU efficient mode on, which means you don't see the knob animation on LFOs. BTW, this makes it easier to set LFO targets. This can be changed in the "Settings" button to the upper left of the keyboard
* There's a new keyboard hide/show icon that appears at the top of the AUv3 mode to make it easier to show/hide bottom panels in AUv3 mode
* We can't wait to hear the music you make with D1 as an AUv3

* The app will just get better & better - stay tuned!

Email bugs, music, & friendly notes to: hello@audiokitpro.com
We're working hard to improve the app for you!

Stay tuned!

Ratings and Reviews

4.9 out of 5
707 Ratings

707 Ratings

Thehlkffv ,


First off I’m a musician not a sound engineer for movies or anything for that matter. With 400+ presets, and not like some lame presets that you’ll get from other apps which all sounds very similar and the only way to get that sound you’re looking for is to spend hours tweaking it. I have to give major props to the guys at D1 for putting in the works to create such high quality and beautiful sounding presets, and only if I really have to tweak anything it will be very minimal. Of course D1 has all those fancy tweaking nobs but who has time for that when you’re in that moment where you just want to lay down a quick melody or chords. D1 layouts are truly amazing, very simple to use especially for a guy who doesn’t like nobbleing around and this doesn’t overwhelms me at all. I CAN NOT WAIT till they release the AU3 compatible version of this app. Awesome work guys! Keep music alive even though it’ll never die. BTW, I hate writing reviews as much as I hate tweaking sounds but for this app I just have to.

Silk 'n Such ,

Worthy of the Best Hardware Digital/Analog Comparisons

I can say D1 has been an eye-opener as to what the iPad hardware—with the help of AudioKit’s miraculous coding— is capable of creating. This app is worth every cent, especially because it helps fund AudioKit’s freeware app, Synth One. Even if you only use a tiny aspect of the plethora of patches, waveforms, LFO’s and sequencer configurations, one afternoon with it will easily pay for itself in the nearly-limitless rich, frothy sounds the app creates. There are many iPad apps that claim to be powerhouses of electronic music. D1 actually is. And with AUv3 support coming soon (along with the already-robust MIDI and Ableton integration), it will plug directly into whichever DAW you’re using, making it a no-brainer. A true milestone. The iPad is now a professional musical instrument, as far as I’m concerned.

Chimona Chimea ,

Great Synth by a Great Company

Not only is the synth itself really amazing, but it does a great job combining an old technology in a new way. Makes really great pads naturally but also can be used for some faster funky stuff too. The AudioKit team is very responsive to bug reports and is committed to fixing everything they can.

This is a great synth but also realize all the proceeds go to supporting the open source effort of AudioKit. They make free synths for everyone and they provide a free platform to help people make their own audio applications to their apps. I’d get the synth just to support that effort, but it also happens that this is a very nice one of a kind synth for iOS.


AudioKit Pro, LLC
357.1 MB

Requires iOS 10.3 or later. Compatible with iPad.



Age Rating
Rated 4+
© Built with AudioKit
In-App Purchases
  1. Platinum Expansion PCM EXP-01 Free
  2. D1 PCM Expansion-01 Free


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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