sonic-visualiser (audio file visualiser)

Sonic Visualiser is an application for viewing and analysing the contents
of music audio files. The aim of Sonic Visualiser is to be the first
program you reach for when want to study a musical recording rather than
simply listen to it.

Optional dependencies, detected at build time:

portaudio - allows sonic-visualiser to run without a JACK or pulseaudio
server (using plain ALSA).

jack-audio-connection-kit *or* jack2 - allows sonic-visualiser to use
JACK for realtime audio recording/playback [*].

liblo - allows remote control of sonic-visualiser via OSC.

Note: PulseAudio seems to work but hasn't been thoroughly tested. If you
have problems with the other audio I/O backends, try JACK. See File ->
Preferences -> Audio I/O.

[*] When built with jack-audio-connection-kit or jack2, 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, or build without JACK.