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PolyStep Sequencer Player for Reason - YouTube
Propellerhead Reason – Synthtopia
Create, jam and perform with PolyStep Sequencer from Propellerhead | Create, jam and perform music in ways you've never tried before with PolyStep Sequencer–an evolved polyphonic step sequencer for your Reason Rack.
PolyStep Sequencer Player Operation Manual
PolyStep Sequencer | Player device | Shop | Reason Studios