StepPolyArp – Midi Step Polyphonic Arpeggiator

Another MIDI app arrives for the iPad. StepPolyArp works over wifi and not with the MIDI mobilizer. Here’s the app’s description:

StepPolyArp is a midi step polyphonic arpeggiator. The arpeggiator does not play any sound itself, it transmits midi notes to a Mac or a PC to be used in combination with any sequencer, virtual instrument (VSTi, Audio Unit) or midi synthesizer.

The arpeggiator can transform chords into sequences of notes played one after the other in several ways. A matrix polyphonic step modulate arpeggiated notes in time and pitch. The main controllers (velocity, modulation, panning, volume, aftertouch, and pitch bend) are also programmable through a step editor. The integrated keyboard automatically adapts to the selected musical scale.


  • 32 steps programmable matrix
  • 11 configurable transposition lines
  • Features copy and paste
  • 8 octaves virtual keyboard
  • Velocity, modulation, pan, volume, aftertouch and pitch bend step controller
  • The apeggiator and keyboard fit the selected scale
  • 6 arpeggiator modes
  • 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:

  • DSMidiWifi (free)


  • A computer running Mac OS X, Windows Vista or Windows 7
  • DSMidiWifi server (free) installed on the computer for wireless midi connection
  • A sequencer installed on the computer (Logic, GarageBand, Cubase, Ableton Live, Digital Performer, Reaper, ProTools, Sonar, Studio One, …)
  • An iPad with iOS v3.2 or later


iPads at the Apple Store Clip to Evernote


  1. If it's going to be a competitive App, it really needs Line 6 Midi Mobilzer compatability. Some of the best apps now being released are.

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