THE OBERHEIM SEM
A SIMPLE MONOPHONIC SYNTH WITH A HUGE SOUND
When Tom Oberheim created the first Oberheim® Synthesizer Expander Module (model SEM-1) in 1974, he had one goal – to make a synth that sounded great, whilst being extremely simple to use. In the decades since the release of this iconic synth, it’s been used by countless legendary musicians, making the SEM one of the most revered synthesizers of all time.
As well as painstakingly recreating the huge, unmistakable sound of the SEM™, the GForce Oberheim SEM also recreates the ethos of the original – a simple monophonic synth that allows you to shape incredible sounds in an instant. And with Tom Oberheim’s seal of approval, you can be confident in its authenticity. Add to this more than 400+ categorised patches, and inspiration is just moments away.

Developed in association with Oberheim
We first worked with Tom Oberheim and Marcus Ryle (an inspirational Oberheim engineer during the 80s) when creating the GForce Oberheim OB-E® v2. During this time, Tom and Marcus revealed that they felt there were no software emulations of the SEM that accurately recreated the sound and the ethos of the original monophonic SEM. We decided to change that, and under the close guidance of Tom and Marcus, we’ve developed the GForce Oberheim SEM to ensure an experience that is truly authentic to the original instrument.
• Patch Selection Over 400 categorised Factory presets
• Arpeggiator & seqenser Quick and straight forward arpeggiator ans step seq.
• Creative Sequenser Extend the arpeggiator section and create intuitive sequences
• Stereo Delay The Stereo Delay can set your SEM in movement
• Lush Reverb & FX Lock The lush reverb can make any sound shine. Lock the FX parameter so they remain the same when changing parameter
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ENHANCED WHERE IT MATTERS
While staying true to the original SEM, we also added a number of enhancements to make the GForce Oberheim SEM even more useful for modern music production. Alongside a new VCO3, which doubles as an LFO with audio rate for additional modulation and FM possibilities, the SEM now has tempo-syncable LFOs with multiple wave shapes, and a host of performance controls via velocity and aftertouch. We’ve also integrated a fun, fast arpeggiator & sequencer, and added a stereo delay and a beautifully lush reverb to sonically compliment your sounds.
Finally, we’ve included 400+ factory patches designed by top sound designers, each created to demonstrate the incredible sonic character of the SEM. Every patch has been categorised and is quickly accessible from the patch browser (arrow navigation friendly). The SEM even integrates with the GForce Oberheim OB-E, allowing users to load their SEM presets in either device. This enables you to quickly sketch out your sounds in the SEM, and then make them polyphonic in an instant.
REQUIREMENTS
Windows on PC. Oberheim SEM I is a virtual instrument in the following formats: Standalone * VST * VST3 * AAX
The Minimum System Requirements are as follows: 2GHz CPU with 2GB RAM * Windows 7 and above
Apple macOS. The Oberheim SEM is a virtual instrument in the following formats: Standalone Application * AudioUnit * AAX * VST2 * VST3
The Minimum System Requirements are as follows: Intel or Apple Silicon Mac * macOS 10.13 or above