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Dayton OmniMic Precision Measurement System - Page 12

post #331 of 2086
Thread Starter 
Just got the Fedex delivery....
Opened up the disc with the test tones....

This is all that is on the disc... Looks like those are some old test tones... 1994

post #332 of 2086
Warp,

Thanks for the info. I was hoping if anyone read what I posted they would shot me a PM.

James
post #333 of 2086
With a total file size of 4 kb, why didn't they just embed them in the program and make life even easier?

Quote:
Originally Posted by Warpdrv View Post
Just got the Fedex delivery....
Opened up the disc with the test tones....

This is all that is on the disc... Looks like those are some old test tones... 1994

post #334 of 2086
Thread Starter 
Agreed..... seems silly, but I would imagine they were trying to make it as dummy proof as possible for anyone....
post #335 of 2086
Embedding the tracks would make it more dummy proof - they wouldn't need to warn against using anything other than the proper track for freq resp.
post #336 of 2086
It's an AUDIO CD not a data CD, you can't look at the size using Windows explorer! Many MBs. It's to be played on a CD player....
post #337 of 2086
It looks like 10 Hz is the bottom frequency. Can anyone confirm this?

Bosso
post #338 of 2086
Quote:
Originally Posted by bwaslo View Post
It's an AUDIO CD not a data CD, you can't look at the size using Windows explorer! Many MBs. It's to be played on a CD player....
Thanks, good to know that they (or is that you?) didn't drop the ball on that one.
post #339 of 2086
Quote:
Originally Posted by noah katz View Post
Embedding the tracks would make it more dummy proof - they wouldn't need to warn against using anything other than the proper track for freq resp.
Doesn't that lead you back to the sound card and part of the difficulty with REW?
post #340 of 2086
Searched the thread and it seems that Bill is indeed the author.

Question for you, Bill:

I don't understand why there's a difference in the Bass Decay graph with the "adjust for response" option.

The decay is in dB relative to the original level, not in absolute Db SPL, right?

Also, can that graph be adjusted to go down to 10 Hz?
post #341 of 2086
Quote:
Originally Posted by t6902wf View Post
Doesn't that lead you back to the sound card and part of the difficulty with REW?
Dunno; doesn't playing a CD use the sound card too?
post #342 of 2086
Thread Starter 
Quote:
Originally Posted by bwaslo
It's an AUDIO CD not a data CD, you can't look at the size using Windows explorer! Many MBs. It's to be played on a CD player....
Bill thanks for stopping in here, seems we have the most comprehensive discussion about your new development. Appreciate you lending your time and support.

Kyle speaks highly of you and I'm truly glad you helped to develope something with much less hassle in setup for the layman. Look forward to using it.
post #343 of 2086
Thread Starter 
Quote:
Originally Posted by noah katz

Dunno; doesn't playing a CD use the sound card too?
I think it's designed to be played in a outboard DVD or cd player hooked up to the avr or preamplifier.
post #344 of 2086
Quote:
Originally Posted by Warpdrv View Post
I think it's designed to be played in a outboard DVD or cd player hooked up to the avr or preamplifier.
Right you are:

"If the title bar at the top specifies a CD track, insert the OmniMic Test Track CD into the disk player of your audio system and play the indicated track."
post #345 of 2086
Quote:
Originally Posted by noah katz View Post

Searched the thread and it seems that Bill is indeed the author.

Question for you, Bill:

I don't understand why there's a difference in the Bass Decay graph with the "adjust for response" option.

The decay is in dB relative to the original level, not in absolute Db SPL, right?

Also, can that graph be adjusted to go down to 10 Hz?

Hi Noah,

I can't answer a lot of questions (support is supposed to be through PE/DaytonAudio) but I can do a few. Most of the ones I've seen can be found in the Help file (or by just playing with the prog a little).

But the "adjust for response" thing is a little obscure. The decay is in units of time (milliseconds) needed for an initial level to decay by various dB amounts. "Adjust for Level" is a (somewhat empirical) way of including the actual response into the picture. For example, if you had 4000msec of decay time to decay by 5dB at 30Hz, but the frequency response were sunken down by a lot at 30Hz, then you probably don't care much about that decay time. If response were peaked there, though, big trouble.

The graph can be adjusted to display down to 10Hz, use the little yellow arrows below the lower graph. Data is only give for down to 12 Hz, though, if I remember right (don't have a mic here).
post #346 of 2086
Quote:
Originally Posted by Warpdrv View Post

I think it's designed to be played in a outboard DVD or cd player hooked up to the avr or preamplifier.

Thanks, Warpdrv.

You can also get the test tones (for freq response, CD tracks one and 2) directly from the sound card if you want to (with most computers). See the "Frequency Response - Advanced Mode" page in the Help files. Those signals are embedded into the program. Or you can just play the audio CD in the audio player.
post #347 of 2086
Bill, thanks for the explanation of Bass Decay.
post #348 of 2086
Does it let you save as .FRD files Parts Express Tech doesn't know yet and Dayton Tech didn't return my call.
Thanks
Mike
post #349 of 2086
Quote:
Originally Posted by noah katz View Post

I just assumed it was another free but twaeky tool that I wouldn't want to mess with.

Thanks, I'll look into it.

Does it run on Windows 7?

Not sure about Windows 7 but it runs on Vista, I have a quick and dirty HOW TO thread for getting HOLM up and running.
post #350 of 2086
Thread Starter 
Quote:
Originally Posted by mikey15 View Post

Does it let you save as .FRD files Parts Express Tech doesn't know yet and Dayton Tech didn't return my call.
Thanks
Mike

With my small amount of messing with it last night, It does allow to save as .frd.

I was not happy that this program doesn't allow a full screen view, only just a window, which is about 800x600.. You cannot maximize it. My laptop screen is almost double that size. What's up with that ?

It looks like they didn't spend slot of time on the GUI
post #351 of 2086
Agreed, that is a bit of a disappointment. That, however, is something that can be improved on with software updates. Having burned the test tracks to my PS3, I am loving how quickly I can be up and measuring. No additional SPL meter, no wires all over the place. I just have to find some time to actually use it for something productive.

To anyone who has had a chance to play around with this a bit, are any of the modes equivalent to the REW RTA mode? I loved that mode for moving my dual subs around the room and seeing the real time response.
post #352 of 2086
Mine came in today but I will have to set it up tomorrow once I find another laptop. The one I had hoped to use is pretty much dead right now.

What material are people using for the SPL/Spectrum section?

Thanks.

James
post #353 of 2086
Quote:
Originally Posted by Warpdrv View Post

With my small amount of messing with it last night, It does allow to save as .frd.

Confirmed in the online user's manual.

Unfortunately, the mic can't be used with other measurement packages. Technically, the manual says you can't access the calibration file, but its not real useful as a measurement mic without the correction file.

-Brent
post #354 of 2086
Quote:
Originally Posted by Warpdrv View Post

With my small amount of messing with it last night, It does allow to save as .frd.

I was not happy that this program doesn't allow a full screen view, only just a window, which is about 800x600.. You cannot maximize it. My laptop screen is almost double that size. What's up with that ?

It looks like they didn't spend slot of time on the GUI

Yes, the inability to maximize is a bummer.

I re-config'd my rez, temporarily, to enlarge it.
post #355 of 2086
Quote:
Originally Posted by riverwolf View Post

Unfortunately, the mic can't be used with other measurement packages. Technically, the manual says you can't access the calibration file, but its not real useful as a measurement mic without the correction file.

It isn't hard to create your own calibration file. You have the control already.
All you need to do is run a sweep with the mic & cal, and then run another sweep with the raw mic with another software package. Run multiple sweeps both ways, and then merge the two averages. A Cal file is born.

The trickier part could be getting the other software to accept a USB mic, over the normal soundcard inputs. I have never seen USB mic drivers, so I do not know how the system will handle them.
post #356 of 2086
The mic cal is likely a mic-specific sensitivity figure coded into the value you enter (required for the SPL meter which needs to know overall sensitivity) and a generic response cal file built into the software.

A USB mic looks just like any other soundcard but only has inputs. Should be useable with anything.
post #357 of 2086
Well, I might as well be the first to post a graph.

1/3 smoothing, quick manual calibration with Audyssey off.
LL
post #358 of 2086
Audyssey on, 1/6 smoothing.


Audyssey on and off 1/24 smoothing.
LL
LL
post #359 of 2086
Are you measuring in the same location(s) you had the Audyssey mike?

Because it would never give you a nice downsloping response like that (-10 dB from low freq to high).

And which version of Audyssey? It doesn't seem to be doing so great at smoothing the response except in the bass.

Do you have Audyssey Pro?

It'd be interesting to see how its graphs compare to OmniMic's.
post #360 of 2086
In the dual graph which color is Audyssey, blue? Not much amplitude correction there.
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