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Old 28th January 2010, 08:55 AM   #21
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I have now a team of early adopters
Waiting for your feedbacks, I will now switch to other Apps.
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Old 19th February 2010, 04:28 AM   #22
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I would love to try your app and would be happy to provide feedback.
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Old 1st March 2010, 02:09 PM   #23
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I will post this week the latest versions (and the last I hope) of my audio related iPhone Apps:
> "Messon Speaker Meter": major update to come this week
> "Diapason Audio Generator": no update planned
> "SPLnFFT Noise Meter": a minor update is currently "under review". No further update planned

Thus this is the end of promotional codes. I thank you in advance those who received one for their feedbacks to come.
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Old 2nd March 2010, 04:07 AM   #24
domtw is offline domtw  France
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Salut Fabien!
Just tried to find your application on the App Store (french) from my iPod touch (2nd Gen.) and when I search "messon", "messon speaker meter" shows up in the list.
But if I select this proposition it returns a "No Matches" message. So I can't get it, I will try later with my home computer which is the one I use for synchronization...

The iPod touch (2nd G) comes with a mic on the headphone line. I have no idea about its. Maybe you do ?
Do you use some compensation files to flatten the mic FR ?
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Old 2nd March 2010, 10:00 AM   #25
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Quote:
Originally Posted by domtw View Post
Salut Fabien!
Just tried to find your application on the App Store (french) from my iPod touch (2nd Gen.) and when I search "messon", "messon speaker meter" shows up in the list.
But if I select this proposition it returns a "No Matches" message. So I can't get it, I will try later with my home computer which is the one I use for synchronization...

The iPod touch (2nd G) comes with a mic on the headphone line. I have no idea about its. Maybe you do ?
Do you use some compensation files to flatten the mic FR ?
Hello,

Indeed it is called now "Messon Speaker Meter", so that the purpose of this App becomes more obvious at first sight.

From 2nd generation of iPod touch you can use an external microphone, the one provided with the headset. I have not tried it myself
as I do not own an iPod touch but this is the way I expect it to work.

I do not use compensation files so far.
There are a lot of information from this site:
iPod Touch 3G Headset IO Frequency Response Faber Acoustical Blog
iPod Touch 3G Headset IO Frequency Response Faber Acoustical Blog
...
My conclusion is that the external microphone should be prefered to internal
microphone. And that some special dock should give even better results.
For the time being, if you want to apply compensation, the best option
is to use the "mail" feature and copy-paste results in excel. Then you can
apply whatever compensation you want.
I may have a look nevertheless to the possibility to include compensation files. Yet I put priority on the improvement of methods. This week a new
release (v1.2) will come that improves significantly the response to white noise.
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Old 3rd March 2010, 11:38 AM   #26
domtw is offline domtw  France
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I know now why I could just see it in the proposed list after typing "Messon" in the search field of my iPod but not select it, preview it and buy it.

I bought it from the itunes store on my PC and when I wanted to synchronize it said that the application is not compatible with this iPod (2nd Gen.)
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Old 3rd March 2010, 12:07 PM   #27
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Quote:
Originally Posted by domtw View Post
I know now why I could just see it in the proposed list after typing "Messon" in the search field of my iPod but not select it, preview it and buy it.

I bought it from the itunes store on my PC and when I wanted to synchronize it said that the application is not compatible with this iPod (2nd Gen.)
I think this is probably a question of OS: please connect your device and check you OS version in iTunes (click on your device in iTunes).
The App was compiled with latest OS version which is 3.1.3. Just to propose latest one hopping this is the more stable one.
There might be something specific with iPod and not iPhone: the firmware update might not be free. But I do not know much about iPod. Maybe it is just for very first versions of iPod touch.

There is no hardware compatibility issue: with latest SDK, you enter hardware limitations and you do not choose any more which devices you claim the App is compatible with. I entered: "microphone" and Apple selects automatically compatible devices.
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Old 3rd March 2010, 01:17 PM   #28
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Hi, I have been eying the Studio Six Digital iPhone app measurement tools, but the price has been a factor, or buying a test mic and phantom power supply, your apps seem good, and with a low/reasonable price.


I simply wish to take accurate measurements of my speakers. Is the mic in the iPhone accurate enough, from listening position and right up against the driver?

Can the graphs from all the apps be saved to the iPhone or a computer?

What is the lower and upper limits of this, would love to know if my 1-30Khz compression drivers are hitting those levels as i'm sure my ears are not.

Many thanks in advance.
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Old 3rd March 2010, 03:06 PM   #29
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Quote:
Originally Posted by Studio Au View Post
Hi, I have been eying the Studio Six Digital iPhone app measurement tools, but the price has been a factor, or buying a test mic and phantom power supply, your apps seem good, and with a low/reasonable price.


I simply wish to take accurate measurements of my speakers. Is the mic in the iPhone accurate enough, from listening position and right up against the driver?

Can the graphs from all the apps be saved to the iPhone or a computer?

What is the lower and upper limits of this, would love to know if my 1-30Khz compression drivers are hitting those levels as i'm sure my ears are not.

Many thanks in advance.
There are two "professional" sellers for such applications: Studio Six Digital and FaberAcoustical. And then there is me
I appreciate the work FaberAcoustical does with measurement of hardware: see the blog part, for example: iPhone Microphone Frequency Response Comparison Faber Acoustical Blog
Some facts:
* hardware is limited regarding sampling frequency. I am using 44100Hz; 48000 might be use-able I think which means that upper use-able frequency is between 22.5 and 24kHz (supposing hypothetical perfect analog filters at the input). In practical, you will not get higher than 20kHz
* embedded microphone is not very linear. The microphone on the provided headset is much better. Still better: a dock with audio input like Belkin TuneTalk + an external microphone + pre-amplifier ... There are even more sophisticated docks but at a cost !
Whatever your choice, you will be limited in practical to maximum 20kHz.
Then you can think of applying compensation files (one of the two sellers I quote claims they do) but there will be no miracle below 100Hz: when there is no signal, just noise to amplify, you cannot do a lot of things to compensate.

If you really want to measure the band between 20 and 30kHz then forget the iPhone. Even a very accurate though affordable microphone like Behringer ECM8000 is not rated to upper than 20kHz.

An iPhone will be a rather good sound generator, and a rather limited soundmeter. Instead of putting much money in an iPhone App, you should
better consider buying an audio Application for the Mac then a good external
microphone+pre-amp (like the Behringer I quote).

If you want a first overview at a very low price, then there is my App with preferably the microphone from the headset. After all, if you decide to
invest in microphone+pre-amp later, the 4$ for this App will be rapidly
forgotten.
Regarding export of measured values, the "mail" feature makes it possible to send a mail with values to yourself. Then a copy-paste in excel and you
create there the graphs you want.

You could also buy a sound generator only (like my "Diapason Audio Generator") and buy a true hardware soundmeter. But this has a cost:
affordable ones are limited to 8kHz and with imposed weightings. But this
will not help you to measure up to 30kHz.

Take care to be up-to-date regarding OS version prior buying any App !

Hope this helps.
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Old 3rd March 2010, 05:09 PM   #30
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Thank you for the quick and honest reply. I shall buy it and see, I wasn't expecting much above 20Khz.

It would be a good stop gap between getting some more professional gear, the Behringer etc. And hopefully I can tell where my designs are failing.

Thanks.
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