Tom Oberheim SEM Pro

Compact Desktop Analog Synthesizer Module with Two Oscillators, One LFO, One Filter, Two Envelopes, MIDI-CV Module, and Two External Audio Inputs
Tom Oberheim SEM Pro image 1
Tom Oberheim SEM Pro image 1

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Tom Oberheim SEM Pro
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An Epic Synth from a Master of Synthesis

Tom Oberheim's name is legendary in the world of synthesis, and the Oberheim SEM Pro synthesizer expander module is proof of his analog prowess. This 100% analog synth gives you two oscillators, two envelope generators, one LFO, and one filter for powerful true-analog sound design. The SEM Pro features the Oberheim MIDI to CV design that allows you to not only control this synth with MIDI, but will also convert that incoming MIDI signal into a CV signal! The SEM Pro gives you 21 CV patch points for true modular synth madness. You can also patch the CV outputs to your other CV compatible gear for even more fun! With a five octave range, analog portamento, and aftertouch response, the SEM Pro is one seriously playable synth.

The Oberheim SEM Pro combines the best of traditional analog synthesis with the needs of today's musicians. The SEM Pro accommodates virtually any MIDI controller, and even has a transpose function to make sure your controller can cover the full range of this synth. You can even control the VCOs, filter, and VCA with velocity, control data, or aftertouch! And if all this sound design potential still isn't enough for you, the SEM Pro's dual audio inputs allow you to route external signals through the synth for unlimited modulation capabilities.

Synth aficionados have been eager for a next-generation Oberheim synth, and the SEM Pro does not disappoint in the least. By combining the best of the analog synths from decades ago, with the music technology of today, Tom Oberheim has an instant classic on his hands with the SEM Pro synthesizer expander module.

Oberheim SEM Pro Synthesizer Expander Module Features at a Glance:
  • True analog synthesis from Oberheim - a sound that has helped shape modern music
  • MIDI to CV module opens up new possibilities in the studio as well as live
  • Rugged, durable design gives you the confidence to make the SEM Pro part of your live rig
  • External audio inputs make the SEM Pro a powerful processing tool
  • Personally autographed by Tom Oberheim
The Oberheim SEM Pro Synthesizer Expander Module is an instant synth classic.

Tech Specs

Sound Engine Type(s) Analog
Polyphony Monophonic
Analog Inputs 2 x 1/4"
Analog Outputs 1 x 1/4"
MIDI I/O In/Thru
Power Supply 24V DC External Power Supply
Height 5.1"
Width 11.4"
Depth 8.3"
Weight 5.9 lbs.
Manufacturer Part Number SEM PRO

Customer Reviews

Based on 4 reviews
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heavenly tone!

why did it take me so many years to end up with one of these? lets blame it on evolution :) what a piece of kit! I will cherish this for the rest of my days. if you're into synthesizers, you need this!
Music background: composer, performer, producer

Oberheim Sem Pro

I'm vey happy with the Sem Pro; really vintage sound and a great add to my other equipment. I happily reccommend it to all vintage synthesizer enthusiasts.
Music background: Hobbyist

Big analog sounds

The SEM Pro sounds incredible. Big thick analog sounds are effortless. The unique filter gives this instrument a character that will compliment other synths, and it always seems to fit perfect in a mix. The patch points turn the SEM Pro into a semi-modular that can interface with other CV gear, which is incredibly useful. Pair this synth with a Moog CP251 for some interesting expansions to the SEMs already comprehensive features and routing.
Music background: Electronic Musician


great sounding Synthesizer the 12 db filter is bright and bold much different then all the analog synths i own. but the main issue wjth the sem pro are its oscillators they disghned in a way that is very musical and flexible not limted. the fine tune maks it easy to create sounds in a fun wayhighly recommanded
See also: Tom Oberheim, Tom Oberheim Synthesizers