iSEM Synthesizer 4+


Designed for iPad

    • 4.1 • 60 Ratings
    • $9.99

iPad Screenshots


Apple’s AudioUnit v3, Inter-App Audio connectivity, AudioBus 3, Korg’s WIST and Apple’s CoreMIDI are all supported.

Furthermore, iSEM is fully compatible with the Audio Unit Extension format. It can be directly launched in any Audio Unit host applications.

iSEM is a recreation of the classic 1974 Oberheim SEM (Synthesizer Expander Module), one of the world's first self-contained synthesizer modules and the first to bear the "Oberheim Electronics" name.

The Oberheim SEM was made famous by artists and bands such as Lyle Mays, Jan Hammer, Joseph Zawinul, Supertramp, 808 State, Vince Clarke and Depeche Mode.

Based on the TAE® technology found in our Oberheim SEM V software, iSEM brings back the sound and special characteristics of this iconic synth in an sonically accurate and expanded touch-based emulation.

What you can do with the iSEM?

The iSEM is a powerful instrument capable of producing a wide range of warm analog sounds. 

Reproducing the unique SEM architecture, with its oscillator sync, characteristic filter shape and specific envelope response, the iSEM is able to generate the fat basses that have made the Oberheim brand so popular. Thanks to its simple and clever PW and pitch modulations, it is also very easy to produce moving and lively leads.

Its remarkable 12 dB/oct multimode filter is a real blast from the past, becoming an awesome weapon in the context of current electronic music. This unique module can instantly tailor your sound to fat, crisp, or spectral textures with access to all the nuances in between…

iSEM comes with over 500 sounds that you can browse through and play. You can also easily create your own sounds with the easy to use interface.

Play iSEM's numerous sounds from the iPad keyboard or control iSEM from a MIDI keyboard or other app via CoreMIDI and integrate it into your studio or live performance.

If you are an owner of of the Arturia SEM V software on your Mac or PC, you can even import and export sounds between your laptop or desktop SEM V and iSEM.

All the original parameters of the Oberheim SEM: two oscillators, each offering sawtooth wave and variable-width pulse wave with PWM, sine wave LFO, 12dB/oct multi-mode Filter with low-pass, high-pass, band-pass and notch, two ADS envelope generators.

Added functionalities: New LFO, Noise, Sub oscillator, Arpeggiator, Portamento.
Polyphonic playability
8 Voice Programmer module allows each voice to have different settings
HOLD and CHORD modes.
Virtual Analog Chorus.
Virtual Analog Delay.
Full user MIDI mapping of panel controls.
Supports WIST sync to other iOS devices.
Support of AudioUnit Extension, AudioBus 3 and Apple’s Inter-App Audio connectivity.

The Oberheim™ name used here is a trademark of the Gibson Guitar Corp. The trademark is used by license to Arturia.

What’s New

Version 1.5

- Updates and bugfixes for iOS 13
- Upgrade AudioBus to Version 3
- Improved Startup Time

Ratings and Reviews

4.1 out of 5
60 Ratings

60 Ratings

TBMisamazing ,

Almost perfect

This is, and probably will always be, one of my favorite synth apps. For the most part it integrates well with AU host apps, but it has its shortcomings. First, it takes forever to load in GarageBand. Also if you have a MIDI controller mapped to adjust parameters using it as a stand-alone app, the controls won’t respond when using it as an AU, which makes it to where you can’t tweak sounds live using your controller unless you use IAA.

BitBangr ,

Great Sounds, Still Buggy and Lacking Comprehensive AUv3 Support

I took a risk on this seeing the bugs and crashes others reported. While I haven’t managed crashes, and the sound remains amazing, it’s still missing some basic stuff and has bugs or at least poor behaviors.

The poly/mono setting is inaccessible when used as an audio unit (in standalone the setting lives on the keyboard, which is removed in the audio unit), making experimenting in a host app like AUM or Garageband somewhat limited or cumbersome.

The current envelopes can cause clicks and pops in some mono and lead patches. They have no setting to behave like classic analog envelopes do and starting the envelope from the level at the time of keyboard press, instead always starting from zero. This might be the behavior of the original Oberheim Polyphonic synths (I don’t own one so IDK), however the implementation results in some mono sounds (including the factory lead preset Discomfortz) to audibly click and pop when you trill them by holding down a note and repeatedly tapping a neighboring note, or in legato playing. Either being able to change envelope retrig behavior or a bug fix for the current implementation to allow this kind of playing (which is clearly intended by the included patches) without inducing such noise would be great.

SneakyT ,

Really needs pitchbend range and replies from support would be nice....

I would love to give this a better rating but a few things keep that from happening. I find it pretty crazy that you cannot set the pitchbend range in this day and age. I thought I must be missing the setting somewhere. When I sent a message to support about it I got no reply whatsoever but they did send me an advertisement about the matrixbrute. That's really not acceptable. I know that I didn't pay a ton of money for this but you can at least answer a simple question. It's unfortunate because this synth really sounds great. If it had a pitchbend range setting, a responsive support staff and MPE support I'd happily give it five stars. If it just had pitchbend range I'd give it four stars. By the way I would happily pay for an in-app purchase for MPE and pitchbend range.

App Privacy

The developer, Arturia, 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

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  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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