An advanced linear MIDI Sequencer and Keyboard / Controller for iPhone and iPad.

App support / Report an issue Quickstart Guide (download as PDF) Download Korg Gadget Demo Project


  • Efficient User Interface for an amazing editing workflow on a mobile device
  • Scale-aware Keyboard and Pianoroll Editor: All input and editing respects the current instrument's scale
  • Over 70 scales in 10 categories included
  • MIDI File Import & Export (notes, controllers, program changes, track names, etc.)
  • Supports any time signature/BPM (fixed per song)
  • Extremely tight MIDI timing
  • MIDI In & Thru with re-channelization & re-routing to currently selected instrument
  • Ableton Link
  • MIDI Sync Master (Clock/Start/Stop/Continue/SPP) - other DAWs & pattern sequencers can run in accurate sync with Xequence, e.g. to use audio tracks, or an external drum machine. Several modes for maximum compatibility
  • Works perfectly with e.g. AUM / Gadget as hosts / sound generators, drum sequencers like Ruismaker, or Beatmaker 2 for synced audio tracks


  • Unlimited Parts
  • Up to 4 tracks (Unlimited Tracks via In-App Purchase)
  • 64 Undo/Redo steps
  • Per-track non-destructive Swing & Delay (timeshift +/- 200 ms)
  • Any Track can be routed to any Instrument
  • Parts can be independent or linked (editing the original modifies all copies)
  • Part-based looping
  • Program changes
  • Selection tools: Marquee/Rectangle, Same Track, Same Instrument, Linked Parts, Invert, etc.
  • Editing tools: Create Copy, Create Linked Copy, Unlink, Split, Join, Convert loops to parts, etc.
  • All edits can be performed across multiple tracks and parts
  • Global clipboard, even across projects
  • Position/Length Handles at screen edges for efficient editing


  • 256 Undo/Redo steps
  • Fully scale-aware
  • Relative or absolute grid: Snap Events to nearest grid line, or move by grid increments
  • Live Auditioning of all edits and mini keyboard keys on the left
  • Selection tools: Marquee/Rectangle, Same Note, Same Key, Same Beat Position, Invert, etc.
  • Editing tools: Copy, Legato, Quantize, Quantize Ends, Octave +/-, Flip H/V (mirror), Fill part with selection
  • Smart Draw mode: Touch to create, touch again to delete, drag up/down to transpose, drag left/right to change length
  • Global clipboard, even across projects
  • Note velocities can be edited just like controllers, see below:


  • 256 Undo/Redo steps
  • Selection tools: Marquee/Rectangle, Same Beat Position, Invert
  • Selection modes: Add & Replace
  • Editing tools: Copy, Reduce, Quantize, Compress/Expand, Flip H/V (mirror), Ramp (various curves), Fill part with selection
  • Smart Draw mode
  • Note Velocities can be shown as controllers and edited with the same tools


  • Fully scale-aware, very playable single or dual keyboards
  • Glide support
  • Freely adjustable key width
  • Velocity emulation (via vertical position on key)
  • Drum maps and pads, highly customizable (In-App Purchase)
  • CCs (controllers) can be shown as touch ribbons next to the keyboard
  • All CCs can be controlled by sliding (ribbon), device rotation (up to three axes simultaneously), played like a button (sustain pedal, "trance gates"), or by touching the keys at different vertical positions. All highly configurable.


  • Unlimited Instruments (an Instrument is a MIDI destination & channel)
  • 3 definable CCs (Controllers) per Instrument (up to 12 via In-App Purchase)
  • Compatible with virtually ALL synths and hosts


  • Audio & MIDI Metronome
  • Note chasing (notes play even when playback starts in the middle)
  • Robust controller (CC) handling with backchasing
  • Perfect song looping, no dropouts/jitter at loop points
  • Generative music with PolyHymnia (In-App Purchase)
  • Files app support
  • Ruler, either fixed or modal (hidden automatically to preserve screen space)

Apple, the Apple logo, iPhone and iPad are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc., registered in the U.S. and other countries.