japa (audio spectrum analyser for jack-audio-connection-kit) Japa (JACK and ALSA Perceptual Analyser), is a 'perceptual' or 'psychoacoustic' audio spectrum analyser. Possible uses include spectrum monitoring while mixing or mastering, evaluation of ambient noise, and (using pink noise), equalisation of PA systems. By default, the package is built with '-march=native'. If you need a generic package that can be installed on any Slackware machine with the same ARCH as the build host, set FORCE_SLACK_CFLAGS=yes in the script's environment. This package uses POSIX filesystem capabilities to execute with elevated privileges (required for realtime audio processing). This may be considered a security/stability risk. Please read http://www.slackbuilds.org/caps/ for more information. To disable capabilities, pass SETCAP=no to the script.