5 Feb
2009
5 Feb
'09
8:50 a.m.
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
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5 Feb
5 Feb
9:11 a.m.
New subject: Request for open source solution to spectrograms and phase measurement
Ismael Valladolid Torres skreiv:
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 should check out sonic visualiser:
http://www.sonicvisualiser.org/
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9:17 a.m.
New subject: Request for open source solution to spectrograms and phasemeasurement
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
programmatically.
Other solutions: http://www.sonicvisualiser.org/
http://www.speech.kth.se/wavesurfer/
Victor
----- Original Message -----
From: "Ismael Valladolid Torres" <ivalladt(a)gmail.com>
To: <microsound(a)hyperreal.org>rg>; <microsound(a)microsound.org>rg>;
<linux-audio-user(a)lists.linuxaudio.org>rg>;
<linux-audio-dev(a)lists.linuxaudio.org>
Sent: Thursday, February 05, 2009 12:50 PM
Subject: [LAD] Request for open source solution to spectrograms and
phasemeasurement
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/
<ivalladt(a)gmail.com> http://www.seomarketingtools.org/
http://www.linuxav.net/
t. 0034912519850
m. 0034609884094 (Yoigo) GnuPG key: DE721AF4
Google Talk/Jabber/MSN Messenger: ivalladt(a)gmail.com
Jaiku/Twitter/Skype/Yahoo!: ivalladt
AIM/ICQ: 264472328
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9:50 a.m.
New subject: Request for open source solution to spectrograms and phase measurement
On Thu, 5 Feb 2009 13:50:32 +0100
Ismael Valladolid Torres <ivalladt(a)gmail.com> wrote:
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
jkmeter might be what he needs or part of the solution.
http://www.kokkinizita.net/linuxaudio/downloads/index.html
Afaik it is more or less meterbridge modified for K-scales (k-20 and
K-14).
Best regards,
Philipp
10:20 a.m.
New subject: [LAU] Request for open source solution to spectrograms and phase measurement
Ismael Valladolid Torres wrote:
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.
hmm. there is a k-20 meter by fons adriaensen called jkmeter. it
shouldn't be too hard to hack it to k-14.
as for a spectrogram in k-14, i wonder if that's even properly defined.
there are a number of very capable analysers out there(JAPA is the one i
use, sonic visualizer has some very good ones as well), but i doubt
anyone of them is tuned to k14 by default. then again, you can watch
your headroom on the meter and be ok...
as for phase plots, there is no solution i know of. most people who need
that kind of data are proficient with maths tools such as octave and/or
gnuplot and will calculate their own, but unfortunately there is no
phase response plotter for the rest of us.
hope that helps,
jörn
11:15 a.m.
New subject: [LAU] Request for open source solution to spectrograms and phase measurement
As an aside to this, I absolutely hate matlab and matlab-like
tools as far as programming is concerned. I always felt a bit
ashamed to say that I did not really know them and that I used C
instead to do all my stuff even prototyping, with a bit of
gnuplot to do plots (heard a lot of "you can't use C for that").
However, to my delight, I discovered scipy et al about a year ago,
and since then I am a happy person. I had been a Python convert
for a while, using it for all sorts of little tasks, but now I can do all
plots, prototyping, etc, very quickly and with programs that can be read and
enjoyed. Phase plots are no problem there. This is what I would
call something 'for the rest of us'.
Victor
===========================
as for phase plots, there is no solution i know of. most people who need
that kind of data are proficient with maths tools such as octave and/or
gnuplot and will calculate their own, but unfortunately there is no
phase response plotter for the rest of us.
hope that helps,
jörn
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4:23 p.m.
New subject: [LAU] Request for open source solution to spectrograms and phase measurement
On Thu, Feb 05, 2009 at 03:20:37PM +0100, Jörn Nettingsmeier wrote:
hmm. there is a k-20 meter by fons adriaensen called
jkmeter. it
shouldn't be too hard to hack it to k-14.
No hacking required, jkmeter -type k14 is all you need.
as for a spectrogram in k-14, i wonder if that's
even properly defined.
The whole K-meter concept makes sense only for
measuring the complete signal.
Ciao,
--
FA
Laboratorio di Acustica ed Elettroacustica
Parma, Italia
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6 comments
6 participants
participants (6)
-
Fons Adriaensen -
hollunder＠gmx.at -
Ismael Valladolid Torres -
Johannes Mario Ringheim -
Jörn Nettingsmeier -
victor