Repeatorus LV2 Plugin

LV2 stutter effect with tempo-synced durations. Trigger via UI or MIDI notes.

Plugin controls as displayed by Ardour's default generic UI. Your host may show controls differently.

Features

• Five independent stutter durations. Real-time capture. Tempo-synced durations : whole to sixteenth notes.
• Input sensitivity threshold for trigger detection.
• Toggle between UI and MIDI trigger modes.
• Selectable MIDI channel and assignable MIDI notes per slice.
• Stereo input/output.
• No custom GUI. Host-native controls only.
• No external dependencies. LV2 SDK only.

Project Home

https://simdott.github.io/repeatorus

Plugin URI

urn:simdott:repeatorus

Dependencies

• C compiler (gcc, clang, etc.)
• LV2 development headers

Debian/Ubuntu : sudo apt-get install build-essential lv2-dev

Fedora : sudo dnf install gcc lv2-devel

Arch : sudo pacman -S base-devel lv2

Installation

Using git :

1. Open a terminal (Ctrl+Alt+T)
2. Run git clone https://github.com/simdott/repeatorus
3. Then cd repeatorus
4. And sh install.sh for current user (recommended), or sudo sh install.sh for system-wide installation

Manual download :

1. Download repeatorus.tar.gz from https://github.com/simdott/repeatorus/releases/tag/v1.0.0
2. Extract archive
3. Open terminal in extracted folder (Right Click in folder and "Open in a terminal")
4. Run sh install.sh for current user (recommended), or sudo sh install.sh for system-wide installation

Verification

List installed plugins : lv2ls | grep repeatorus

Should show : urn:simdott:repeatorus

Usage

Load in any LV2-compatible host (Ardour, Carla, Reaper, etc.). Connect stereo inputs/outputs.

Interface: This plugin has no custom graphical interface. It uses your host's standard control UI (sliders, knobs, buttons, and numerical entry).

Controls

Main Controls

Control	Values	Default	Description
Sensitivity	0-100%	50%	0% = only loudest peaks trigger loops, 100% = very quiet sounds trigger
Tempo	60-300 BPM	120 BPM	Base tempo for slice length calculations

UI Trigger Controls

Control	Values	Description
1 beat	Off/On	Enable/disable whole-note stutter
1/8th	Off/On	Enable/disable half-note stutter
1/16th	Off/On	Enable/disable quarter-note stutter
1/32nd	Off/On	Enable/disable eighth-note stutter
1/64th	Off/On	Enable/disable sixteenth-note stutter

MIDI Controls

Control	Values	Default	Description
MIDI Control	0/1	0	0 = use UI buttons, 1 = use MIDI notes
MIDI Channel	1-16	1	MIDI channel for note control
1 beat MIDI Note	0-127	60 (C3)	MIDI note for whole-note stutter
1/8th MIDI Note	0-127	61 (C#3)	MIDI note for half-note stutter
1/16th MIDI Note	0-127	62 (D3)	MIDI note for quarter-note stutter
1/32nd MIDI Note	0-127	63 (D#3)	MIDI note for eighth-note stutter
1/64th MIDI Note	0-127	64 (E3)	MIDI note for sixteenth-note stutter

Basic Operation

1. Set Tempo to match your project tempo.
2. Adjust Sensitivity to determine how easily input triggers loops.
3. Enable desired loop stages using the 1 beat through 1/64th buttons.

MIDI Control Mode

1. Enable MIDI Control.
2. Select MIDI Channel.
3. Assign MIDI notes per duration.
4. Send notes to toggle stutter patterns.

Note : MIDI Control disables UI triggers.

Files

• repeatorus.c - Plugin source code
• repeatorus.ttl - Plugin description (ports, properties)
• manifest.ttl - Bundle manifest
• install.sh - Build and install script
• uninstall.sh - Uninstall script

Uninstallation

If source folder still exists :

1. Open a terminal, then cd /path/to/repeatorus
2. Run sh uninstall.sh for current user, or sudo sh uninstall.sh for system-wide uninstallation

If source folder deleted :

1. Open a terminal
2. Run rm -rf ~/.lv2/repeatorus.lv2 for current user, or sudo rm -rf /usr/lib/lv2/repeatorus.lv2' for system-wide uninstallation

Versions

v1.0.1 (2026-03-23)

• Fix install.sh and uninstall.sh syntax error (replace bash-specific $EUID with POSIX id -u)
• Update README.md installation and uninstallation instructions

v1.0.0 (2026-03-15)

• Initial release

License

GPL-2.0-or-later

Author

Simon Delaruotte (simdott)