Letter: J
- jaaa - Jack and ALSA Audio Analyser
- jacktrip - Multimachine jam sessions over the internet
- japa - Jack and ALSA Perceptual Audio Analyser
- jdelay - Jack utility to measure latency of soundcards
- jkmeter - Horizontal or vertical bargraph level meter
- jmess - A utility to save your Jack audio connections (mess)
- jmeters - Multichannel audio level meter
- jnoise - Jack utility that generates white and pink noise