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Old 28th November 2005, 11:35 PM   #11
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looks good and I downloaded, but being the paranoid person that I am I haven't tried it out yet just a little concerning is the lack of information on the site, especially the fact that there is no mention of the type of licence etc.

I'm just security concious in the extreme, will probably run it up on a spare machine and run a registry and file system monitor to make me feel safe

Tony.
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Old 28th November 2005, 11:58 PM   #12
B4 is offline B4  Canada
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wintermute, I know what you mean. I scanned it with kaspersky and Pest Patrol and found nothing. I am only interested in the
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Old 29th November 2005, 12:00 AM   #13
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yeah I've scanned it with trojan hunter (trial version) spybot search and destroy, and Trend Micro pc-cillon 2005 antivirus and nothing reported any problems, but I'm still paranoid

Tony.
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Old 29th November 2005, 12:04 AM   #14
Vikash is offline Vikash  United Kingdom
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Quote:
Originally posted by B4
wintermute, I know what you mean. I scanned it with kaspersky and Pest Patrol and found nothing. I am only interested in the
I guess the virus got the rest of that sentence?
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Old 29th November 2005, 05:08 AM   #15
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Hello

Yesterday I did obtain some results with audio tester, but they were inconsistent each time I repeated the test, I tried to change latency, and reinstalled the driver many times, because I had the audio output disappearing after some runtime errors.

Also I tried to mute all the inputs, including the mic input, but had the same inconsistent bad results each time, also all results stated that all speakers I got have Rdc = 0 Just imagine that a subwoofer had Fs = 244Hz !! and Rdc = 0 instead of 4 Ohm. Also all results I got were very noisy, seems its time to change the sound card now but I will try different sampling rates first, to see if this helps.

I tried playing with Speaker Workshop too, it seems a good software in deed, but a little bit old with tree view, though it does the job very well, especially when used with JIG I or JIG II, also the whole system can be designed with it, including the crossover network, any way, I had very erronous results with it, as I have not clibrated yet, but seems good and less noisy than audio tester results.

There is a lot of info Here about JIG and setting up the sound card, thanks to bzdang.

BTW, the new software ARTA doesn't seem to be really relaible, as others said, it doesn't say any thing about privacy at least any way, I heard about some yahoo and hotmail hacks that are not dicovered by any protection software So I know what this looks like...but thanks for the new software in deed as I will try it any way

May be I have to stick with speaker workshop and audio tester may be for a while, as the first hasn't yielded any problems for me while working on it, at least, no runtime errors, after calibrating, I will see what this will do with it. With the later, I will try to avoid runtime errors too

Any way, I am not confused about any thing, cuz I am new to speaker measurements, I did many speaker enclosures, but I always wanted to do that the scientific way, thank you all my friends, bring it up I have to be really patient till I get it right.



PS. Hey wintermute, if I want to stick with Realtek built-in sound card on MSI Mboard, what kind of power amplifier should I use, also, is the protection scheme used by JIG II for the sound card input enough when an amplifier used to drive the speakers while doing the test, also you may want to posta schematic of your test bench too for JIG II.

Thanks
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Old 2nd December 2005, 07:41 AM   #16
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Hello

Finally I succeeded to make it, I used a software called Loudspeaker Parameters Measurement System "LPMS " from Massimiliano Camboni, the guy is very kind and of great help.

Massimiliano makes a small unit in order to connect it to the sound card, I received one yesterday and it worked perfectly on the on-board Realtek sound card after I activated the software, the unit it self is cheap and worth the try in deed, its a very good software also, and I have not confronted any runtime errors at all, like what happened with other softwares, also the repeated results were consistent, just a change of 0.01 in readings won't kill.

It supports added mass method, and also measures the RLC, and free air Impedance, just a great software, and I liked it a lot


Here are some shots...
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Old 2nd December 2005, 07:45 AM   #17
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Free air...
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Old 2nd December 2005, 07:49 AM   #18
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Clibration data...
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Old 3rd December 2005, 06:13 AM   #19
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Hi Metal,

Good to see you are now getting some decent results on the question about what amp (not that you probably need it now, I think I read your post before you added the PS ) any good quality amp should be fine, you are only driving it at low levels. I'm now using a gainclone for my acoustic measurements.

I can't remember exactly but I think the zenners on jig II limit the voltage to +- 5V which is probably ok for some cards, but may be too high for others... howerver if you are driving at low enough levels for T/S param testing you should never run a risk of overloading the sound card anyway. I just checked and the voltage I use for T/S param measurements is 200mV without load (and only 75mV with load) AC well below the 2V max of most sound cards!! (the drop to 75mV is because I'm running it directly off the soundcard line out).

I'm not sure what you meant about me posting the schema.... I just use the standard Jig II one.

Tony.
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Old 3rd December 2005, 11:21 AM   #20
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Hi wintermute

I was on a hurry in deed, when I emailed that LPMS guy, I did not expect him to reply, but he replied kindly and sent me a unit to use it with his software, and I posted the results of some speakers already. I was trying to make it work with other softwares, but seems I failed, as a matter of fact I still don't know why

I have not measured the output of the unit yet, but I will do later and see if they exceed/not +/- 5 Volts, any way, as long as the unit haven't blown my SC, this means its running in the SOA of the SC inputs.

Regarding the scema I asked you about, I thought you were using something else, other than the usual JIG II on the net, but now its clear to me you are using the standard JIG II, thanks alot for the guys in deed, as they were of great help to me. I always wanted to measure speakers parameters, and always thought its somekind of magic, till I did it finally.

I was experimenting with many softwares to design some enclosures now for some speakers, I tried WinISD, its very helpful to me, as soon as you save the new speaker parameters, you can do a lot of things, I tried to do that with speaker workshop, but seemed to me that I have to do more work, any way, both are very good, I will keep working with both softwares to see what I get, then I will be back to post some results

Thanks
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