[linux-audio-dev] [linux-audio-announce] [ANN] JAPA Jack/Alsa Perceptual Analyser

Andres Cabrera andres at geminiflux.com
Mon Aug 8 21:39:32 UTC 2005

Just tried it, and it looks very cool. Could you explain how a room can
be tuned using japa, or point to some reference for this?

Thanks very much,

On Sat, 2005-08-06 at 10:24, fons adriaensen wrote:
> The first (alpha) release of JAPA is now available at
>   <http://users.skynet.be/solaris/linuxaudio>
> >From the README:
> JAPA is a 'perceptual' or 'psychoacoustic' audio spectrum
> analyser. This means that the filters that are used to
> analyse the spectrum have bandwidths that are neither
> constant (as in JAAA), nor proportional to the center
> frequency (as in a 1/3 octave band analyser), but tuned
> to human perception. With the default settings, JAPA uses
> a filter set that closely follows the Bark scale.
> In contrast to JAAA, this is more an acoustical or musical
> tool than a purely technical one. Possible uses include
> spectrum monitoring while mixing or mastering, evaluation
> of ambient noise, and (using pink noise), equalisation
> of PA systems.
> JAPA allows you to measure two inputs at the same time,
> compare them, store them to memory and compare them to
> stored traces. It offers a number of resolutions, speeds,
> and various display options. The dual inputs and memories
> will find their way into future JAAA versions as well.
> This is a source release. You will also need libclalsadrv,
> libclthreads (from the same place), and libfftw3f.
> Enjoy !

More information about the Linux-audio-dev mailing list