StepPolyArp - Midi Step Polyphonic Arpeggiator

for iPad

 Description    Screenshots    Videos    Reviews


StepPolyArp is a real-time Midi arpeggiator to control Midi instruments, sequencers like Logic, Cubase, Live, and all other Midi sequencers, or even other virtual instruments installed on the same iPad. The arpeggiator can automatically generate melodic patterns from notes or chords played in real time.

Although, StepPolyArp is specially designed to operate in Midi, it has own internal sounds bank to use it independently.

Rated "Killer Application" by App4iDevices.


  • 1 to 32 steps programmable matrix
  • 16 patterns by preset
  • Automatic chaining patterns
  • 11 configurable transposition lines
  • Features copy and paste
  • 8 octaves virtual keyboard
  • Multitasking
  • Internal sound bank
  • Tap tempo
  • Receiving Midi notes and control from external devices
  • External Midi sync (Midi Clock)
  • Midi over wifi latency compensation
  • Internal routing of inputs, outputs and Midi sync
  • Send Midi to a virtual port that can be used as Midi input by other Core Midi compatible applications managing multitasking on the same device
  • Velocity, modulation, pan, volume, aftertouch and pitch bend step controller
  • Customizable step controller Midi datas
  • The arpeggiator and keyboard fit the selected scale
  • 6 arpeggiator modes
  • 1 random mode
  • 1 chord mode
  • Unlimited number of saves
  • Random patterns creation
  • Presets manager
  • Presets shared between computer and iPad using iTunes 9.1 or later
  • 128 Undo/Redo levels
  • Lockable keyboard (latch mode)

Supported Midi connections:

  • Midi Wifi Network (RTP Midi)
  • Apple USB camera connection kit
  • Any Core Midi compatible interface
  • Audiobus support

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StepPolyArp Presets

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• SoundPrism Pro and StepPolyArp by ‪Audanika:

• Controlling an Oberheim FVS by Logan Mannstrane:

• StepPolyArp on Apple iPad triggering Moog Little Phatty by Luis Duran:

• Virtual Midi controlling NLogSynth Pro by iDesignSound:

• DSI Tempest with StepPolyArp by Linforlk:

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• Review from Darren Burgos for macProVideo

Want to get arpeggiating in Logic Pro? There's two main ways to set this up inside Logic... but wait, with an iPad you can get hands-on thanks to StepPolyArp app. Darren Burgos shows how.

• Review from App4iDevices

I really love this Arpeggiator... StepPolyArp is really really well thought out. You can create a Pattern (16 patterns available / Preset) very fast, create Accidents, Random, Automations (Velocity, Modulation, Volume, Pan, Aftertouch & PitchBend). 11 "tracks" are available on the grid (you can set their MIDI channel independently). Read the specifications at the end of this post. Watch also the video demo... A Killer App!

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Documentation (PDF)

English, Español, Français


An iPad with iOS v5.1.1 or later

Latest version

StepPolyArp v2.3

Copyright © Laurent Colson - All rights reserved