Forum Replies Created
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19 July 2024 at 5:44 am #863Hello! I am interested in what is the difference between calculating the IIR filter method 1 and method 2?
The calculation method is the same. The differences are just text formatting. The OP asked about how to get coefficients through to Audio Weaver and the examples above are two of the IIR filter export formats we have in our products.
Regards,
EA Support
13 July 2024 at 6:17 pm #852We have fixed the installers. Please check your email for a link to new downloads.
Best regards,
EA Support
13 July 2024 at 5:18 pm #850Our apologies. We’ll have a fix in a few hours and will message again shortly.
Regards,
EA Support
12 July 2024 at 7:02 pm #848The “InvM+T plot Zero Adjust (dB)” edit box has exactly the same effect as the slider, just without the convenience of the slider.
(Sorry, the slider was taking up too much space for it’s utility, so we’ve decided to remove it.)
Regards,
EA Support
12 July 2024 at 12:20 pm #844Thank you for noticing this. We intended to remove the slider in verion 4.3 but accidentally left it in place. To adjust the graph level, now use the “InvM+T plot Zero Adjust (dB)” edit box just to the left of the slider.
Best regards,
EA Support
12 July 2024 at 12:11 pm #842In this situation reinstalling should work. If it doesn’t, then contact us through the form on the website or via email, and we can reset the license to ensure it does work.
Regards,
EA Support
10 July 2024 at 12:20 pm #839What I am looking for is using Eclipse Audio software to provide not just offline processing, but real-time measurement and processing too. As per the SMAART control example I referred to. Will your software ever be expanded to be able to make live measurements too?
This is reliant on REW providing a realtime measurement streaming capability. We have no control of this. I’d suggest putting the question to REW. In the case of SMAART, they have a well documented realtime streaming API, which we connect to.
<Optimised for what? what we hear? removing detrimental reflections? etc. Can you outline why their method is so useful and should be adopted by everyone? I’m not aware of their method being published, can you provide a reference to this literature please?>
For this, I refer to you to Rational Acoustics. Their online SMAART user guide discusses some of these topics as well as their smoothing strategies, MTW and MTW+.
Regards,
EA Support
7 June 2024 at 8:07 pm #832>> Is purchasing Smaart Modeler the only way to emulate MESA PEQ at this point?
Yes, but the settings need to be manually copied to the Lake Controller. Presently there’s no way to export settings from DM and import into the Lake Controller. (We are working with Lab Gruppen to address this.)
7 June 2024 at 7:35 pm #829>> CL or XP modules support both types of PEQ.
Yes, that’s correct, and so does the “Lake FIR 3-way” module. Every module has Mesa EQ on the front (which is PEQ1 in your screenshots), then IIR filters that are part of the core loudspeaker preset.
>> However, when loading speaker presets, most of the left type classic PEQ tabs disappear
>> and only the right type PEQ tabs (MESA EQ) are available in modules or groups.That’s because the loudspeaker manufacturer, who created the preset, has intentionally locked and hidden the IIR filtering (and delay, gain, polarity & crossovers) that form the core loudspeaker preset. They don’t want end-users adjusting the core preset, and so only the MESA EQ is available to users. For more details on how to lock and unlock modules, and how to hide and unhide EQ tabs, see the Lake Controller manual.
>> Therefore, most users only use the right type of PEQ (or MESA EQ).
Yes, and also because the this EQ is available in group EQ, which ultimately combines with the Mesa EQ for each loudspeaker module.
>> If Lake Mesa supports the right type of modeling in Smaart Modeler, I hope
>> your software can support it too. Is this possible?
>> Isn’t it possible to apply MESA EQ emulation at least to the IIR filter?As you have shown in your screenshots, the Lake Mesa filters are completely different to regular IIR parametric filters. It’s not possible to translate and exactly match a Lake Mesa EQ response with IIR filters, with the limited number of IIR filter biquads available in any of the Lake modules.
Like I said, in future we might provide Lake Mesa emulation in FIR Designer, but currently there is no easy way to send the Lake Mesa information to the module in the Lake Controller (along with all the other core preset information, including IIR filters, gain, polarity and delay).
7 June 2024 at 4:01 pm #827Yes, the Lake Mesa mode in Data Modeler mimics the Lake EQ used on the front of Lake modules and Lake Controller groups. We made this for Data Modeler since that product is aimed at system alignment, where users are using the Lake EQ.
No, there are no immediate plans to put this into FIR Designer, primarily because there isn’t currently an easy way to send this information to the Lake Controller through the Lake Controller SDK API. (This may change in the future.)
All Lake modules have an instance of Lake EQ on the input, followed by Lake IIR filters for the input and output EQ and crossovers. We currently only emulate the IIR filters.
Best regards,
EA Support
5 June 2024 at 9:46 am #825Hi John,
Glad you got it working. We were about to suggest exactly what you did with adding a phase column. There’s an option, on the FIR Designer Target tab, to either ignore the phase and use magnitude only.
For TXT and CSV import, a file with:
– 2 columns is treated as an time impulse response (with 1st column as a timestamp and the 2nd column the impulse response coefficients).
– 3 columns is treated as frequency (Hz), magnitude (dB) and phase (deg).
– 4 columns is treated as per 3, with the 4 column as coherence (between 0 and 100 %)Best regards,
EA Support
31 May 2024 at 7:43 am #822The manufacturer of Prodigy.mp told me the following:
The FIR filters in PRODIGY.MP are special filters with an additional recursive element.
This allows us to achieve a higher frequency resolution in the lower range with a relatively short length.
The price for this is that only minimal phase filters are possible, not linear phase ones.
This certainly explains the CSV format, where only support frequencies and the associated level are specified.Thanks. So this tells me they are importing a magnitude response, as a CSV of frequency (Hz) and level (dB), and converting this into a minimum-phase filter response – with some of the filtering implemented using IIR filters (which are recursive) and some as a short FIR filter. This makes sense.
Our (FIR Designer and FIR Creator) products can make arbitrary phase filters – i.e. they can be any combination of minimum-phase, linear-phase and maximum-phase – but the exported output is time domain FIR coefficients. Again, see the “FIR Filter Guide” referenced above.
Best regards,
EA Support -
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