iPad Screenshots


iMS-20 is an analog synth studio; a complete recreation of the Korg MS-20 synth, an analog sequencer, a drum machine, and even Korg's Kaoss Pad technology. Plus, you can share your songs online via the SoundCloud!

iMS-20 is a complete music production app for iPad. It consists of a complete recreation of the legendary Korg MS-20 analog synth with the patching capability, plus a 16-step analog sequencer based on the Korg SQ-10, a six-part drum machine which can create drum parts by simply tapping the buttons, and a seven-channel mixer with 14 types of effects.

In addition, iMS-20 offers dual Kaoss Pads allowing you to generate music by simply stroking the pad and moving your fingers over it. Experiment to come up with wild musical phrase! And with access to the SoundCloud audio platform*, you can publish your songs, or collaborate on ideas with people anywhere in the world from within the app!

• MS-20 monophonic synthesizer : 1 unit
• Analog sequencer : 1 unit
• 6-part drum machine : 1 unit
• Mixer : 1 unit
• Song/Pattern composer : 1 unit

MS-20 monophonic synthesizer:
• Analog modeling synthesizer (MS-20 modeled by “CMT” Component Modeling Technology)
• 2VCO / 2VCF / 1VCA / 2EG / Patch Panel
• Additional functions : Modulation Key/Tempo Sync
• Insert effect (selectable from 14 effect types as below)

Analog sequencer:
• 16-step analog sequencer
• Control notes, volume, pan, parameters, and voltages via knobs
• Configurable steps (1-16) and sequence mode (6 types)
• Trigger out per channel or step position

6-part drum machine:
• 6-part/16-step drum machine
• Create sounds by sampling a single note from a built-in MS-20
• Controllable notes, volume and pan by knobs
• Configurable steps (1-16) and sequence mode (6 types) per a part

• 7-channel mixer
• Double needle meter indicates VU level
• Master effect (selectable from 14 effect types as below)

Song/Pattern composer:
• Compose a song or select a pattern, built-in mixer
• 16 patterns and 256 bars per a song
• Tempo setting (20-300 BPM) and Swing function

Effect type:
• 14 types : Short Delay, BPM Sync Delay, Reverb 1, Reverb 2, Chorus/Flanger, Equalizer, Compressor, Tube Simulator (Valve Force), Low-Pass Filter, High-Pass Filter, Band-Pass Filter, Talking Modulator, Decimator, Grain Shifter

• Keyboard : Variable width (22, 26, or 29 keys)
• Kaoss Pad : 2 units
- Performance pad : Key/Scale (31 types) settings
- Parameter control pad : X-Y axis parameter settings

• Audio export function (Bouncing a song or pattern, and Real-time recording a performance: 16-bit/44.1 kHz stereo WAV format)
• Publish and share songs online with the SoundCloud audio platform
• Various template patterns by music genre are included
• Various template sounds by sound category are included

* You will need to register for a SoundCloud account in order to use SoundCloud. Also, when using SoundCloud, you must observe SoundCloud Ltd.'s terms of use, such as the prohibition on uploading songs whose copyright is the property of a third party. For details, refer to the SoundCloud website : http://soundcloud.com

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What’s New

Version 1.7.3

• Now supports iOS13.
• Other improvements and bug-fixes.

Ratings and Reviews

4.6 out of 5
163 Ratings

163 Ratings

BWallHair ,

New Favorite Instrument!

I use the iMS-20 on my iPad 2. I have several other synth apps, but none I have found offer such a vast combination of sound generation possibilities. This app does it all, if you take the time to learn about this program. The info in the manual is great for beginners, too.
With enough knowledge, one can emulate virtually any musical instrument and produce an entire composition from rhythm to lead.
This app offers so much for so little, compared to prices of physical synth machines. You can even utilize dual kaossilator pads or a virtual keyboard for live performing or recording.
If you make music or are interested in learning how to create electronic beats, this app is a must have. As a newcomer to synthesis, the challenge of understanding, alone, is enough to occupy my focus for hours.
My favorite aspect to using this app, are the results I see while merely using the app. Becoming familiar with the array of variations and manipulations available will perhaps keep me entertained and learning for years to come!

RoadNinja007 ,

Korg Has Done It The Best

High price for an app but definitely a steal. Can I just say one word. MIDI! Put your iPad in an Alesis IOdock and connect a midi device. For example: MAudio keyboard etc. I am surprised they haven’t raised the price on this. The best time to catch it is during the holidays when apps normally go on sale. And thank you so much Korg for the continual updates.

dysamoria ,

Pluses and minuses, but mostly good


• Beautiful GUI. This iOS version has a much better GUI compared to the desktop AU/VST version. Nice icon too :-)

• Compatible with the mini MS-20i USB controller keyboard (yes, you can do patching in this synth via the hardware controller).

• Great/classic sound ability, x2 synths, and drum sounds.


• No Korg Gadget integration.

• No IAA transport controls. This is a problem with ALL of Korg's apps.

• Poor MIDI support, making this more of a standalone audio source, rather than an interactive performance synth.

• Lousy sequencer for modern devices. It's fine to mimic old analog sequencers in software, for fun and certain sequencing styles, but not when that's the ONLY option on offer. iDS-10 makes iMS-20's sequencing look like childish, primitive, unusable garbage. iDS-10 and iMS-20 share so much in common that it might have been better for Korg to release an iDS-20 (merging the best of both worlds).

• No polyphonic mode. The desktop MS-20 plugin supports polyphony, so there's no reason not to have it here as an option.

• Fiddly controls. This is a problem with ALL of Korg's apps, especially Gadget.

• No data exchange via email.

• No data exchange at all (the Soundcloud integration is absolutely NOT acceptable for patch exchange).

App Privacy

The developer, KORG INC., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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