or Connect
AVS › AVS Forum › Audio › DIY Speakers and Subs › Dayton OmniMic Precision Measurement System
New Posts  All Forums:Forum Nav:

Dayton OmniMic Precision Measurement System - Page 59

post #1741 of 2086
Quote:
Originally Posted by Stereodude View Post

I did read this whole thread this morning and it seems pretty much everyone is using the OmniMic to measure the response of their HT systems in room, mostly subs. However, I don't see any reports of people using it to measure drivers / speakers for crossover design. I'm in the midst of building a set of active speakers with a DSP on the 2 channel amp module. Is the OmniMic a good tool for measuring the driver's and speakers response and getting it all dialed in?

Yes, all the evidence I've seen tells me OmniMic is fine for such use.


Bwaslo, above, knows a thing or two about using OmniMic for loudspeaker optimization wink.gif

One afternoon two or three months ago, I spent a few hours at his home both visiting and listening to the diy Synergy/Unity in his profile pic. If what I heard that afternoon is any small indication of what's achievable with OmniMic and loudspeaker optimizing, etc., I'd say it's quite well suited.

Implementing the most modest of drivers, in a Tom Danley type Synergy/Unity build (all acoustic sources sum point source style), this thing sounded very nice. When I say modest drivers, I mean it. (4)$2, 2" mid drivers, (4)$9, 6" LF drivers, and a $40 compression HF drive. Yeah, this is a bit OT, but sure, the OmniMic software could be used for a variety of applications. A the great thing is it's being upgraded significantly since it was first brought to market, and it certainly wasn't half baked when I first got it upon it's release.

Again, those Synergy/Unity diy speakers of bwaslo's are mega over-achievers. Huge sweet spot,...I spent essentially the entire listening session way off axis of the L&R center-line. All types of material, and everything had a very nice natural ease and smoothness, yet all the apparent clarity was there. I don't know what to attribute the characteristics to, but the end result was quite nice. No head-in-a-vise stuff there, quite the opposite. Yeah, ....four, $9 LF drivers per side. Well executed is quite the under-statement. I'm sure OmniMic played a part in this execution.


Thanks
post #1742 of 2086
Quote:
Originally Posted by Stereodude View Post

I did read this whole thread this morning and it seems pretty much everyone is using the OmniMic to measure the response of their HT systems in room, mostly subs. However, I don't see any reports of people using it to measure drivers / speakers for crossover design. I'm in the midst of building a set of active speakers with a DSP on the 2 channel amp module. Is the OmniMic a good tool for measuring the driver's and speakers response and getting it all dialed in?

Absolutely! Omnimic is a fantastic tool for speaker development.
Lots of people on the "Tech Talk" forum (Parts Express) use the Omnimic data to design crossovers.
post #1743 of 2086
Hi,

I recently bought the Omnimic V2 from Parts express. I downloaded the calibration file from their website but unfortunately it's not possible to load the file. everytime I try, Omnimic says: "omm file load error"!

anybody ever had this problem?


Regards
post #1744 of 2086
Quote:
Originally Posted by Riddick View Post

Hi,
I recently bought the Omnimic V2 from Parts express. I downloaded the calibration file from their website but unfortunately it's not possible to load the file. everytime I try, Omnimic says: "omm file load error"!
anybody ever had this problem?
Regards


Would pay to contact Parts Express.

Did you import the omni file with V2 box ticked? Just a thought.
post #1745 of 2086
Hi has anyone time aligned a main speaker with there sub?

Please can you advise.

I am running dual stereo subs, Velodyne DD.

Thank you in advance
post #1746 of 2086
Phillips

Does your preamp/receiver have dual subwoofer outs or maybe a better question is how do you have the subwoofers connected?
post #1747 of 2086
Quote:
Originally Posted by JimP View Post

Phillips
Does your preamp/receiver have dual subwoofer outs or maybe a better question is how do you have the subwoofers connected?

Hi JimP thanks for your reply.

I have them connected to a Yamaha z9 that has stereo outputs.

Also the Yamaha has distance setting, level, phase for each sub output.

I tried the impulse way but couldn't see the subs peak, as illustrated in the manual.

Thanks again
post #1748 of 2086


Bill, could the vertical divisions be 5 instead of 6?

As it is, each vertice represents 1.655 ms. 2 ms divisions would be much easier to work with.

Thanks.
post #1749 of 2086
What is new in Version 4 Software from Omnimic.
post #1750 of 2086
Quote:
Originally Posted by KE_Houston View Post

What is new in Version 4 Software from Omnimic.

See post 1700
post #1751 of 2086
Jim, Thank You. Timing couldn't have been better, my miniDSP is on the way from Honk Kong. Has any one used it for auto / manual correction?
post #1752 of 2086
Quote:
Originally Posted by bwaslo View Post

Pre-official-download of the new version of Omnimic software. I'll be doing a short talk on this at the MWAF next Saturday.
http://www.libinst.com/Omnimic/OmniMicInstall.exe
--
Features in this version:
  • Automatic (or manual) equalization parameter export to MiniDSP, can work on average responses at multiple seating positions.
  • Built-in Z-Axis offset calculator for determining depth differences between tweeters and midranges, allows accurate crossover design.
  • text notes can be added onto Snapshot files for publishing online
  • Speech Transmission Index (STI) and RASTI calculated in the Energy Time Curve display.
  • Dual tone sine/square wave generator for computer soundcard
  • Zooming, smoothing, and multiple curves in the ETC plot.
  • Can download microphone calibration files directly from the web.
  • Longer time lengths supported in waterfalls and Wavelet spectrograms for room analysis
  • 690msec WAV file export for impulse responses
  • Phase display in Added Curves
  • Easy curve splicing (such as joining tweeter and woofer curves) for display
  • New math function for main curve: vector sum with data from saved FRD files, with delay adjustment
  • Compatible with V1 or V2 hardware

Hi Bill,

Was your presentation at MWAF recorded? Can you share the link or video with the gang.. and have a presentation for us, that is even better smile.gif
post #1753 of 2086
Bill,

Any news on the 5.1 channel DVD? I know you've asked opinions on making it a blu-ray. Frankly, unless there is some sonic advantage to doing a blu-ray over DVD, I'd stay with DVD. Everyone can play a DVD while I know many folks who still don't have a blu-ray player. IMO you'd get more universal acceptance going DVD versus blu-ray. Now if you want to produce both I myself would likely get the blu-ray but again, some folks just couldn't use it.
post #1754 of 2086
Quote:
Originally Posted by IceTBC View Post

Bill,
Any news on the 5.1 channel DVD? I know you've asked opinions on making it a blu-ray. Frankly, unless there is some sonic advantage to doing a blu-ray over DVD, I'd stay with DVD. Everyone can play a DVD while I know many folks who still don't have a blu-ray player. IMO you'd get more universal acceptance going DVD versus blu-ray. Now if you want to produce both I myself would likely get the blu-ray but again, some folks just couldn't use it.

As per a previous post:
Quote:
Originally Posted by bwaslo View Post

DVD doesn't support 7.1

He also said something about being able to direct signals to individual test speakers in either 5.1 or 7.1. That would be useful for post-calibration assessment of room correction software (e.g. Audyssey XT32), such as comparing the response of L+R or subs to L+R+subs in the crossover region.
post #1755 of 2086
Quote:
Originally Posted by sdrucker View Post

He also said something about being able to direct signals to individual test speakers in either 5.1 or 7.1. That would be useful for post-calibration assessment of room correction software (e.g. Audyssey XT32), such as comparing the response of L+R or subs to L+R+subs in the crossover region.

Absolutely! Sending separate signals to individual speakers would, IMO, be the best use of 5.1/7.1 support for those of us using OmniMic as an aid for setting up EQ in our listening rooms. If this wasn't supported it would really limit the usefulness.
post #1756 of 2086
Quote:
Originally Posted by IceTBC View Post

Frankly, unless there is some sonic advantage to doing a blu-ray over DVD, I'd stay with DVD. Everyone can play a DVD while I know many folks who still don't have a blu-ray player.

I'd much rather have 7.1, and I'm skeptical that someone who paid hundreds for OM can't scrape together $50 for a used BD player.
post #1757 of 2086
So a couple questions...

I just got my OmniMic V2 in the mail. It didn't come with a software or test tone disc (I did download both though). I also am unable to download the calibration file because when I put my serial number in it says "file not found". I called Parts Express and all they said was, "I am not sure why it's not there". That was the extent of the help.

Sucks getting a new toy in and having nothing to work with.
post #1758 of 2086
Quote:
Originally Posted by kaotikr1 View Post

So a couple questions...
I just got my OmniMic V2 in the mail. It didn't come with a software or test tone disc (I did download both though). I also am unable to download the calibration file because when I put my serial number in it says "file not found". I called Parts Express and all they said was, "I am not sure why it's not there". That was the extent of the help.
Sucks getting a new toy in and having nothing to work with.

Are you using the most recent software (with the http://www.libinst.com/Omnimic/OmniMicInstall.exe link)? Supposedly the newest release allows downloadable calibration files.
post #1759 of 2086
Quote:
Originally Posted by sdrucker View Post

Are you using the most recent software (with the http://www.libinst.com/Omnimic/OmniMicInstall.exe link)? Supposedly the newest release allows downloadable calibration files.

I am using the most recent and I did try to download the calibration files but the file isn't found, for fun I tried a random serial number and it found the file and downloaded it. So I know that is working, now I just need my calibration file. I used it next to a Radioshack meter which I know isn't very accurate but the OmniMic was 20db quieter....so I know it's not going to be worth it to try and even use it.
post #1760 of 2086
Quote:
Originally Posted by kaotikr1 View Post

So a couple questions...
I just got my OmniMic V2 in the mail. It didn't come with a software or test tone disc (I did download both though). I also am unable to download the calibration file because when I put my serial number in it says "file not found". I called Parts Express and all they said was, "I am not sure why it's not there". That was the extent of the help.
Sucks getting a new toy in and having nothing to work with.

Where did you get yours?
post #1761 of 2086
Quote:
Originally Posted by JimP View Post

Where did you get yours?

Parts Express website... was that a mistake?
post #1762 of 2086
Quote:
Originally Posted by kaotikr1 View Post

Parts Express website... was that a mistake?

no, email them
post #1763 of 2086
Quote:
Originally Posted by kaotikr1 View Post

Parts Express website... was that a mistake?


That's where I got mine and I didn't have any problems.

May just be a one off proble.

As someone else said, first contact Part Express.
post #1764 of 2086
Thats where I got mine also, and I got a mic, a mic case, a mini tripod a full sized tripod, and the latest software which set up the cal file fine.
post #1765 of 2086
I got my Omnimic just two days after ordering, pretty good for free shipping. First impressions, it came in a very large box. Contained in the box was the "free" mic stand and the Omnimic box. The mic stand was heavy and my first thought was "it's quality, not like I expected." The Omnimic was contained in a plastic box, lined with foam, along with the two cd's, a mic clip, and a mini tripod. All was in good shape except for the mic stand which has a defective "tightener" on the boom that won't tighten down enough to prevent the boom from sliding. So my expectation that the mic stand would be cheap was validated. I've been playing with the real time analyzer / spl spectrum function but haven't run any test tones yet.
Edited by Theresa - 11/15/12 at 10:24am
post #1766 of 2086


My first frequency response sweep. Much better than I expected. The drivers are in phase with each other. Next I need do a separate one for the subs.
post #1767 of 2086
Omnimic is proving to be easier than I expected.
post #1768 of 2086
While running sweeps the other night, I noticed when I had the test disc and the avr set to pLiix, it only ran the sweeps through the center channel and then the subs! Was that supposed to happen?
post #1769 of 2086
Any mono signal will be played through the center channel when using DPLIIx, so yes this would be normal.
post #1770 of 2086
so I would assume always EQing in stereo is the best way to do it? Then adjusting to aud, dyn eq etc. while still in stereo?
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: DIY Speakers and Subs
AVS › AVS Forum › Audio › DIY Speakers and Subs › Dayton OmniMic Precision Measurement System