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The Oberheim SEM Black Friday deal from GForce Software takes 50% off this monophonic synth plugin, so it costs $39.99 until Dec 1, 2026.
The plugin is a software take on the Oberheim Synthesizer Expander Module, the SEM-1 that Tom Oberheim first built in 1974. His goal back then was a synth that sounded great and stayed simple to use.
GForce built its Oberheim SEM VST with Tom Oberheim's seal of approval, working under guidance from Tom and Marcus Ryle, a former Oberheim engineer.
The voice is built around two VCOs with Pulse and Sawtooth waveforms, two ADS envelope generators, one LFO and the SEM's multi-mode filter.
GForce says every section is emulated, including the analog inaccuracies of the original hardware.
The design stays small on purpose. The maker says you can reach warm basses, soaring leads and sweeping arps quickly, without long menu dives.
The additions are aimed at modern production, and the maker lists these:
The delay and reverb sit inside the plugin, so you can finish a patch without reaching for sends on your bus.
The Oberheim SEM plugin ships with 400+ factory patches from top sound designers, built to sit in a mix. Each one is categorised and reachable from the patch browser, which supports arrow-key navigation.
There is also a librarian for quick preset access.
Presets move both ways between the SEM and GForce's Oberheim OB-E. That lets you sketch a sound in the monophonic SEM, load it into the OB-E and play it polyphonically.
GForce first worked with Tom Oberheim and Marcus Ryle on the Oberheim OB-E v2. During that project, the pair said they knew of no software SEM that captured both the sound and the ethos of the original, which led to this plugin.
Yes. The Oberheim SEM Black Friday deal takes 50% off this GForce Software synth plugin, bringing the price to $39.99. The offer runs until Dec 1, 2026.
You get the monophonic SEM synth with Pulse and Sawtooth oscillators, a multi-mode filter, a sequencer, an arpeggiator, a stereo delay and a reverb. It also includes 400+ factory patches with a librarian and a patch browser.
GForce added a third oscillator that doubles as an audio-rate LFO for FM, tempo-syncable LFOs, velocity and aftertouch modulation, an arpeggiator and sequencer, plus a stereo delay and reverb. Undo/Redo and Extended and Flip modes are also there.
Yes. SEM presets can be exported to and imported from GForce's Oberheim OB-E. You can sketch a sound in the monophonic SEM, then load it into the OB-E to play it polyphonically.
Prices and end dates are checked at publishing time and can change, so confirm them at the store before you buy.