Dayton OmniMic Precision Measurement System - Page 3

MJ,

I did not get that catalog but thanks to you, that question is now answered.
I am over on PE's site reading through the thread on this to get some more info.

James

To an extent, if the mic is accurate and repeatable across the full spectrum range in which you intend to use it. However the ECM8000 has been shown to be down in dB and has high distortion in the LF/ULF range, and also rises and then falls of steeply in the HF/UHF range. In these cases a cal file can only do so much. I think many want to be able to measure accurately down to 10-15hz, which the ECM capsule lacks the ability to do.


Yes, the mics are reported to come with individual cal files. But I question whether the startup calibration/baseline adjustments will still need to be performed considering the software will still need to use the soundcard to send the test tones, and whether they have created an Automated mode. I was just thinking, unless the output is run directly into an amplifier, it will still leave a remaining outside control, the AVR volume. However a quick manual level adjustment there is a lot less than the current pre-amp procedure. Guess we'll have to wait and see.

Thanks for the info on the designer.


EDIT: had to take a call, in the meantime many have already commented and explained further. Thanks Mark for the additional info.

The ECM does measurements down below 10Hz well enough for many to create and posts plots. Mine is professionally calibrated from 5Hz to 20KHz, is it ultra accurate? I just have a file with numbers that used by measurements packages All it has to be is consistent for DIY purposes. If its off by 5dB all the time @8Hz then the correction in the cal file will work.

I do not see this being any worst or much better then the ECM8000 which is used successfully already.

There is a "Request Large Quantities Quote" link in the produce page...

Since most here would be there main customer base I would think they would be open to a group buy. Get it into the hands of the people who would talk it up and the free advertising alone would make up for any group buy discount.

I am in if we can do a good group buy price. I think 25% off if we can get 10+ buyers is fair, what do you guys think? I know it sounds like a lot but lets start high and see what happens.

PE shipping prices to Canada suck. It would be cool if they just used USPS like monoprice does.

Im coming to Canada Next Monday and then Jan 5th

I am a newbie to all of this. Why does the bass decay test only go down to 50hz? Do bass nodes exist below 50Hz.

"Sir is that one of those new calibrated microphones or were you short changed at birth?"

After a quick reading of the document I can see we need a companion "Idiots guide" that walks one through the process of using the system.

For example, the SPL measurement option has weighting and damping type choices to make but no notes on which you should use and why. While this is probably well known and I use to know which weighting was best, I've forgotten.

Perhaps someone can develop some YouTube videos on the use of the system for common tasks.

It says to key in the "6 character calibration code". How much calibration info can be contained in 6 characters?

Hello All,

I am in the uk and have just noticed this thread.I have an ADA cinema Rhapsody processor which has it's own PEQ built in software but doesn't have auto room set up, you have to put the results in taken from off another device( ie frequency,Q, etc.) I am just wondering if this could be used for that purpose, I had not come accross this unit until reading this thread.


Regards.............Alan

Yes you could.

site is blocked from my work computer; does it say how low in freq it measures?

the sample graph shows 10Hz

The way I read the description, you can either generate the test signals with the output of your soundcard OR use the CD that contains test signals if you don't have an easy connection available.

XLNT, thanks

Well you will still need 115v out in the parking lot to power the sub amp, either bring a cd player that has integrated volume control, or just play the test tones from your laptop using either the optical drive or mounting the disc image.

BTW I didn't see any reference to software generated tones either, however from skimming the manual it does not say/show what "Advanced Features" button unlocks/enables under the Frequency Response tab. Maybe it's in there.

Hey guys. I know many of you are interested in the software and there is a .pdf manual but some of you either can't access it or something like that. I took some screenies from tha .pdf manual for those interested. These are just the sample screenshots from the manual so this is all the content I can come up with. Should give you a pretty good idea of the functionality of the program though. Enjoy!


SPL meter


Frequency Response


Oscilloscope


Harmonic Distortion


Reverberation


Bass Decay (2 pics)




Yep. I want this.

Well you could use a 12vdc->115v power inverter so you can use the intended amplifier. As I said previously, you can use the laptop to play the CD and just use a 3.5mm mini-jack -> RCA converter. Obviously it would be easier if the software played the tones itself.