Tom Oberheim Two Voice Pro Dual Analog Synthesizer with Sequencer

37-key Analog Synthesizer with Two Synthesizer Expander Modules, Mini-sequencer, 50+ Patch Points, and Onboard Flash Memory
5/5 2 Write review Item ID: TwoVoicePro
Tom Oberheim Two Voice Pro Dual Analog Synthesizer with Sequencer image 1
Tom Oberheim Two Voice Pro Dual Analog Synthesizer with Sequencer image 1
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Tom Oberheim Two Voice Pro Dual Analog Synthesizer with Sequencer
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The Two Voice Returns

Tom Oberheim's Two Voice Pro Synthesizer is the modern incarnation of his classic Two Voice Synth of the mid-'70s. Still sporting 37 keys, the Two Voice Pro is fitted with - as Tom puts it - "very interesting" upgrades. Of course, you get the essence of what made the original Two Voice a favorite of Tom's, including two classic SEMs (Synthesizer Expander Modules) with a total of four oscillators, a bevy of modulation options, and a mini-sequencer that lets you store your sequences in flash memory. If you've got a taste for vintage analog synth mojo, Sweetwater's got your axe: the Tom Oberheim Two Voice Pro.

Tom Oberheim Two Voice Pro Synthesizer at a Glance:
  • It all started with the SEM
  • Update of a classic synth
  • About those "very interesting" upgrades...
It all started with the SEM

The Oberheim Two Voice Pro has an interesting back story. It all started with Tom Oberheim's original SEM (Synthesizer Expander Module), a surprisingly powerful beast with two oscillators, two envelopes (one each for filter and volume), an LFO, pulse width modulation, and a gorgeous-sounding multimode filter with a unique sweep mode. When Tom started building instruments with multiple SEMS, the first polyphonic synthesizers were born. The Two Voice (incorporating two SEMS) gave musicians four oscillators per key for a decidedly fat analog sound. The Two Voice could play up to two separate pitches simultaneously. Back in the day, this was impressive, indeed.

Update of a classic synth

Like the mid-'70 original, the Oberheim Two Voice Pro is, in reality, two classic Synthesizer Expander Modules sharing the same chassis with a three-octave (C-to-C) aftertouch-enabled keyboard - giving you four oscillators and enough modulation mojo to whip up some serious tone. What's more, each module (both SEMs, mini-sequencer, keyboard control) gives you over 50 mini-jack patch points. A cool bonus is that you can play two sequences simultaneously, or play one sequence while playing the keyboard - just like the old original Two Voice.

About those "very interesting" upgrades...

The Oberheim Two Voice Pro sports an enhanced mini-sequencer. Just as with the original Two Voice, you still generate a sequence using the knobs (up to 16 positions), however now you can store sequences from the knobs into flash memory (up to 99 sequences)! After you store your sequences, you can edit them to add 2-way, 3-way or 4-way ratcheting. You can also program the gate length from zero, almost up to the complete step length - creating some enticing musical compositions in the process. The best part? Your music is juiced with warm, fat analog sound.

Tom Oberheim Two Voice Pro Synthesizer Features:
  • Recreation of a '70s analog classic synth - with modern updates
  • Two classic Synthesizer Expander Modules (SEM)
  • SEMs are 100% discrete analog - no custom chips
  • Two MIDI-sync-capable LFOs per voice, with multiple waveshapes including sample and hold
  • Two programmable ADS envelope generators per voice
  • Selectable master tuning (each VCO or VCO2 only) allows easy detuning for huge unison sounds
  • Enhanced onboard mini-sequencer
  • Store sequences in flash memory (up to 99 sequences)
  • Sequences can be chained into songs
  • Each song step can be programmed for sequence number, transpose amount, and number of repeats
  • Sequencer syncs to MIDI clock
  • Keyboard outputs velocity and aftertouch
  • Each module (both SEMs, mini-sequencer, keyboard control) sports over 50 mini-jack patch points
  • Pitch and modulation wheels, pan pots, headphone output
  • Separate LFO for vibrato
Get your hands on a modern classic synth - the the Tom Oberheim Two Voice Pro!

Tech Specs

Sound Engine Type(s) Analog
Number of Keys 37
Type of Keys Synth action (velocity and aftertouch output)
Other Controllers Pitchbend, Mod Wheel
Polyphony 2 voice
Sequencer 2 x 16-step sequencer, Up to 99 sequences stored, Syncs to MIDI clock
Audio Inputs 2 x 1/4" (B1 in, A1 in)
Audio Outputs 2 x 1/4" (main out), 1 x 1/4" (headphones)
MIDI I/O In/Out/Thru
Other I/O Over 50 patch points
Height 5.7"
Width 26"
Depth 16"
Weight 14 lbs.
Manufacturer Part Number TVS-PRO

Customer Reviews

Based on 2 reviews
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Thank you Aaron for everything you've done, but especially for sending me this masterpiece. This is more than a fabulous, professional instrument, this is nothing less than a work of art. I love that there is no patch memory. This synth was meant to be played; every knob, switch, key, patch cable, and wheel. This beast is a performance oriented instrument bar none. In unison it's just, I'll say it again, massive! And the filters... And the sequencer... This is piece of gear you learn, experiment with, and let it grow with you for the rest of your career. Invest in one while you can.

A Legend Reborn

It's been a banner year for analog synthesis, with absolutely killer new and revived instruments from Moog, ARP, Sequential, Oberheim, and the countless Eurorack modular guys. They're all different, with different voices, just like the difference between a Strat and Les Paul. You really need them all. And while digital synths are meant to be programmed, true analog synths are meant to be *played*. Presets? We don't need no stinkin' presets! Turn da knobs! It's an instrument, not a computer program.But I digress. I've wanted a Two-Voice since they hit the streets in 1975. Trouble is, most 11 yr-olds don't have $5000 (in 1975 dollars) laying around. While $3500 in 2015 dollars may *seem* expensive for a duophonic synth, pound for pound it's a bargain. With the Two-voice, you really have *two* complete synths in one box, plus an analog sequencer and keyboard. And crazy patchable-modular.Of course, what really matters is the sound, and the Obie does not disappoint. With four huge-sounding oscillators and two face-melting filters, you have a weapons-grade analog monster. Add the sequencer, and really go crazy.It's the filters that really set the Obie apart: sweepable low-to-highpass filters, plus bandpass, 12db/octave. But the specs don't tell the story; they truly sound like nothing else. It is just plain huge - no effects needed. You can easily see why this synth was so popular with bands like Rush and Styx in the 1970's. It was later displaced by synths with patch memory, including Oberheim's own OB line. But it was surpassed only in convenience, not sonically: yes, it takes longer to dial in a sound across two synth modules than to push a button, but the end result does not compare.Bottom line: this is one bad*** piece of kit. If you need electric pianos or organs, look elsewhere. But if you want the baddest, meanest, cut-through-the-mix axe, this is the one. Many grateful thanks to Tom Oberheim for all your great products, but especially for recreating the Two-Voice. I can easily see why it's your favorite!
See also: Tom Oberheim, Tom Oberheim Synthesizers