KORG iM1 4+

90's Synthesizer


    • $29.99
    • Offers In-App Purchases



iM1 v1.2.0 is universal for iPad and iPhone. The iPhone App Store may show "Buy" button if you have the iPad version, but there is no extra charge.

A complete reproduction - and more - of the legendary M1 that defined an era. Mobile Digital Synthesizer for the iPad.

● Selected by Apple as "App Store Best of 2015"
● Ranked #1 on the App Store on Top Paid Music category in more than 20 countries! (15/5/27)

Since it went on sale in 1988 the legendary M1 music workstation rapidly achieved record-breaking sales, becoming a mainstay of the music scene from the late 1980s and beyond. The common element of electronic instruments that have left their name in history is that they had a unique sound that was difficult if not impossible to replicate. Sounds such as the “M1 Piano” is instantly recognizable and have appeared on countless hit records over many years, and yet these are sounds that could only be produced by the M1. And that’s what you can now have on your iPad!

● A faithful reproduction of the original M1 Sound
The PCM data provides the library of the original M1. For the hardware, we analyzed the circuit diagram of the original design, and completely replicated it in software down to the last detailed parameters. Engineers with an exhaustive knowledge of the M1 made careful adjustments in order to obtain the sound of the original unit, something that cannot be obtained simply by sampling the original sounds.

● A continued evolution of the M1
Not content with simply reproducing the original, iM1 provides further evolutionary developments. Synth parts now have the Filter Resonance that was requested at the time of the original. The effect parts, originally consisting of only two effects, have been powered-up to 18 effects. The user interface has also been refreshed with additions such as a KAOSS pad. iM1 is the ultimate version of the KORG M1.

● A gigantic library encompassing 3,300 sounds and 34 cards*
In addition to all 19 of the ROM cards originally released for the M1, iM1 also covers the sounds of the M1EX which expanded the internal PCM of the M1, as well as the sounds of the T-series which appeared as an evolution of the M1. There’s also “BEST OF M1”, a selection of 100 great M1 programs. The new “Smart Sound Browser” makes it quick to find the desired sound. You can also view the sounds ranked by how often they are selected by iM1 users around the world.
*with all the expansion card installed via in-app purchase

● KAOSS pad lets anybody perform
iM1 features a KAOSS pad from the popular KAOSSILATOR, allowing you to perform intuitively just by touching the screen. By using the dual KAOSS pads to play phrases or adjust the sound, even people who are not accustomed to keyboard instruments or knowledgeable about synthesizers can enjoy performing the iM1. There’s also a conventional keyboard, as well as the “Smart Keyboard”, which lets you specify a scale setting and play phrases with a single finger.

● Use with KORG Gadget for song production
iM1 can be used together with Gadget, the music production DAW app that won the App Store Best App of 2014 award in Japan. If both apps are installed, you can use iM1 as a sound module within Gadget, taking advantage of the program sounds in iM1 for music production. iM1 also supports Audiobus and Inter-App Audio, so it can also be used for GarageBand etc.

● Connect a MIDI keyboard and use as a sound module
In addition to enjoying iM1 on its own, you can connect a USB MIDI keyboard* via a Lightning adaptor and play the iM1 as an external sound module. You can easily take along an even more powerful workstation sound module as part of your iPad-based compact mobile system.
*microKEY, nanoKEY etc.

● Interchangeable with the KORG Legacy Collection and the original M1
Sounds that you create in iM1 can be sent from your iPad via iTunes to a Mac/PC. If you have the Legacy Collection M1, you can use those sounds in a DAW.

More info at korg.com

What’s New

Version 1.2.0

- iPhone is now supported.
- AUv3 is now supported. You can use iM1 in other iOS music production apps.
- Various other tweaks have been made to improve stability.

Ratings and Reviews

4.7 out of 5
680 Ratings

680 Ratings

Myrkskog ,

The best all around virtual instrument synth from KORG!

I own the majority of Korgs iOS apps and this one kinda takes the cake on features alone. I would also suggest getting the in app purchases for this! You can program your own drum kit with a keyboard chase option! I am ecstatic because I have really been searching for an easy way to map drums to my Arturia beatstep without remapping midi notes. You can also map any sound to a key on the drum kit and it will auto assign the lower pitched notes with a no assign slot. Going to got absolutely bananas with drum kits now! Not to mention this thing does practically any instrument sound aside from heavily modulated stuff. My gripes are bit of a high learning curve for beginners, and it has no easy mixer page (could just be on master fx page) aside from adjusting each instruments volume one at a time. The app sounds awesome and is a great addition to iOS music making. After touch supported for the seaboard like gear. Also works great with geoshred more mode, but I just record audio for that because I don’t know how to record mpe midi into cubasis. Midi routing is pretty good and allows channel selection but lacks source option. Software manual is online. Obligatory comment about Korg not making audio units (or allowing them in gadget) for apps like aum3, cubasis, etc. Use aum + rozeta sequencer suite/atom + midiflow + this... for a good time. 🤪

apple-guy-73 ,


Updated to 5 stars (sorry rewrote my review but neglected to update the rating)! The addition of AUv3 pretty much makes this the perfect synth unit. I use it for everything. Keys, as a guitar synth with guitar midi in AUM. Given the age of the app I was not certain whether Korg would update it. Long live the M1! Original review. The M1 workstation was and remains one of my favorite platforms. Lately, I’ve been trending to a lot of my music on iOS. It’s just way more convenient to bring one, or even two iPads vs trying to arrange the perfect set of keys layouts. Especially for me since I play several other instruments and often need to bring these to live performances. I have no problem paying $40 for this particular app given the amount of power, but the lack of AUV3 support is a huge detriment. There are free synths out there like King of FM that inter operate with AU hosts and this is a game changer. With the power of the M1 sound library, I find I don’t use this app much if at all any more and it makes me sad. Please Korg we beg you - make this AUV3 compatible! For those of us that have paid for this (I bought it when it first came out) and for those that yet haven’t - I guarantee that this extension would tap into unrealized revenue for Korg.

Developer Response ,

Hello again.
Thank you for the new review and for the kind words!
As said, we hope the KORG iM1 can bring lots of inspiration to your music, always.
Please enjoy!
Best regards,
KORG App Team


iKorg M1 serious ambient Ipad performance

For years I’ve toyed with music apps on my iPad and iPod each one provided some amount of fun pleasure and intrigue all at the same time accompanying my dream that one day these music apps would be very aligned within a classical musicians intention .few years ago music apps began to show serious dedication to the possibility that series musicians were using them .KORG is one of a handful of dedicated companies to be friend the dedicated lightweight compact portable artist like myself and offer their classic KORG M1 synth KEYBOARD in a portable downloadable iPad app form .since downloading it and learning it and custom designing the massive sound library to my ambient taste I’ve never hesitated to introduce these sounds into my live and recorded performances with confidence,with joy and with aesthetic delight.

App Privacy

The developer, KORG INC., 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 Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

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

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