B.Choppr

An audio stream chopping LV2 plugin.

Description: B.Choppr cuts the audio input stream into a repeated sequence of up to 16 chops. Each chop can be leveled up or down (gating). B.Choppr is the successor of B.Slizr.

Installation

a) Install the bchoppr package for your system

Arch user repository by Milk Brewster
Debian by falkTX
Check https://repology.org/project/bchoppr/versions for other systems

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

Step 1: Download the latest published version of B.Choppr. 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. On Debian-based systems you may run:

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

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

make
sudo make install

from the directory where you downloaded the repository files. For installation into an alternative directory (e.g., /usr/local/lib/lv2), change the variable PREFIX while installing:

sudo make install PREFIX=/usr/local

Running

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

If jalv is installed, you can also call it

jalv.gtk https://www.jahnichen.de/plugins/lv2/BChoppr

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

Note: Jack transport is required to get information about beat / position

Usage

The plugin slices a stereo input stream, 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).

In addition to the global controllers, the interface is divided into three parts: step controls, monitor and step shape.

Global

Bypass : Bypass B.Choppr
Dry/wet : Dry / wet mixing

Step controls

Step markers : Defines the size of each step. Drag markers to relocate. Right click to switch between automatic and manual placement
Step level control : Sound level for each individual step
Sequences per bar : Number of sequences in one bar (1..8)
Steps swing : Sets all automatic markers to a swing pattern (1:3..3:1)
Auto markers : Sets all markers to automatic placement
Number of steps : Number of steps in one sequence (1..16)

Monitor

On/Off switch : Switches monitor and monitor <-> plugin communication on/off. Reduces CPU load.
Monitor : Visualization (l + r signal) the input / output signal for a whole sequence. Use mouse wheel or drag to zoom in or out.

Step shape

Blend : Select between linear (for trapezoid shapes) and sinusoidal blend between the steps
Attack : Time (fraction of the respective step length) to increase the level at the begin of each step
Decay : Time (fraction of the respective step length) to decrease the level at the end of each step
Monitor : Visualization of a single step

What's new

Set all markers to "auto" at once
Steps swing option
Plugin description and video tutorial linked
gcc10/std problem fixed

unfa / BChoppr