[LAD] Request for open source solution to spectrograms and phasemeasurement

victor Victor.Lazzarini at nuim.ie
Thu Feb 5 13:17:09 UTC 2009

Can he program? I would suggest then that he should try
Python, with scipy/numpy and matplotlib. There are ready-to-go
spectrogram functions, but you can also do your FFTs and
plot them in any way you like.

In general, you get audio as a RIFF-Wave file, there is a simple
interface in scipy to do this. But I suppose you can get RT audio via
PyAudio (portaudio bindings) or the alsa python interface.

About calibration, I am not sure, but I guess this can be done

Other solutions: http://www.sonicvisualiser.org/


----- Original Message ----- 
From: "Ismael Valladolid Torres" <ivalladt at gmail.com>
To: <microsound at hyperreal.org>; <microsound at microsound.org>; 
<linux-audio-user at lists.linuxaudio.org>; 
<linux-audio-dev at lists.linuxaudio.org>
Sent: Thursday, February 05, 2009 12:50 PM
Subject: [LAD] Request for open source solution to spectrograms and 

> Sorry for the crossposting, but I don't know which list is more
> suitable to what I'm asking.
> One friend of mine is looking for a solution based in Linux. I admit I
> don't understand fully what he needs. That's why I am asking to you
> gurus out there... :)
> He needs something for level measurement of spectrograms, callibrated
> as K-14, also for phase measurement. He used [1]a plug-in for Nuendo
> in the past, but now he's looking for a netbook devoted only to this
> task, and he wants to use an open source solution.
> 1. http://www.nugenaudio.com/visualizer.php
> Any suggestions welcome.
> Cordially, Ismael
> -- 
> Ismael Valladolid Torres      http://lamediahostia.blogspot.com/
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