About StepPolyArp
"StepPolyArp" is a real-time polyphonic and polyrhythmic MIDI step arpeggiator and step sequencer. It can be used as a standalone application or as an AUv3 MIDI effect plug-in. The application and the plug-in can operate...
"StepPolyArp" is a real-time polyphonic and polyrhythmic MIDI step arpeggiator and step sequencer. It can be used as a standalone application or as an AUv3 MIDI effect plug-in. The application and the plug-in can operate as a step arpeggiator, automatically generating melodic patterns from played notes or chords, or as a step sequencer that does not require MIDI input to play. Unlimited presets can be saved locally and synchronized with iCloud. Each preset contains 16 patterns, 5 customizable polyrhythmic step controllers, and a 32-step event matrix with 11 polyphonic and polyrhythmic lines driving the arpeggiator engine. The application supports full internal and external MIDI connections for input and output, Ableton Link synchronization, and MIDI clock synchronization. An internal sound bank is included. The AUv3 MIDI effect plug-in supports multiple instances. A compatible host is required to run the plug-in. The host must support the Audio Unit v3 (AUv3) MIDI effect format. Hosts supporting AUv3 MIDI effect on iOS: Logic Pro, Cubasis, Beatmaker, AUM, Audiobus, NanoStudio, Auria Pro, apeMatrix. Hosts supporting AUv3 MIDI effect on macOS: Logic Pro 10.7 or later. Features: . Standalone application and AUv3 MIDI effect plug-in . Arpeggiator and step sequencer mode . 1 to 32-step programmable matrix . 11 configurable transposition lines . Polyrhythmic lines and clock dividers per line . Mute by line . Gate, velocity, probability, random pitch, random gate, and random velocity per event . 16 patterns by preset . Automatic pattern chaining . 8-octave resizable keyboard . Multitasking support . Stop "Audio Background" automatically after inactivity (15 min, 30 min, 1 h, 2 h, or never) . Sample-accurate timing . Internal sound bank . Tap tempo . Receiving MIDI from external MIDI sources . Receiving external MIDI sync (MIDI clock) . Ableton Link support . Internal routing of inputs, outputs, and MIDI sync . Send MIDI to a virtual port usable as MIDI input by other "Core MIDI" compatible apps . Default velocity, modulation, pan, volume, aftertouch, and pitch bend step controllers . Customizable MIDI setup for step controllers . Arpeggiator and sequencer can conform to the selected scale . Predefined scales and possibility to create custom scales . 6 arpeggiator modes . 1 random mode . 1 chord mode . Randomization panel for generating random patterns with a large number of parameters to control the result . Presets manager . "Program Change" support . Preset sharing via "AirDrop", "Mail", "Messages", and other supported services . Native iCloud support . "iCloud Drive" support in the "Files" app on iOS and "Finder" on macOS . Full support of "Windowed Apps" mode on iPad . Undo/Redo . Lockable keyboard (latch mode) Supported MIDI connections: . Virtual "Core MIDI" connections between applications . Any compatible MIDI interface . MIDI over Wi-Fi . MIDI over Bluetooth . Ableton Link (sync and transport)
Version History • New option to automatically stop Audio Background when the app is inactive (15 min, 30 min, 1 h, 2 h, or never) • Standardized scale names for improved clarity • Minor bugs fixed 5.2 Jan 30 • Minor bugs fixed 5.1.1 11/11/2025 • Full compatibility with iOS / iPadOS 26 • Support for Windowed Apps mode on iPad • Integration of the new menu bar in iPadOS 26 • Stability and performance improvements 5.1 09/24/2025 • Fixed a bug in the grid's "Move Left" function that caused some values to not be shifted • Fixed a bug where the first note of a new pattern is the one from the previous pattern • Minor bugs fixed 5.0.3 04/05/2025 • Custom scales • Gate by event • Velocity by event • Mute by line • A line can be scaled or not • Each line has its own clock divider and can therefore be played at its own speed • An event can be played on a specific cycle. For example, an event can be played on the first cycle, then on the third and fourth • Random pitch by event • Random gate by event • Random velocity by event • Randomization panel for generation of random patterns with a large number of parameters to control the result • In addition to being able to force an arpeggiated event to a chord note position (1, 2, 3, etc.), it is now possible to choose the last or second last note • Added a "reset" button, MIDI control and automation to reset all step positions to zero • Transposition lines have now a range from -36 to +36 semitones • Lines can be reordered by dragging • Each line, controller, pattern can be colorized • The value of a modified control is now displayed • Fixed a sync issue with Logic • Improved MIDI clock sync and Ableton Link accuracy • Fixed a bug where the matrix grid would not display correctly when it was updated too quickly • Fixed a bug where the state of the length marker link button was not preserved when the app was closed 5.0.2 01/27/2025 • Custom scales • Gate by event • Velocity by event • Mute by line • A line can be scaled or not • Each line has its own clock divider and can therefore be played at its own speed • An event can be played on a specific cycle. For example, an event can be played on the first cycle, then on the third and fourth • Random pitch by event • Random gate by event • Random velocity by event • Randomization panel for generation of random patterns with a large number of parameters to control the result • In addition to being able to force an arpeggiated event to a chord note position (1, 2, 3, etc.), it is now possible to choose the last or second last note • Added a "reset" button, MIDI control and automation to reset all step positions to zero • Transposition lines have now a range from -36 to +36 semitones • Lines can be reordered by dragging • Each line, controller, pattern can be colorized • The value of a modified control is now displayed • Fixed a sync issue with Logic • Improved MIDI clock sync and Ableton Link accuracy • Fixed a bug where the matrix grid would not display correctly when it was updated too quickly • Fixed a bug where the state of the length marker link button was not preserved when the app was closed 5.0.1 01/13/2025 • Custom scales • Gate by event • Velocity by event • Mute by line • A line can be scaled or not • Each line has its own clock divider and can therefore be played at its own speed • An event can be played on a specific cycle. For example, an event can be played on the first cycle, then on the third and fourth • Random pitch by event • Random gate by event • Random velocity by event • Randomization panel for generation of random patterns with a large number of parameters to control the result • In addition to being able to force an arpeggiated event to a chord note position (1, 2, 3, etc.), it is now possible to choose the last or second last note • Added a "reset" button, MIDI control and automation to reset all step positions to zero • Transposition lines have now a range from -36 to +36 semitones • Each line, controller, pattern can be colorized • The value of a modified control is now displayed • Fixed a sync issue with Logic • Improved MIDI clock sync and Ableton Link accuracy • Fixed a bug where the matrix grid would not display correctly when it was updated too quickly • Fixed a bug where the state of the length marker link button was not preserved when the app was closed 5.0 01/09/2025 • Minor bugs fixed 4.5.1 10/28/2023 • Compatibility with Logic for iPad • Minor bugs fixed 4.5 05/30/2023 • Minor bugs fixed 4.4.2 03/30/2023 • Added automation parameters to the AUv3 plug-in • Minor bugs fixed 4.4 09/05/2022 • Added support for iOS and iPadOS 15 • Minor bugs fixed 4.3.5 09/24/2021 • Minor bugs fixed 4.3.4 12/16/2020 • Fixed an issue under iOS 14.2 from Core MIDI 4.3.3 12/10/2020 • Minor bugs fixed 4.3.2 12/01/2020 • Possibility to share presets by "AirDrop", "Mail", "Message", and other available services • Minor bugs fixed 4.3.1 10/13/2020 • Possibility to share presets by "AirDrop", "Mail", "Message", and other available services • Minor bugs fixed 4.3 10/13/2020 • Added support for iOS and iPadOS 14 • Minor bugs fixed 4.2.1 09/23/2020 • Improved Audiobus support • Minor bugs fixed 4.2 04/14/2020 • Minor bugs fixed 4.1.13 03/19/2020 • Minor bugs fixed 4.1.12 11/26/2019 • Minor bugs fixed 4.1.11 11/19/2019 • Fixed an issue with the Audio Unit extension on iOS and iPadOS 13 4.1.10 10/25/2019 • Fixed an issue with MIDI over Bluetooth on iOS and iPadOS 13 4.1.9 10/15/2019 • Added support for iOS and iPadOS 13 • Minor bugs fixed 4.1.8 10/04/2019
Previous Versions
Here you can find the changelog of StepPolyArp since it was posted on our website on 2021-12-24 15:14:09.
The latest version is 5.2 and it was updated on 2026-06-23 11:09:44. See below the changes in each version.
StepPolyArp version 5.2
Updated At: 2026-06-02
Changes: Version History • New option to automatically stop Audio Background when the app is inactive (15 min, 30 min, 1 h, 2 h, or never)
• Standardized scale names for improved clarity
• Minor bugs fixed 5.2 Jan 30 • Minor bugs fixed 5.1.1 11/11/2025 • Full compatibility with iOS / iPadOS 26
• Support for Windowed Apps mode on iPad
• Integration of the new menu bar in iPadOS 26
• Stability and performance improvements 5.1 09/24/2025 • Fixed a bug in the grid's "Move Left" function that caused some values to not be shifted
• Fixed a bug where the first note of a new pattern is the one from the previous pattern
• Minor bugs fixed 5.0.3 04/05/2025 • Custom scales
• Gate by event
• Velocity by event
• Mute by line
• A line can be scaled or not
• Each line has its own clock divider and can therefore be played at its own speed
• An event can be played on a specific cycle. For example, an event can be played on the first cycle, then on the third and fourth
• Random pitch by event
• Random gate by event
• Random velocity by event
• Randomization panel for generation of random patterns with a large number of parameters to control the result
• In addition to being able to force an arpeggiated event to a chord note position (1, 2, 3, etc.), it is now possible to choose the last or second last note
• Added a "reset" button, MIDI control and automation to reset all step positions to zero
• Transposition lines have now a range from -36 to +36 semitones
• Lines can be reordered by dragging
• Each line, controller, pattern can be colorized
• The value of a modified control is now displayed
• Fixed a sync issue with Logic
• Improved MIDI clock sync and Ableton Link accuracy
• Fixed a bug where the matrix grid would not display correctly when it was updated too quickly
• Fixed a bug where the state of the length marker link button was not preserved when the app was closed 5.0.2 01/27/2025 • Custom scales
• Gate by event
• Velocity by event
• Mute by line
• A line can be scaled or not
• Each line has its own clock divider and can therefore be played at its own speed
• An event can be played on a specific cycle. For example, an event can be played on the first cycle, then on the third and fourth
• Random pitch by event
• Random gate by event
• Random velocity by event
• Randomization panel for generation of random patterns with a large number of parameters to control the result
• In addition to being able to force an arpeggiated event to a chord note position (1, 2, 3, etc.), it is now possible to choose the last or second last note
• Added a "reset" button, MIDI control and automation to reset all step positions to zero
• Transposition lines have now a range from -36 to +36 semitones
• Lines can be reordered by dragging
• Each line, controller, pattern can be colorized
• The value of a modified control is now displayed
• Fixed a sync issue with Logic
• Improved MIDI clock sync and Ableton Link accuracy
• Fixed a bug where the matrix grid would not display correctly when it was updated too quickly
• Fixed a bug where the state of the length marker link button was not preserved when the app was closed 5.0.1 01/13/2025 • Custom scales
• Gate by event
• Velocity by event
• Mute by line
• A line can be scaled or not
• Each line has its own clock divider and can therefore be played at its own speed
• An event can be played on a specific cycle. For example, an event can be played on the first cycle, then on the third and fourth
• Random pitch by event
• Random gate by event
• Random velocity by event
• Randomization panel for generation of random patterns with a large number of parameters to control the result
• In addition to being able to force an arpeggiated event to a chord note position (1, 2, 3, etc.), it is now possible to choose the last or second last note
• Added a "reset" button, MIDI control and automation to reset all step positions to zero
• Transposition lines have now a range from -36 to +36 semitones
• Each line, controller, pattern can be colorized
• The value of a modified control is now displayed
• Fixed a sync issue with Logic
• Improved MIDI clock sync and Ableton Link accuracy
• Fixed a bug where the matrix grid would not display correctly when it was updated too quickly
• Fixed a bug where the state of the length marker link button was not preserved when the app was closed 5.0 01/09/2025 • Minor bugs fixed 4.5.1 10/28/2023 • Compatibility with Logic for iPad
• Minor bugs fixed 4.5 05/30/2023 • Minor bugs fixed 4.4.2 03/30/2023 • Added automation parameters to the AUv3 plug-in
• Minor bugs fixed 4.4 09/05/2022 • Added support for iOS and iPadOS 15
• Minor bugs fixed 4.3.5 09/24/2021 • Minor bugs fixed 4.3.4 12/16/2020 • Fixed an issue under iOS 14.2 from Core MIDI 4.3.3 12/10/2020 • Minor bugs fixed 4.3.2 12/01/2020 • Possibility to share presets by "AirDrop", "Mail", "Message", and other available services
• Minor bugs fixed 4.3.1 10/13/2020 • Possibility to share presets by "AirDrop", "Mail", "Message", and other available services
• Minor bugs fixed 4.3 10/13/2020 • Added support for iOS and iPadOS 14
• Minor bugs fixed 4.2.1 09/23/2020 • Improved Audiobus support
• Minor bugs fixed 4.2 04/14/2020 • Minor bugs fixed 4.1.13 03/19/2020 • Minor bugs fixed 4.1.12 11/26/2019 • Minor bugs fixed 4.1.11 11/19/2019 • Fixed an issue with the Audio Unit extension on iOS and iPadOS 13 4.1.10 10/25/2019 • Fixed an issue with MIDI over Bluetooth on iOS and iPadOS 13 4.1.9 10/15/2019 • Added support for iOS and iPadOS 13
• Minor bugs fixed 4.1.8 10/04/2019
StepPolyArp version 5.2
Updated At: 2026-01-30
Changes: • New option to automatically stop Audio Background when the app is inactive (15 min, 30 min, 1 h, 2 h, or never)
• Standardized scale names for improved clarity
• Minor bugs fixed
StepPolyArp version 5.1
Updated At: 2025-09-24
Changes: Sep 24, 2025
Version 5.1
• Full compatibility with macOS 26
• Stability and performance improvements
StepPolyArp version 5.0.3
Updated At: 2025-04-05
Changes: Apr 5, 2025
Version 5.0.3
• Fixed a bug in the grid's "Move Left" function that caused some values to not be shifted
• Fixed a bug where the first note of a new pattern is the one from the previous pattern
• Minor bugs fixed
StepPolyArp version 5.0.2
Updated At: 2025-01-27
Changes: Jan 27, 2025
Version 5.0.2
• Custom scales
• Gate by event
• Velocity by event
• Mute by line
• A line can be scaled or not
• Each line has its own clock divider and can therefore be played at its own speed
• An event can be played on a specific cycle. For example, an event can be played on the first cycle, then on the third and fourth
• Random pitch by event
• Random gate by event
• Random velocity by event
• Randomization panel for generation of random patterns with a large number of parameters to control the result
• In addition to being able to force an arpeggiated event to a chord note position (1, 2, 3, etc.), it is now possible to choose the last or second last note
• Added a "reset" button, MIDI control and automation to reset all step positions to zero
• Transposition lines have now a range from -36 to +36 semitones
• Lines can be reordered by dragging
• Each line, controller, pattern can be colorized
• The value of a modified control is now displayed
• Fixed a sync issue with Logic
• Improved MIDI clock sync and Ableton Link accuracy
• Fixed a bug where the matrix grid would not display correctly when it was updated too quickly
• Fixed a bug where the state of the length marker link button was not preserved when the app was closed
StepPolyArp version 5.0
Updated At: 2025-01-09
Changes: Jan 9, 2025
Version 5.0
• Custom scales
• Gate by event
• Velocity by event
• Mute by line
• A line can be scaled or not
• Each line has its own clock divider and can therefore be played at its own speed
• An event can be played on a specific cycle. For example, an event can be played on the first cycle, then on the third and fourth
• Random pitch by event
• Random gate by event
• Random velocity by event
• Randomization panel for generation of random patterns with a large number of parameters to control the result
• In addition to being able to force an arpeggiated event to a chord note position (1, 2, 3, etc.), it is now possible to choose the last or second last note
• Added a "reset" button, MIDI control and automation to reset all step positions to zero
• Transposition lines have now a range from -36 to +36 semitones
• Each line, controller, pattern can be colorized
• The value of a modified control is now displayed
• Fixed a sync issue with Logic
• Improved MIDI clock sync and Ableton Link accuracy
• Fixed a bug where the matrix grid would not display correctly when it was updated too quickly
• Fixed a bug where the state of the length marker link button was not preserved when the app was closed
StepPolyArp version -
Updated At: 2025-01-05
StepPolyArp version 4.5.1
Updated At: 2023-10-28
Changes: Oct 28, 2023
Version 4.5.1
• Minor bugs fixed
StepPolyArp version 4.5
Updated At: 2023-05-30
Changes: May 30, 2023
Version 4.5
• Compatibility with Logic for iPad
• Minor bugs fixed
StepPolyArp version 4.4.2
Updated At: 2023-03-30
Changes: Mar 30, 2023
Version 4.4.2
• Minor bugs fixed
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