---
name: "japa"
section: "1"
platform: "linux"
package: "japa"
version: "0.9.4-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/japa"
---

# japa(1)

jack or alsa perceptual analyser

## NAME

japa - jack or alsa perceptual analyser

## SYNOPSIS

**japa** {*-h*\|*-A*\|*-J*} \[*options*\]\

## DESCRIPTION

**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. For more information see /usr/share/doc/japa/README.gz.

## OPTIONS

One out of **-A** and **-J** must be given.

- **-h**

  Show summary of options.

- **-J**

  Use jack.

- **-s**

  Select jack server.

- **-A**

  Use alsa.

- **-C -P**

  Enable use of split ALSA devices.

- **-d \<device\>**

  If using alsa: Specify alsa device. Defaults to hw:0.0.

- **-r \<rate\>**

  If using alsa: Specify sample frequency. Defaults to 48000.

- **-p \<period\>**

  If using alsa: Specify period size. Defaults to 1024.

- **-n \<nfrags\>**

  If using alsa: Specify number of fragments. Defaults to 2.

## SEE ALSO

[**jackd**(1)](/jackd/1.md).

## AUTHOR

japa was written by Fons Adriaensen \<fons@linuxaudio.org\>.

This manual page was written by Jaromír Mikeš \<mira.mikes@seznam.cz\>, for the Debian project (but may be used by others).