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 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
• Preset manager with support for in-app purchase packs
• "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 6.0 release notes

• Pattern playback can proceed automatically to the next pattern, to a specific pattern, or even to a random pattern • A pattern can be defined as the default pattern for each playback restart 
• The loop count for chaining to another pattern increments only after all the pattern's lines have been fully read at least once • Redesigned preset selector with support for In-App Purchase packs • Two new preset packs available as In-App Purchases: Analog Sequence and Dance Horizons. Each includes 6 free demo presets. • Reordering the lines no longer causes synchronization issues between the lines during playback 
• The pattern player has been revised to fix issues with automatic sequencing that could, in some cases, cause a step to be skipped • Minor bugs fixed