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formerly known as B.Slicer

Description: LV2 audio effect plugin for chopping stereo audio input signals. Each chop can be levelled up or down to get a step sequencer-like effect.



a) Install the bslizr package for your system

b) Build your own binaries in the following three steps.

Step 1: Download the latest published version of B.Slizr. Or clone or download the master of this repository.

Step 2: Install pkg-config and the development packages for x11, cairo, and lv2 if not done yet. If you don't have already got the build tools (compilers, make, libraries) then install them too.

On Debian-based systems you may run:

sudo apt-get install build-essential
sudo apt-get install pkg-config libx11-dev libcairo2-dev lv2-dev

On Arch-based systems you may run:

sudo pacman -S base-devel
sudo pacman -S pkg-config libx11 cairo lv2

Step 3: Building and installing into the default lv2 directory (/usr/local/lib/lv2/) is easy using make and make install. Simply call:

sudo make install

Optional: Standard make and make install parameters are supported. Compiling using make CPPFLAGS+=-O3 is recommended to improve the plugin performance. Alternatively, you may build a debugging version using make CPPFLAGS+=-g. For installation into an alternative directory (e.g., /usr/lib/lv2/), change the variable PREFIX while installing: sudo make install PREFIX=/usr. If you want to freely choose the install target directory, change the variable LV2DIR (e.g., make install LV2DIR=~/.lv2) or even define DESTDIR.

Optional: Further supported parameters are LANGUAGE (two letters code) to change the GUI language and SKIN to change the skin (see customize).


After the installation Ardour, Carla, and any other LV2 host should automatically detect B.Slizr.

If jalv is installed, you can also call it


to run it stand-alone and connect it to the JACK system.



The plugin slices a stereo input, amplifies or silences the individual slices and send the whole sequence to the output. Although this affects only the audio signal, it needs a playback running (Jack transport).

The interface is divided into three parts: step controls, monitor and step shape.

###Step controls

  • Sequences per bar : Number of sequences in one bar (1..8)
  • Number of steps : Number of steps in one sequence (1..16)
  • Step control : Coefficient for sound reduction for each individual step


  • On/Off switch: Switches monitor and monitor <-> plugin communication on/off. Reduces CPU load.
  • Scale : Scales the visualization of the input / output signal
  • Monitor : Visualization (l + r signal) the input / output signal for a whole sequence

###Step shape

  • Attack
  • Decay
  • Monitor : Visualization of a single step


You can create customized builds of B.Slizr using the parameters LANGUAGE and SKIN (e.g., make LANGUAGE=RU SKIN=UWU). To create a new language pack, copy src/Locale_EN.hpp and edit the text for the respective definitions. But do not change or delete any definition symbol!

To create a new skin, duplicate src/Skin_Default.hpp, rename it to src/Skin_Default.hpp and edit the parameters. You can also provide a background image at ./surface_SkinName.png.

What's new

  • Locales: DE, IT, FR
  • Do not mute if transport stopped


  • Thanks to LAM and Sahaathyva for translations



Sequenced audio slicing effect LV2 plugin ("step sequencer effect").







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