12 Mar
2010
12 Mar
'10
2:26 a.m.
Hi!
I have an audio file (say, ~10 seconds) and want to see detailed spectrum at
wide range (say, from 10Hz up to Fs/2). There is excellent FA's jaaa analyzer
(and I use it at constant base), but it has linear freq axis, while log scale
is more appropriate at the case. Off-line (not real-time) analysis (with as
well as possible quality) would be appropriate.
Suggestions?
Andrew
12 Mar
12 Mar
4:45 a.m.
On Fri, 12 Mar 2010, Andrew Gaydenko wrote:
I have an audio file (say, ~10 seconds) and want to
see detailed spectrum at
wide range (say, from 10Hz up to Fs/2). There is excellent FA's jaaa analyzer
(and I use it at constant base), but it has linear freq axis, while log scale
is more appropriate at the case. Off-line (not real-time) analysis (with as
well as possible quality) would be appropriate.
Suggestions?
Have you tried Audacity? Choose Analyze->Plot Spectrum and you probably
get all the options you need.
--
Raine M. Ekman ...... raine(a)iki.fi
the Radio Project ... http://www.mikseri.net/artists/?id=36109&displ_lang=en
6:32 a.m.
On Friday 12 March 2010 11:45:22 Raine M. Ekman wrote:
Have you tried Audacity? Choose Analyze->Plot
Spectrum and you probably
get all the options you need.
It isn't detaild sufficiently. Say, if I have a signal with 10 tones at -20db
level (in 20Hz - 20KHz range), I'd want to see 10 appropriate peaks at -20db
with almost -inf db between (and harmonics and intermodulations at case this
signal is was going and recorded through some hardware - all chain must work
at 192K).
On Friday 12 March 2010 11:49:26 Arnold Krille wrote:
Replace jaaa with japa in your work-flow.
Same author, same quality, more features and logarithmic frequency scaling.
And inbuilt white and pink noise generator...
It's limited in freq and scale (db) ranges.
On Friday 12 March 2010 12:36:11 Andres Cabrera wrote:
Since you have an audio file, Sonic Visualizer is
ideal for this:
http://www.sonicvisualiser.org/
Still can not realize how to install it on Kubuntu 9.10. Any PPA? Or will try
to compile manually (as well as vamp SDK 2.0).
Andrew
6:39 a.m.
On Fri, Mar 12, 2010 at 10:32 AM, Andrew Gaydenko <a(a)gaydenko.com> wrote:
On Friday 12 March 2010 12:36:11 Andres Cabrera
wrote:
http://vamp-plugins.org/forum/index.php/topic,145.0.html
I haven't tested it myself. I really ought to update the "official"
build for newer ubunti...
Chris
Since you have an audio file, Sonic Visualizer is
ideal for this:
http://www.sonicvisualiser.org/
Still can not realize how to install it on Kubuntu 9.10. Any PPA? 
8:25 a.m.
On Fri, Mar 12, 2010 at 01:32:19PM +0300, Andrew Gaydenko wrote:
On Friday 12 March 2010 11:45:22 Raine M. Ekman
wrote:
Do you want a logarithmic *scale* or a logarithmic *analyser* ?
In other words what exactly are you trying to do ?
Have you tried Audacity? Choose Analyze->Plot
Spectrum and you probably
get all the options you need.
It isn't detaild sufficiently. Say, if I have a signal with 10 tones at -20db
level (in 20Hz - 20KHz range), I'd want to see 10 appropriate peaks at -20db
with almost -inf db between (and harmonics and intermodulations at case this
signal is was going and recorded through some hardware - all chain must work
at 192K). On Friday 12 March 2010 11:49:26 Arnold Krille wrote:
Frequency range is limited to 20 kHz, it's meant to be
a perceptual analyser. Amplitude range in the display
is 80 dB and you can add gain.
How accurately you can measure certain things (or if
they will be visible at all) depends on the analyser
bandwidth and the levell of its sidelobes. For Jaaa
the BW is constant over the F range, and all sidelobes
are below -80 dB (and decreasing as you move away from
the center frequency). For Japa BW is function of F and
sidelobes are below -40 dB.
Ciao,
--
FA
O tu, che porte, correndo si ?
E guerra e morte !
Replace jaaa with japa in your work-flow.
Same author, same quality, more features and logarithmic frequency scaling.
And inbuilt white and pink noise generator...
It's limited in freq and scale (db) ranges.
8:42 a.m.
On Friday 12 March 2010 15:20:33 fons(a)kokkinizita.net wrote:
Do you want a logarithmic *scale* or a logarithmic
*analyser* ?
In other words what exactly are you trying to do ?
How accurately you can measure certain things (or if
they will be visible at all) depends on the analyser
bandwidth and the levell of its sidelobes. For Jaaa
the BW is constant over the F range, and all sidelobes
are below -80 dB (and decreasing as you move away from
the center frequency). For Japa BW is function of F and
sidelobes are below -40 dB.
The idea (under discussing at some of russian DIY audio forum) is to use
multitone signal, compare it before and after audio amplifier and (having such
*multiple* results for *different* amplifiers) to try get some - at least
partially useful - correlation between results and subjective audio
perceptions (in particular, "clearance" - don't know an appropriate English
term; it's about how easy different instruments can be "separated" in
brain).
I'm not sure it is a right way, but would like to take participation in the
experiment (especially with my last SE-invention :-)).
Fellows (using appropriate software analyzers under MS win) show very clear
spectrum plots for original multitone signal (ten -20db tones in 20Hz - 20KHz
range). Having single-boot Linux, I'd want to get something the same :-)
Andrew
1:12 p.m.
On Fri, Mar 12, 2010 at 03:42:27PM +0300, Andrew Gaydenko wrote:
The idea (under discussing at some of russian DIY
audio forum) is to use
multitone signal, compare it before and after audio amplifier and (having such
*multiple* results for *different* amplifiers) to try get some - at least
partially useful - correlation between results and subjective audio
perceptions (in particular, "clearance" - don't know an appropriate English
term; it's about how easy different instruments can be "separated" in
brain).
I'm not sure it is a right way, but would like to take participation in the
experiment (especially with my last SE-invention :-)).
Fellows (using appropriate software analyzers under MS win) show very clear
spectrum plots for original multitone signal (ten -20db tones in 20Hz - 20KHz
range). Having single-boot Linux, I'd want to get something the same :-)
What are the frequencies (in particular the lowest ones) ?
Ciao,
--
FA
O tu, che porte, correndo si ?
E guerra e morte !
1:37 p.m.
On Friday 12 March 2010 20:08:02 fons(a)kokkinizita.net wrote:
On Fri, Mar 12, 2010 at 03:42:27PM +0300, Andrew
Gaydenko wrote:
Just now that forum is under hosting changing process, so in hands I have
multitone example wav file only. Sonic-visualiser shows approximately:
20 43 93 200 430 930 2K 4K9 9K3 20K
20, 200, 2K and 20K are exact values (I just remeber them :-)).
Andrew
The idea (under discussing at some of russian DIY
audio forum) is to use
multitone signal, compare it before and after audio amplifier and (having
such *multiple* results for *different* amplifiers) to try get some - at
least partially useful - correlation between results and subjective
audio perceptions (in particular, "clearance" - don't know an
appropriate English term; it's about how easy different instruments can
be "separated" in brain).
I'm not sure it is a right way, but would like to take participation in
the experiment (especially with my last SE-invention :-)).
Fellows (using appropriate software analyzers under MS win) show very
clear spectrum plots for original multitone signal (ten -20db tones in
20Hz - 20KHz range). Having single-boot Linux, I'd want to get something
the same :-)
What are the frequencies (in particular the lowest ones) ?
Ciao, 
4:49 a.m.
Hi,
On Friday 12 March 2010 07:26:50 Andrew Gaydenko wrote:
I have an audio file (say, ~10 seconds) and want to
see detailed spectrum
at wide range (say, from 10Hz up to Fs/2). There is excellent FA's jaaa
analyzer (and I use it at constant base), but it has linear freq axis,
while log scale is more appropriate at the case. Off-line (not real-time)
analysis (with as well as possible quality) would be appropriate.
Replace jaaa with japa in your work-flow.
Same author, same quality, more features and logarithmic frequency scaling.
And inbuilt white and pink noise generator...
Have fun,
Arnold
5:36 a.m.
Hi,
Since you have an audio file, Sonic Visualizer is ideal for this:
http://www.sonicvisualiser.org/
Cheers,
Andrés
On Fri, Mar 12, 2010 at 6:26 AM, Andrew Gaydenko <a(a)gaydenko.com> wrote:
Hi!
I have an audio file (say, ~10 seconds) and want to see detailed spectrum at
wide range (say, from 10Hz up to Fs/2). There is excellent FA's jaaa analyzer
(and I use it at constant base), but it has linear freq axis, while log scale
is more appropriate at the case. Off-line (not real-time) analysis (with as
well as possible quality) would be appropriate.
Suggestions?
Andrew
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-dev
--
Andrés
5365
days inactive
5365
days old
linux-audio-dev@lists.linuxaudio.org
9 comments
6 participants
participants (6)
-
Andres Cabrera -
Andrew Gaydenko -
Arnold Krille -
Chris Cannam -
fons＠kokkinizita.net -
Raine M. Ekman