[linux-audio-dev] FOSS-tools for realtime audio analysis?

[Alfons Adriaensen]

On Wed, Apr 06, 2005 at 12:32:20PM +0000, mathias_lundgren at bredband.net wrote:

> Are there any tools/libraries around which makes it possible to do 
> something like this? 
>  
> 1) Feed an audio signal (f.ex. a sinus wave) into external hardware 
>  
> 2) Record the signal returned from the external hardware 
>  
> 3) "Compare" the two signals (realtime would be neat, if you know what 
> latency you have btwn output/input I hope this might be achieved w 
> Jack) and perform some kind of analysis of what the external hardware 
> does to the signal (S/N ratio, damping, etc etc). 

You may mave a look at JAAA, (JACK and ALSA Audio Analyser). This is a
realtime 'technical' (rather than musical) spectrum analyser, designed
to make accurate measurements. It will also generate sines and white
Gaussian noise. It's at

<http://users.skynet.be/solaris/linuxadio>

You will also need some small shared libs available from the same
place.

I'm considering some additional functionality, and if you have any
specific requirements I'd be interested to know.

I am also working on a Room Impulse Response measurement system using
a sine sweep as the stimulus. First release expected in a about two
months.

-- 
FA