A Legend at your Fingertips

iSEM is our physical model of the legendary 1974 Oberheim® SEM synthesizer expander module, now available for iPad®.

iSEM is an amazing recreation of the legendary 1974 Oberheim® SEM synthesizer expansion module. Known for its characteristic multimode filter and rich oscillators, the SEM is revered by many for its sonic power and flexibility.

Based on the TAE® technology found in our award-winning SEM V software, iSEM faithfully recreates this unique synthesizer and offers a level of sound quality that only Arturia can bring to the iPad®.


Free all the potential of the legendary Oberheim® SEM thanks to the Audio Unit Extension. In addition to being compatible with Audiobus and Inter-App Audio, iSem can now be launched directly in every Audio Unit host app such as GarageBand, offering you the same comfort and workflow as with a computer-based home studio. No more doubt is allowed, whether it is at home, on the road or on stage, with iSEM your iPad becomes the new core of your setup.


  • Audio Technology

    On iSem

    “Cheerfully cheap and sounds fabulous.”

  • Audio Technology

    On iSem

    “iSEM brings it all “kicking and screaming” into this day and age by making the most of the latest developments available to its iPad host.”

  • Keyboard Magazine

    On iSem

    “OVER THE PAST DECADE, ARTURIA HAS DONE A TERRIFIC JOB OF DELIVERING virtual versions of some of the world’s most famous vintage analog synths, rightfully earning accolades and endorsements from top artists and journalists.the iSEM is a fantastic synth—among the best available for iOS, actually. So, if you’re looking for another analog flavor in your iPad rig, I heartily endorse this app.”

  • KRHome Studio

    On iSem

    “Arturia realizes a new tour-de-force recreating a famous vintage synthesizer on iOS platform. the implementations are worth getting the ISEM that is truly comprehensive and simple to operate. a small wonder to install urgently on your iPad !”

  • Recording

    On iSem

    “I can say that iSEM sounds great, with a thick and rich sound that’s full of character and offers a wide range of programming possibilities that will please synth-heads with a yen to put an Oberheim® in their pocket”

  • Sound On Sound

    On iSem

    “This is a superb analogue-sounding synthesizer that can evoke memories of an SEM and much more. Simply great value for money.”

  • Harmony Central

    On iSem

    “If you're a musician and you have an iPad, you need this app! Five bucks for something this good is simply insane. Even at the regular price of ten dollars, this synth is an absolute steal.”

  • Computer Music

    On iSem

    “iSEM is brilliantly and respectfully realised, and sounds truly gorgeous; and with AudioBus and Inter-App Audio also on the feature list, it’s a must-have for any iPad musician.”


We’ve added a few new features and some of the extra functionality that people have come to expect from Arturia products. Our 8-Voice Programmer allows you to mimic the polyphonic sounds of the classic 4- and 8-voice versions as well.

The Modulation matrix greatly expands the sonic capabilities of the original. And the effects page, performance page, Apple Inter-App connectivity, Core MIDI, AudioBus: all work together to make iSEM a supreme sonic workhorse and creative force multiplier.




Main Features

All the original parameters of the Oberheim® SEM:

  • two oscillators, each with 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 features:

  • An additional LFO
  • Noise generator
  • Sub-oscillator
  • Arpeggiator
  • Portamento
  • Modulation Matrix module
  • Advanced Keyboard Follow module

8-Voice Programmer module with multiple playback modes

Onboard effects (overdrive, chorus and delay)

Hundreds of sounds from some of the world’s best sound designers

Background audio support

Inter-App Audio

Audiobus support

Supports WIST sync with other iOS devices


Preset compatibility with the Arturia SEM V Mac/PC software

Owners of iSEM and SEM V can exchange presets via iTunes file transfer

Required configuration

iSem requires at least an iPAD 2 and OS 6.0 or later.

Oberheim® is a registered trademark of Tom Oberheim®, which is in no way associated or affiliated with Arturia