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Thor synthesizer

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This is a demo of Peff using Reason 4.0 to control an Oberheim S.E.M. with CV and gate signals:

I had Reason sending Note CV and Gate CV signals out through the MOTU 896 into an old Oberheim CPS-1 / S.E.M. module. A bit of tweaking was required to get the note cv scaling set, but after finding the right settings, I had Thor acting as a MIDI to CV converter.

With this Thor patch, it’s possible to control analog synthesizer systems (in this case the Oberheim S.E.M.) from the Reason MIDI Sequencer, Thor Pattern Sequencer, Matrix Pattern Sequencer, any LFO source in Reason, and the RPG-8 Monophonic Arpeggiator. It should also be noted that because the Reason 4.0 sequencer is sample accurate, theoretically, the synchronization should be very solid when sending CV signals through the MOTU audio interface.

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Peff has released a free Reason ReFill that focuses on Thor Polysonic Synthesizer‘s sequencer.


The Thor Polysonic Synthesizer features a step sequencer that offers more features and versatility than Reason’s Matrix Pattern Sequencer. The patches in this refill demonstrate a variety of applications that range from the traditional note/gate pattern source, filter and amplifier gating systems, to complex modulation routings for special effects. Included in the Refill are 16 complete Thor synthesizer patchs, four Combinator Instruments that implement the Thor step sequencer, and two Combinator effects patches that rely on the Thor sequences. 50 pre-programmed step sequences are also included – these are configured in a Combinator to drive a sound from a secondary Thor synthesizer. Also, a granular synthesis Combinator is included with grain lookup driven by a Thor step sequencer.

If you’ve given this a try, leave a comment with your thoughts!

Download page. More details here.