KB-1 MIDI Keyboard

KB-1 is a suite of expressive virtual keyboards and controllers designed for a multitude of scenarios.

Play multiple instruments simultaneously, complete with MIDI Polyphonic Expression, scales, chords, strumming and more.

- 8 distinct Keyboard Layouts
- Multiple Rows per Keyboard
- Multiple Octaves per Keyboard Row
- 15+ Scales (for layouts that support scales)
- MIDI Polyphonic Expression (MPE)
- Standalone operation with multiple Keyboards and dedicated MIDI outputs per Keyboard
- AUv3 MIDI Plugin

- Classic (Piano Keys + Wheels)
- Uniform (Seboard-style Keys and Layout)
- String (String-style Keys)
- Scale (Uniform layout with scale support)
- Chord (One key per chord for all scale degrees)
- Drum (up to 16 user mappable drum pads)
- XY (up to 2 configurable XY-Pads)
- CC (up to 16 user mappable knobs for CC control)

- Glide (horizontal)
- Slide (vertical)
- Velocity (mapped to y-axis)
- Pressure (iPhone only)

App Connectivity:
- Standalone
- AUv3 MIDI Instrument

MIDI Connectivity:
- Inter-App MIDI
- Network MIDI

What’s New

Version 1.2

- Added per-keyboard preset mangement including some factory presets
- Added mapping browser including some factory drum mappings
- Mappings can now be imported/exported
- Drum layout can now be set to ouput to individual MIDI channels per pad
- Root Note & Scale can now be changed from the main screen
- Roll/Note Repeat now brings up a dedicated control for setting the repeat rate
- Chord layout can now output the bass note to a 2nd MIDI channel (great for transposing sequences)
- Fixed an issue where the chord layout would not respect the MIDI channel setting
- AUv3: Fixed an issue where the plugin would crash when changing MPE/MIDI Channels
- Drum: fixed an issue where changing octaves per row would have no effect on the drum layout
- Fixed an issue where "Slide sends Aftertouch" option would not restore properly when loading a preset or session
- Fixed an issue where horizontal slide (glide) would not be completly smooth even at max sensitivity
- Fixed an issue where the Maj V7 chord was voiced incorrectly
- Fixed an issue where selecting mappings for the xy controller was not possible
- Fixed an issue where the MIDI output channel for some layouts was off by one when running the AUv3

Ratings and Reviews

4.8 out of 5
80 Ratings

80 Ratings

Enrique Raphaël Page Pérez ,

5 stars not to ruin the rating... but it really is a 4.5 stars product.


Not much to say other than a few complaints:

1) - On ApeMatrix the keyboard layout gets initialized everytime I reload a project (so the scale quantization has to be configured everytime I open the project up), please find a fix for this! Most AUv3 I’ve tried save their configs but for some reason this one doesn’t.

2) - it would be AMAZING if we could have more control over how many keys are displayed in the keyboard: a great AUv3 for this is the Midi Keyboard AUv3 plug-in by Xequence, which lets you define the width of the keys as opposed to simply giving you an “number of octaves” option.

This last one, number 2, is really the reason why I keep on using Xequence keyboard instead. I love this keyboard the most, but one octave is too little on an iPhone and 2 octaves is TOO MUCH. Unfortunately this means more often than not I will simply end up using Xequence’s keyboard instead as it lets me define how many keys I want to have on screen.

I really hope you can at least fix number 2, although number 1 would be hugely convenient too.

Anyway, great app, but it does need these two things.

Regardless, the app is great! Keep up the great work!

ezFish ,

Lovely tool that offers a lot

This type of tool should’ve been standard for all music applications that come out today on iOS. Especially the DAWs. This app is very well implemented as a standalone and Auv3. The settings page for Auv3 could use an improvement to show more info on-screen.

Someone left a recent review that stating this tool didn’t work in Cubasis. Maybe it didn’t once but, it works well now! Now if Cubasis would give me the option to make KB1 the default keyboard, things would be golden!

Reward yourself with the future touch keyboards for iOS.

Ba55head ,

Awesome controller

This is a great controller! I would love it if you added a strum feature and also a browse button for the modes instead of having to plus/minus through them, otherwise it’s awesome!


Kai Aras
19.1 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

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

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