To Learn More:
https://www.propellerheads.com/shop/rack-extension/polystep-sequencer/
Create, jam and perform music in ways you’ve never tried before with PolyStep Sequencer–an evolved polyphonic step sequencer for your Reason Rack.
Create sequences by drawing in notes, record in real time or record with step input and then let the magic begin. Transpose your sequences in real-time from MIDI input, always in scale. Grab single notes and drag them in the horizontal or vertical to create boxes. These boxes transform into chords, repeats, arpeggios or strumming. Create up to four variations of each pattern, switch between them manually, randomly or in sequence.