How do I play audio though jackd from console?

Question

OSS        | play
ALSA       | aplay
PulseAudio | paplay
JACK       | ?

What tool can I use to test if jackd is properly configured and make it play something?

Answer 1

There are many Jack compatible media players, such as mpv (ffmpeg based) and vlc. See this List of Applications

Try mpv --ao=jack test.wav

As well, the jackd2 package in Ubuntu 14.04 comes with a sample program called jack_simple_client which generates a test-tone output.

Answer 2

For a quick test you can do to simulate modem noise.

cat /dev/urandom | aplay

source

Answer 3

Another option is to setup a JACK<-->Pulseaudio bridge such as Cadence, set the Pulseaudio output to "JACK Sink" and then use a Pulseaudio-capable tool such as sox.