ARTA in the demo version does not allow the import of PIR files, but it is possible to save them. As someone wants to continue to use ARTA for measurements for VituixCAD, using the Spatial impulse response group record module ARTA will save PIR files even in the demo version. Thus, everything we need for simulation in VituixCAD is available in ARTA's demo package.
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Joined 2003
Possibly Ivo will take the same approach as when Basta and Sirp were retired and provide a public license key so anyone that wants to use the software can use it fully. Time will tell. But mV8 is right, if you simply follow the VituixCAD measurement guide for ARTA, you will have success even without a licensed installation.
You simply follow the VituixCAD tutorial, and ARTA in the demo version will save PIR files. If you want to save only one measurement, e.g. only for angle 0, you stop measuring the sequence after the program saves the first measurement for angle 0.
https://kimmosaunisto.net/Software/VituixCAD/VituixCAD_Measurement_ARTA.pdf
I was under the impression the PIR files could not be exported in the demo-version, but now I understand my assumption was wrong.
In the interest for the greater good I would only wish the developer would consider to publish the source code some time in the future, perhaps on GitHub or similar open source development platform, or in some other way keeping it alive, so that in can be kept maintained allowing for eventually existing bugs and errors to be corrected, as well as allowing for the ability keep developing and adding new features.
Other than that, the SW in its current state is, as far as I understand it, already offering the most important features one can wish from it even without a license key, so any eventual release of the license key is rather futile in itself.
Finally, a big Thank You from me as well to Mr Ivo for everything already offered to the diy audio community, enjoy your well deserved rest.
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I bought the license key although I never needed it really - just to honor the good work.
And so I think it was a good idea if Ivo would release his code as O.S.
And so I think it was a good idea if Ivo would release his code as O.S.
My ARTA Box uses the standard schematic found in the Application Note:
https://artalabs.hr/AppNotes/AN1-MeasuringBox-Ver2-Rev3Eng.pdf
The chassis and circuit is built by my very good friend, who’s a very competent and methodical diy builder. He added three point variable damping on input signal to protect sound card.
I know I have said this before, but it would be more useful to make ARTA open source. This would make it possible to maintain (and improve) it in the future.
Hi
I am still learning how to use ARTA and have a question. I hope experienced members still look here.
I would like to measure the distance offset of acoustic centers between mid and tweeter drivers mounted in a box using ARTA.
I am using a 2i2 with standard ARTA measurement box in two channel mode for time reference with an amplifier and emm6 mic
Is it valid to use the following method?
1) set mic at 1 meter in line with tweeter select impulse response use PN noise to measure tweeter connected to the amplifier via a 33 uf cap, measure impulse response, then select "max" to auto set the cursor at the tweeters impulse max.
Also select view - gate time (m @ 344m/s)
2) without moving the mic, move amplifier output to the midrange driver and repeat impulse test to see the mid-range impulse
3) now after zooming in right click mouse to set the marker at the midrange peak
4) read off the gate time/ distance between the tweeter set cursor and the mid peak marker.
will this be the correct offset distance between the Mid and tweeter.
I have attempted this and it certainly gives a result, just not sure it's correct. There may be a small trigonometry error at 1 meter, not sure that would matter.
It seems too easy compared with other methods
Any advice would be welcomed
Stephen
I am still learning how to use ARTA and have a question. I hope experienced members still look here.
I would like to measure the distance offset of acoustic centers between mid and tweeter drivers mounted in a box using ARTA.
I am using a 2i2 with standard ARTA measurement box in two channel mode for time reference with an amplifier and emm6 mic
Is it valid to use the following method?
1) set mic at 1 meter in line with tweeter select impulse response use PN noise to measure tweeter connected to the amplifier via a 33 uf cap, measure impulse response, then select "max" to auto set the cursor at the tweeters impulse max.
Also select view - gate time (m @ 344m/s)
2) without moving the mic, move amplifier output to the midrange driver and repeat impulse test to see the mid-range impulse
3) now after zooming in right click mouse to set the marker at the midrange peak
4) read off the gate time/ distance between the tweeter set cursor and the mid peak marker.
will this be the correct offset distance between the Mid and tweeter.
I have attempted this and it certainly gives a result, just not sure it's correct. There may be a small trigonometry error at 1 meter, not sure that would matter.
It seems too easy compared with other methods
Any advice would be welcomed
Stephen
For what purpose do you want to measure the acoustic center of the speakers?
I am not very familiar with ARTA, but I'd recommend using a "dual channel" measurement. One channel of the soundcard for the microphone, the other for a loopback measurement. If ARTA is clever (and it surely is), it will use the loopback data for time calibration, allowing consistent timing in your tweeter and midrange measurements.
AFAIK the UMIK does not allow a loopback measurement in parallel to the microphone. That will make it hard to get consistent timing between different measurements.
The op is describing a 2 channel setup with an emm6 mic.
Why i want to see a picture is that i have no clue how the drivers are positioned, how the mic is positioned, etc
Why i want to see a picture is that i have no clue how the drivers are positioned, how the mic is positioned, etc