Propellerhead’s New PolyStep Sequencer Makes Complex Chord Progressions Easy In Reason

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Propellerhead Software has today released PolyStep Sequencer, a new polyphonic step sequencer rack extension for Reason 10.

One of the key features of PolyStep Sequencer is the ability to explore chord progressions and structures in an intuitive way. The engine allows you to transform single notes into chords, repeats, arpeggios or strumming.

Propellerhead Software PolyStep Sequencer


For the detail-minded, each note has separate properties. You can set basic values like pitch and velocity but also go deeper with probability, timing offset, legato and more. And if you have dragged notes in your sequence to create boxes, the properties will allow you to set repeats, chord density, alternate voicings as well as settings for arpeggio or strum. Sequence more instrument parameters with two separate CV tracks for every pattern and variation, like rhythmic control over your synth’s filter or an effect send.

PolyStep Sequencer can be a straight-up polyphonic pattern sequencer, a jam-friendly phrase sequencer, a song writer’s harmonic exploration tool or just about whatever you want it to be. Get started today!


  • Polyphonic step sequencer with real-time, step time or graphical input
  • Scale-aware playback means no off-scale notes (unless you want it)
  • Jam and improvise dynamic arrangements with four evolving variation states
  • Explore chord progressions and chord structures by turning single notes into chords of varying complexity
  • Two CV tracks to control parameters on the instruments you are playing
  • Eight patterns, each with four variations

Propellerhead Software PolyStep Sequencer is available now for $99 USD/99€ via the Propellerhead store.

More information here: Propellerhead Software

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