[EA Support]

EA Support

29 June 2022 at 8:19 am #501

Thanks!

BTW As you’ve probably noticed, there’s no error checking and feedback to the user from Q-SYS Designer. I was able to load 1, 2, 3, 4 or 5 value lines which gave obviously wrong filter behaviour.

[EA Support]

EA Support

27 June 2022 at 2:20 am #499

Noted.

EA Support

[EA Support]

EA Support

27 June 2022 at 2:19 am #498

Noted.

EA Support

[EA Support]

EA Support

25 June 2022 at 10:12 am #492

We just released 2.4.6 with a comma at the end of every row of the QSC Q-Sys CSV file.

Best,
EA Support

[EA Support]

EA Support

25 June 2022 at 7:57 am #490

Thanks, we’ll add a comma to line ends.

I’ve been testing here also. For me Q-SYS Designer (9.4.2) is only loading the first line.

Can you confirm that Q-SYS Designer is loading all four lines for you? If the QSYS Designer Custom IIR Block doesn’t look like FIR Designer, and if it has no more than ~180 of phase change across the plot, then it’s only loading the 1st line.

Their support page
https://q-syshelp.qsc.com/Index.htm#Schematic_Library/filter_IIR.htm
shows that the block should be capable of loading multiple lines.

Best,
EA Support

EDIT

I realised I needed to set the “Section Count” to the number of rows. With this set, all the lines of the CSV load correctly for me here.

Best,
EA Support

• This reply was modified 3 years, 8 months ago by EA Support.
• This reply was modified 3 years, 8 months ago by EA Support.

[EA Support]

EA Support

24 June 2022 at 11:58 am #485

Noted.

Best,
EA Support

[EA Support]

EA Support

11 June 2022 at 6:30 am #483

We’ve confirmed the bug. It will be fixed in the next update.

Thanks,
EA Support

[EA Support]

EA Support

21 May 2022 at 7:35 am #479

Thanks for letting us know. We’ve just updated the update scripts on the website. If you restart FIR Designer, it should give you a link now to 3.3.3.

Best regards,
EA Support

[EA Support]

EA Support

17 May 2022 at 5:55 pm #475

Hi Johnson,

The SMAART API grabs the transfer function as complex frequency domain values, with the frequency resolution determined by the current SMAART FFT size. SUT delay causes high phase slope in the transfer function. Further time averaging and frequency smoothing cause the delay to be blurred such that when the TF is converted back to an impulse response, the peak may not be distinct. The only alternative is to grab the impulse response through the SMAART API, and not the TF frequency values. I don’t think the API currently supports this – I’ll check with Rational – so in the meantime you’ll just have to remove SUT delay in SMAART.

Best regards,
EA Support

• This reply was modified 3 years, 9 months ago by EA Support.

[EA Support]

EA Support

17 May 2022 at 11:29 am #472

Suggestion noted.

BTW in the meantime you can open additional windows (using Project menu -> New Window), load the averaging session file and select a different averaging mode. This way you can compare different modes in different windows.

Best regards,
EA Support

[EA Support]

EA Support

16 May 2022 at 10:11 pm #469

Version 3.3.0 (8 May 2022) added options to show the target phase on the IIR tab and the IIR tab in Second View.

Best regards,
EA Support

[EA Support]

EA Support

22 April 2022 at 7:24 am #466

Sorry, I don’t understand the question. Using boosts or cuts, to push a response toward target, is completely up to the user, e.g. the Mag Adjust tab (and if the target response is visually too high, it can be lowered using the “Zero Adjust” slider). The Auto Mag tab inherently does both boosts and cuts but we are looking at algorithmic changes to give some user control of boosts and cuts independently.

Best regards,
EA Support

[EA Support]

EA Support

16 April 2022 at 12:06 pm #463

Hi eqjive,

Suggestion noted; thanks.

In short, the wavelet view gives a “frequency versus time” map of the loudspeaker response. The wavelet view of an ideal impulse is shown by default when the program is started. Once a measurement is loaded on the import tab, the waveleft view shows the frequency versus time map of the measurement. If the loudspeaker has, for example, “ringing” at various frequencies, the wavelet view will show patches to the right of the ideal wavelet shape at those frequencies. IIR crossovers, all-pass filters and other high-Q filtering will all cause some time smear in the loudspeaker response to the right of the “ideal” shape. Whether this is audible or not is somewhat subjective and varies with frequency; since the human auditory system performs somewhat differently at different frequencies.

With FIR filtering it’s possible to create mixed phase filters that undo some of the phase changes that cause the time smear. For example, try using auto-mag and auto-phase on a loudspeaker measurement and watch how the wavelet view changes. Or, without any measurements loaded, set channel 1 to a low-pass LR 4th order crossover filter and channel 2 to a high-pass LR 4th order crossover filter, so that the combined magnitude sums flat. What remains is a phase change due to the crossover filter. Note what the phase change looks like on the wavelet view.

For more detailed info, maybe google “wavelet analysis of loudspeakers.” Don Keele has one AES paper on the topic. A related analysis tool is the “waterfall plot” and you may find useful information on this also.

Best,
EA Support

[EA Support]

EA Support

16 April 2022 at 11:43 am #462

Hi eqjive,

Currently IIR settings need to be copied manually across into the Linea Research control software. (There is no export/import path to move the filters to Linea Research.) We have been in discussions with Linea Research about making this process easier, but I can’t give any timeline.

Best,
EA Support

[EA Support]

EA Support

3 April 2022 at 7:26 am #459

Noted. We’ll add that to the TODO list.

Regards,
EA Support