KQ Dixie

KQ Dixie is a 6-Operator FM synthesizer that is modeled on the synthesizer which appeared on the 1980s.

Contact Information is here.
Reference manual is here.
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FM synthesizers make sounds with Frequency Modulation.
FM brings rich and brilliant sounds which are impossible to create with analog one.
It makes very complex waves with simple modulations.
The same method is used for a radio.
The synthesizer gained much popularity in the 1980s.

This app lets you make sounds freely with 156 voice parameters.
Almost all parameters are compatible with DX7.

Audio Unit v3 compatible.
Audiobus compatible.
32 algorithms included.
You can manage the hardware DX7 when it is connected with external MIDI cables.
Supports DX7 System Exclusive Messages (SysEx) and syx files.
Supports Zip files.
You may be able to find a lot of patches on the internet.

Bug Information

Version 1.0.5 or below

LFO on amplitude modulation was inverted.
(Saw up should have increased the amplitude but actually decreased.)
This bug is fixed on version 1.0.6 or above.

Version 1.0.1 or below

The app might crash if iCloud is off.
This bug is fixed on version 1.0.2 or above.

Version 1.0

The app crashed when file name contains spaces and/or other special characters.
This bug is fixed on version 1.0.1 or above.

Update history

Version 1.2

  • MIDI CC Assignment. You can control all parameters via hardware MIDI knobs and sliders.
  • Added MIDI Output on Audio Unit Extension. You can record knob controls to some AU host on iOS 11 or above.
  • Supported “32 stripped 1 voice” (4960 bytes file).
  • Added links to my web site.
  • Changed Keyboard behavior.
  • Other small fixes.
  • Released on 2018-12-12

Version 1.1.6

  • Supports iOS 12.1.
  • Changed the behavior of Safe Area on Audio Unit.
  • Released on 2018-11-13

Version 1.1.5

  • Bug-fix: The layout collapsed when opening a file on iPhone which has a notch.
  • Other small fixes.
  • Released on 2018-10-12

Version 1.1.4

  • Added a “Init” patch.
  • Enabled a directory, “On My iPhone/iPad” at Files.app.
  • Released on 2018-10-4

Version 1.1.3

  • A bug-fix: The Zip-like files were always opened in KQ Dixie at Files.app.
    As a side effect, “KQ Dixie” disappears from “On My iPhone/iPad” at Files.app.
    In addition, Zip and Syx files may not open out from Files.app when you installed the past version once.
    In that case, Copy files to iCloud, Start KQ Dixie application, and Open them.
  • Released on 2018-9-22

Version 1.1.2

  • iOS 12 support.
  • The character size at the patch list on the cart has become larger on iPhone.
  • Other small fixes.
  • Released on 2018-9-14

Version 1.1.1

  • Bug-fix: SysEx files were labeled as unsupported when you added those via iTunes.
  • Released on 2018-2-21

Version 1.1

  • Added More Accurate Emulating option.
  • Fixed a glissando behavior.
  • Released on 2018-2-21

Version 1.0.9

  • The Inter-App Audio panel was not displayed when launching from the host.
  • Released on 2018-2-14

Version 1.0.8

  • Fixed Audiobus issue.
  • Supports 32-bit devices (no guarantee).
  • Released on 2018-2-7

Version 1.0.7

  • You can choose on-screen velocity slider or modulation wheel.
  • Improved memory management.
  • Other small fixes.
  • Released on 2018-1-30

Version 1.0.6

  • LFO was inverted on amplifier modulation.
  • Sometimes LFO parameters were not loaded.
  • Released on 2018-1-24

Version 1.0.5

  • Specific Zip files caused App crash.
  • Folder structure in specific Zip files was wrong.
  • Released on 2018-1-21

Version 1.0.4

  • The Audio Unit screen size is flexible if the host supports it.
  • You can hide the on-screen keyboard.
  • The app detects the character encodings of Zip files automatically.
  • Bug-fix: Displaying files had a glitch at the first launch.
  • Other small fixes.
  • Released on 2018-1-19

Version 1.0.3

  • New feature: Quick-Saving.
  • Saving 32+1 voices supported.
  • Renaming files supported.
  • Exporting files supported.
  • You can hide unsupported files in Zip files.
  • Reduce noises when volume or pan changed.
  • Some crash bugs are fixed.
  • Other small fixes.
  • Released on 2018-1-16

Version 1.0.2

  • Copying files supported.
  • Folder view in Zip archive supported.
  • Fixed some crash bugs.
  • Released on 2018-1-13

Version 1.0.1

  • Bug-fix: The app crashes when file name contains spaces.
  • Released on 2018-1-11

Version 1.0

  • The first release.
  • Released on 2018-1-11

Yamaha DX7 is a trademark of Yamaha Corporation.
I have no business relations with Yamaha.