SoundEasy V28 released - ANSI-CTA-2034 automatic measurements

[bohdan]

Hi Brendon,

Thank you for the IR file and the Mike Cal file.

The reason that Calibration SPL does not show on the MLS window, is because the Calibration file has been saved in old format of SoundEasy.

Early versions of SoundEasy would save the Calibration files at the same average SPL level as the Loudspeaker driver itself. Typically – around 90dB. Then, when importing such file into MLS/ESS systems, the 90dB would be automatically stripped.

I have been increasingly uncomfortable with this concept. Calibration file should correct small variations in the mike frequency response, so the correction values in the Calibration file should oscillate around 0dB. Later versions of SoundEasy implemented this concept, and the manual was progressively corrected to reflect this.

In the later SE versions, exporting Calibration file should be performed using “Export SPL/Phase At 0dB (Target/Text File)” option from the main menu. This will ensure, that the file has correct entries in it. You can verify this easily using any Windows text editor.

I see no issues with your IR file, except, that it was recorded at very low levels for both: Ref and Input channels.

Best Regards,
Bohdan

[augerpro]

Think I figured it out. Found the mic response to be at 180dB (attached). It's like v28 added another 90dB on top of the original 90 dB level of the cal file. This would of course push anything measured down 90dB - to near 0. Which is where my measured DUT response is.

[augerpro]

Mic cal file was processed at 90 in a previous version of SE. I didn't change anything from previous versions, just transferred the cal file over to v28 folder and loaded it. I did take the measurement IR with v23, and I'm wondering if that is the issue. Maybe with v28 new data in the file, it needs to be captured by v28? Do you have v28 and an older version with IR files you captured with that older version? How does your v28 behave?

[dcibel]

Just started using v28 and ran into an issue. When I click "show mic cal" it only showed the phase, no SPL. Then when I opened an IR for a woofer, and plotted it, again no SPL response. I adjusted the reference from 90 to 0, and found the SPL plotted there (see attached). I assume the mic cal response is now "hiding" somewhere but I couldn't find it. Any reason SE is behaving this way now? Also, is possible to toggle the plot descriptions? I like that they were added, but they really clog up the whole screen when you have a number of plots on it.

Remember that Soundeasy uses 90dB as it’s reference, which is different from all other software. A calibration file with 0dB reference needs to be processed through SE to adjust it to a 90dB reference using the import and export tools.

[augerpro]

Will do, thanks Bohdan

[bohdan]

Hi,

If its all the same to you, I would suggest to move your issue to the new SoundEasy User's group https://groups.io/g/Soundeasy


V28 has significantly increased driver file size due to the ANSI measurements. So, I need to see your driver, mike cal and IR data files.
Could you please email those to my email [email protected]

Best Regards,
Bohdan

[augerpro]

Also, every time I click the "post process" tab, then click back to "MLS", my window width has dropped by one????????

[augerpro]

Just started using v28 and ran into an issue. When I click "show mic cal" it only showed the phase, no SPL. Then when I opened an IR for a woofer, and plotted it, again no SPL response. I adjusted the reference from 90 to 0, and found the SPL plotted there (see attached). I assume the mic cal response is now "hiding" somewhere but I couldn't find it. Any reason SE is behaving this way now? Also, is possible to toggle the plot descriptions? I like that they were added, but they really clog up the whole screen when you have a number of plots on it.

[soongsc]

With this post, we are looking at a major change in the single and dual axis rig. The base expansion has been taken out replaced is a caster wheel design. This change is because we discovered readily available wheelchair caster wheels could fit the purpose quite nicely, simplified the design, while also keeping the total cost about the same. Below is our new single axis rig design with adjustable support.

[soongsc]

Here is another possible application where we are inserting a mic into the ear, and measure the response at the canal entry to simulate where an earbud sound source will be. Using a flat frequency response speaker, we can see how the head and ear may effect the response, and so when calibrating earbud response we can accomplish a more accurate presentation of sound.

[soongsc]

Some detail on the top.



The yellow circled parts will be changed to thinner stainless steel parts with countersunk bolts.
Also note the silicon strips used to prevent slipping of speaker.

[soongsc]

Here is the final design of the single axis rig. Notice a few things:
1. Added knobs for convenient adjustment.
2. Expanded base with roller ball feet for convenient moving around. (The whole unit is about 19Kg)
3. Wires pulling the expansion legs. This prevents the legs from moving around too much.

The PVC cap at the center of the table is not included, as it is for a different purpose which I will show in a later post.

[soongsc]

Just getting the final touches to the single axis rig. Should be finished by Tuesday. After posting the final version (minus a built in adjustable support), the second axis and fixtures start to go on. This is going to be a challenging part. Kind of figuring things out as we go along.

[JRT]

Also... In case anybody is looking for extruded aluminum structural materials, look at what is available at:
8020 dot net 

You can also find similar materials for sale elsewhere. 

This is not SPAM. I have no affiliation with them,  have no profit motive in this, and it does not directly compete with anything that PE has for sale.

[bohdan]

bohdan will you make the RS232 communications specification available, or are you making it exclusive for Soong's turntable?

Hi Shonver,

A number of ASCII commands are sent via RS232 link. The commands are specific for Cool Muscle motor. Some of the commands control motor state and settings, and other commands control motor movements. As you can imagine, the whole thing gets a bit complex, because the program controls everything: the MLS measurements, turntable movements and all post-processing of collected data.

George is planning to create dual-axis turntable device, and this would make things even more complex. This would allow to conduct balloon-style measurements, but the amount of data would be very large.
Anyway, we'll cross that bridge when we get there.

I hope I answered your question.

Best Regards,
Bohdan