King of FM: DX Synth/E Piano 4+

#1 DX7 Sounds & Electric Piano

AudioKit Pro

Designed for iPad

    • 5.0 • 134 Ratings
    • Free



Completely Free, Forever! Exclusive sounds from a hit-making synth. Make music. Share it. We want to hear YOU! Feel free to tag me, Thanks - @AnalogMatthew

Classic & new presets, inspired by retro 80s FM Synthesizers used on countless hits! It's like getting a DX7 & SY77 in the palm of your hand.
This is a Premium app: No ads. No subscriptions.
Full app, Everything is included!


This app contains AnalogMatthew's exclusive “Holy Grail” DX7 samples used by Herbie Hancock in the studio. Plus, this app is used by producers for Sting, Jay-Z, Alicia Keys, John Legend, and more!

"Dope! It's in my bag for every session" - Henny tha Bizness, Grammy-winning Producer
“Sounds authentically like the original hardware” – Electronic Musician magazine
"Proves the iPad can be a great sounding, viable synth.” –

"KING OF FM is possibly the BEST FREE iOS MUSIC APP, EVER!" - The GarageBand Guide

PROFESSIONAL! This app can be used as a live instrument controlled with a MIDI Keyboard.
EXPRESSIVE! The main "E Piano" and "Full Tines" sounds have 20+ layers for maximum expressiveness.
Playing live with keyboard supports MIDI Mod Wheel, Pitch Wheel, Program Change, Velocity sensitive sounds, and Sustain Pedal support – All included!

“This app filled my eyes with tears when I first played through the sounds. It brought back memories of my youth, I was transported to a time when anything and everything was possible.” - A grateful musician


• Standalone iPhone/iPad app & iOS AUv3 Plugin

• Over 300+ Presets and over 10,000+ individual samples to inspire you

• FX: Phaser, Chorus, Reverb, Ping-pong delay, Crush, Stereo Fatten, and more!

• Compact! Over 2+ gigabytes of sounds compressed to under 400 mb

• Audio recording: Record your sounds then export wav files! No other apps needed

• Use as an iOS Plug-in in hosts like GarageBand, AUM, Cubasis, Beatmaker 3, and more

• Run on your silicon Mac (Standalone version)

• Includes full lifetime license for both iPhone, iPad, and Silicon Mac

*** We are all volunteers, we do not get paid anything to make this app. We would be humbled if you checked it out. 100% of any proceeds from other apps go to support the AudioKit open-source project ***

Make some music, and share it. Tag us. We want to hear YOU!


KING OF FM is the reboot of FM Player. For the first time, these award-winning sounds are available for iPhone & Silicon Mac. It’s no longer the sound of the past. These sounds are being used on hit records now. This app is the sound of TODAY!

** This app has no official affiliation with Yamaha or the DX7, DX7II, or SY77.
KING OF FM is a free project to bring the joy of music-making to the world. We appreciate Yamaha's beautiful instruments.

** This app has no official endorsement with any artist or producer named in the description (including Herbie Hancock, Jay-Z, Drake, etc). We are humbled they have used our apps. They have received no payment or otherwise compensation for using our apps. :)

What’s New

Version 1.1

Thanks everyone! More free sounds now:
+ NEW Preset Bank by Brice Beasley
+ NEW Preset Bank by Jade Starr
+ Various improvements & fix MIDI learn reset

Ratings and Reviews

5.0 out of 5
134 Ratings

134 Ratings

Nettle Creek 68 ,

I feel like I’m back in the 80’s!!! Amazing!!!

When I heard that this app was being released, I had very high hopes for it. This app/synth did NOT disappoint. I’ve been working with it, for about two hours, and I’m hearing all of the sounds that I grew up with. (I was a teen, in the 80’s, and this was my music!) For instance, the preset “DX Bass 1’ is the exact bass, used for the song “Danger Zone”. As soon as you hear it, you’ll instantly recognize it. There’s just so many iconic sounds!!! If you’ve ever wanted a DX7, like I have, and didn’t want to pay collector’s prices for one… Now, you can!!!

You may be asking yourself, “How can an app, this true to the synths, that it’s trying to emulate, be free?” Because of the immense generosity of Analog Matthew. If you enjoy this app, please review it, and leave him some kind words!

aygkivdkh44444;,.! ,

about the King of FM app

I'm 71 years old and still own an original Yamaha DX7 which I occasionally use as a sound module with my MOXF8. I have installed this app on my iPad, connected it to my MOXF with a Roland UM-ONE, ran the Ipad 4 audio out back into the MOXF A/D in (using the MOXF's built-in effects routed to the A/D in), and disabled FM KING's effects (which slow midi response slightly) and now have a great Ipad sound module for layering the classic FM tines sound with my piano for live performance and recording.
Now to figure out how to disable midi program changes . .
Great Job Audiokit and King of FM!

Light Interactive Media ,

I Got My DX7 Back!

Finally sold my DX7 a few years ago and regretted it. Bought it in 1985 or 86 - who can remember anything from back then? But Now! I have it back! Wonderful sounds from all the contributors plus highly usable sequences. I only play for churches (now that I’ve abandoned those earlier destructive days 😉😇), but this app has plenty of sounds I can use with Camelot Pro, KeyStage, and Audiobus. Thank you Analog Matthew and Audiokit!!!

App Privacy

The developer, AudioKit Pro, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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