[EA Support]

EA Support

2 December 2021 at 9:11 am #369

Hi santodx5.

It sounds like you might be measuring either the XTA outputs or the XTA + LF driver on its own, and not the whole speaker.

The loudspeaker’s overall response is a combination of both the processor, the loudspeaker driver characteristics and their relative physical position in the cabinet (w.r.t. delay/phase). So to flatten the phase of a loudspeaker, you need to measure the loudspeaker itself with all processing enabled.

(If you try to measure and correct the individual XTA outputs, you’ll be undoing the processing – particularly the crossovers – that is/are necessary to align the drivers. Also the loudspeaker dispersion, through the crossover frequency range, is controlled by the existing processing, and so if you change individual driver processing, you’re potentially changing the dispersion characteristics of the cabinet.)

When you have a measurement you’re happy with, take look at

FIR Filter Design for Loudspeaker Equalization

and the “FIR Designer 3 | Overview” video at

FIR Filter Design Tutorials

(The video also discusses the filter delay. Maybe also take a look at https://eclipseaudio.com/fir-filter-guide/.)

Linearising a loudspeaker (in mag, phase or both) from a single measurement can be problematic. Whilst the phase might be what you want at that particular measurement point in space, the phase response in other directions could be very different. Generally this kind of thing should be done by taking measurements at many different angles (within the loudspeaker coverage pattern) and averaging the measurements (and preferably all in a clean measurement environment or anechoic chamber). FIR Designer includes a measurement average function – see the Overview video mentioned above.

Most of what we’re discussing here goes beyond the scope of how to use our software and relates more to the fundamentals of loudspeakers. These forums are mostly for how to use our software but we’ll help where we can.

Regards,
EA Support

[EA Support]

EA Support

2 November 2021 at 7:46 pm #366

That’s it. 🙂
Glad you found it.

[EA Support]

EA Support

28 October 2021 at 6:28 am #361

The problem is the 1st line starting with a number. If the line starts with a letter or the line is removed, the file loads fine.

Kind regards,
EA Support

[EA Support]

EA Support

28 October 2021 at 6:12 am #359

Hi DomDomm,

Take a look at the various file format options on

Loudspeaker Measurement Import File Formats

If this page doesn’t help, please email us the file at info@eclipseaudio.com.

Note: SMAART recently changed their TRF file format to support MTW+. We only recently released updates for this so if TRF files are the problem and you use MTW+, check for FIR Designer updates. Alternatively, in SMAART change from MTW+ to MTW before taking the measurement.

Kind regards,
EA Support

[EA Support]

EA Support

19 September 2021 at 9:01 am #354

Hi hulkss,

We haven’t yet implemented the system step response but yes, it would be good to see. It’s on the TODO list. As an alternative, the “Wavelet Transform” view shows the combined system behaviour and gives a sense of the overall temporal response.

Best regards,
EA Support

• This reply was modified 5 years ago by EA Support.

[EA Support]

EA Support

14 September 2021 at 9:25 am #351

Sounds good. The Help in FIR Designer M is quite lean and focusses mostly on UI controls and their effects.

I’d suggest starting with the tutorials and videos on https://eclipseaudio.com/fir-filter-design-tutorial/

Best,
EA Support

[EA Support]

EA Support

14 September 2021 at 8:09 am #348

FDW is REW’s equivalent of SMAART’s FTW and SysTune’s TFC.

Whether or not to use it is completely up to you, and is based on your measurement environment and preferred workflow.

FDW, FTW and TFC are intended for situations where there might be strong mid and/or high frequency room reflections (which we’d like to remove from the TF with a window) and where shortening a traditional window (to remove these reflections) would cause loss of resolution in the LF. The frequency varying window provides for a longer window length at LF and shorter window length at HF. In a lab environment or anechoic chamber where reflections are minimal, FDW, FTW and TFC aren’t really necessary.

We have customers who use the SMAART FTW by default for measurements that they use in FIR Designer, and it gives them tuning results they are happy with.

See also…
https://www.rationalacoustics.com/download/Smaart-v8.3-Release-Overview.pdf See page 8.
https://www.prosoundtraining.com/2010/03/15/easera-systune/ See Figure 1.

Best regards,
EA Support

• This reply was modified 5 years, 1 month ago by EA Support.

[EA Support]

EA Support

13 September 2021 at 1:33 pm #346

Hi hulkss,

I presume you’re referring to windowing like SMAART’s FTW or SysTune’s TFC? No we don’t provide anything like these at measurement import. FTW and TFC are assisted by time averaging during the measurement process. By the time a “measurement” gets to FIR Designer, we don’t have DUT and reference signals from which to calculate frequency varying windowed TF’s and then a time averaged TF. In theory we could implement a frequency varying window process at measurement import, however for non-lab situations (like measurements in auditoriums), it’s unclear how effective this would be, when compared to the SMAART or SysTune methods of performing this along with time averaging.

We do provide fractional octave based frequency smoothing at measurement import. And in the “Auto Mag” and “Auto Phase” FIR tabs, there is the ability to use different fractional octave frequency smoothing in different frequency regions.

Kind regards,
EA Support

[EA Support]

EA Support

17 April 2021 at 7:52 am #336

Our sincere apologies. The macOS build was up to date but the windows build was not.

We’ve just rebuilt Windows and verified the version. Please download 3.1.2 again.

Best,
EA Support

[EA Support]

EA Support

31 March 2021 at 10:22 pm #332

2.1.0 accidentally included a new file loader which is not fully tested. We have turned this off in 2.1.1 which is now available.

Thanks for your help.

Best,
EA Support

[EA Support]

EA Support

31 March 2021 at 10:20 pm #331

We were able to replicate the problem and version 2.1.1 is now available.

Thanks for your help.

Best,
EA Support

[EA Support]

EA Support

30 March 2021 at 9:07 pm #330

Hi Vilcans,

There was a minor file format change in 2.1.0 but older files should load. Could you please send the System and (channel) project files to info@eclipaseaudio.com

Best,
EA Support

[EA Support]

EA Support

30 March 2021 at 8:58 pm #329

Hi Vilcans,

We’re very sorry to hear this. We need some more information to replicate the problem.
What version are you using?
What sample rates do you have set for the channels?
Are you on any particular tab (in the workflow) when the crash occurs?
What other windows are open? (e.g. second view, aux responses)

If you have any work already saved to system and (channel) project files, please email them all to info@eclipseaudio.com.

Best,
EA Support

[EA Support]

EA Support

28 March 2021 at 11:54 am #325

Noted. Thanks. Is there a technical reason why this would be helpful? Or just educational? From your example, the phase looks clean and there doesn’t seem to be a loudspeaker measurement loaded on the Import tab.

Best,
EA Support

[EA Support]

EA Support

21 February 2021 at 8:53 pm #320

Hi Kohno,

Is this an electrical/digital measurement of the filter in a processor? Or an acoustic measurement of the filter applied to a loudspeaker?

The amount of pre-ringing in the filter depends on how filter filter is designed and what your goals are (e.g. phase linearisation).

Reply to this post then email the FIR Creator project and/or filter to our support address and we’ll take a look.

Best regards,
EA Support