caw audio processing program

caw is an interactive, real-time audio processing environment based on libcw. The environment implements a data flow processing model which is specified with a JSON like configuration language.

The best introduction to the language is caw by Example This tutorial steps through the basic language constructs and theory of operation.

Installation

Prerequisites:

Fedora

sudo dnf install autoconf autoconf-archive automake libtool gcc-c++ gdb fftw-devel alsa-lib-devel libwebsockets-devel libubsan  

Ubuntu

sudo apt install autoconf libtool fftw-dev libwebsockets-dev libatlas-base-dev libasound2-dev libubsan1 

Note that libcw will take advantage of the Intel Math Kernel Library if it is enabled via the configure enable-mkl switch.

Build

Get the project code

cd ~/src
git clone https://github.com/currawong-project/caw.git
cd caw/src
git clone https://github.com/currawong-project/libcw.git
cd libcw

Build

cd ~/src/caw
rm -rf build
cmake  -B build/debug -DCMAKE_INSTALL_PREFIX=build/debug/install --preset debug # (or --preset release)
cmake --build build/debug --preset debug
cmake --install build/debug 

Command Line

       caw ui        <program_cfg_fname> {<program_label>} : Run with a GUI.
       caw exec      <program_cfg_fname> <program_label>   : Run without a GUI.
       caw hw_report <program_cfg_fname>                   : Print the hardware details and exit.
       caw test      <test_cfg_fname> (<module_label> | all) (<test_label> | all) (compare | echo | gen_report )* {args ...}
       caw test_stub ...

Test Example Command line

caw test     ~/src/cwtest/src/cwtest/cfg/test/main.cfg /time all echo

Prevent Wireplumber from holding an audio device:

wpctl status                         # get the device id
wpctl set-profile <device-id> off    # disable the device