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Old 25th December 2012, 04:35 PM   #151
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Location: Calcutta,India
Default ARTA in Windows8/32bit

Installed smoothly on Windows 8 . Did not get a chance to really run it.
Got a gut feeling it will run smoothly too.
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Old 18th December 2013, 07:21 PM   #152
ente is offline ente  Germany
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Location: NNW of Rome
ARTA version 1.8.0 is published (see download section).

New features are:

- ARTA has enhanced view of directivity pattern with new "filled contour plot"
- Reference angle for directivity normalization is now user defined
- ASIO driver recognized true 24 bit format of I/O transfer
- ASIO response has been improved
- Calibration procedure has selectable sampling rate: 44100 and 48000 Hz
- Added Phase intercept distortion in ARTA smoothed frequency response window
- Added overlay in ARTA Step response window
- ARTA saves number of averages in IR measurement setup
- Mic. freq. compensation accept only raising frequency points
- New Tool in ARTA: 1/3 octave SPL and loudness time record history
- LIMP has subtract from overlay command (good for removing influence cable resistance)
- LIMP has cable serial impedance compensation
- LIMP has new L3R lossy inductance model of loudspeaker voice coil impedance
- LIMP has better (nonlinear LSE) optimization of TSP estimation
- LIMP has ability to show several target curves,
- LIMP can generate special target curve by pressing F3 in main window - loudspeaker impedance calculated from TSP
- STEPS has corrected *.csv export
- STEPS has new type of measurement: Loudspeaker Maximum SPL vs. Distortion

On support page there are new tutorials for ARTA, STEPS and LIMP in german language.

Merry Xmas
Ivo & Heinrich
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Old 19th December 2013, 02:48 AM   #153
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Thank you brother for the wonderful news
God bless.
Merry Christmas to you.

Regards
Soundrex
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Old 23rd December 2013, 01:45 PM   #154
zega is offline zega  United States
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Aaah Hvala Ivo at al odlican poklon za moj rodjendan.
Looks like Birthday present (released on my birthday!)


Zega
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Old 24th December 2013, 06:18 AM   #155
epa is offline epa  Netherlands
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great program
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Old 24th December 2013, 12:23 PM   #156
Eldam is offline Eldam  France
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Thank you for the new release,

Happy Santa
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Old 24th December 2013, 04:23 PM   #157
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wonderfull!!!, thanks
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Old 15th February 2014, 08:24 AM   #158
epa is offline epa  Netherlands
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i have bild a measurement box,bild in amp and bild in usb audio interface.
but i'm getting a strange impedance reading.
there is no spike?
also there is some difference between pink noise and stepped sine,but this might be normal.
maybe its a setting?
any help is much apreciatedClick the image to open in full size.
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Old 15th February 2014, 09:09 AM   #159
Lojzek is offline Lojzek  Croatia
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Let us take one step at a time. Would you kindly say what were
you trying to measure, what driver, what box volume and similar
details. Are there any manufacturers TS parameters for your driver ?
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Old 15th February 2014, 09:10 AM   #160
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Location: Glasgow, UK
Quote:
Originally Posted by epa View Post
i have bild a measurement box,bild in amp and bild in usb audio interface.
but i'm getting a strange impedance reading.
there is no spike?
also there is some difference between pink noise and stepped sine,but this might be normal.
maybe its a setting?
any help is much apreciatedClick the image to open in full size.
What is the quoted Qts/Qes/Qms of the driver ? Those curves just look like a driver with a very low Qts.

As for why the stepped sine and noise readings show different curves with different resonance frequencies - that is not an error in the software or measurement, that is the centre frequency and Q of the drivers mechanical resonance changing with suspension excursion!

All drivers do this to some degree - some dramatically so. The pink noise mode causes less peak excursion for the same overall RMS level thus you get a different (usually higher) resonance frequency.

Welcome to the real world where thiele small parameters are not constant but vary depending on drive level.

Try reducing the drive level of the stepped sine mode and you will find a point where you get about the same response as the pink noise mode.
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Last edited by DBMandrake; 15th February 2014 at 09:22 AM.
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