Forum Replies Created
30 March 2021 at 8:58 pm #329
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 firstname.lastname@example.org.
EA Support21 February 2021 at 8:53 pm #320
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.
EA Support6 February 2021 at 7:16 am #317
We suspect the LIR is a complementary crossover where one channel is IIR filtered (e.g. HPF) and the other channel (with a LPF response) is created from the difference between the original input (with some small delay) and the filtered signal. When the two channels are added back together, only bulk delay is present and there isn’t any frequency varying phase shift.
We’ve been asked previously about implementing complementary crossovers in FIR Designer M and it’s on the todo list. To match LR’s LIR, we need to check with LR as to exactly what IIR filters they are using. Their paper suggests a 4th order IIR (for the HPF) and in our limited experience with this method, it results in approximately a 2nd order response on the complementary channel.
EA Support11 December 2020 at 7:12 am #307
It’s all there in the table on https://eclipseaudio.com/
Specific to making a FIR filter, the key difference is that FIR Designer doesn’t have any limits on the number of prototype Mag and Phase filters you can use and on the number of frequency bands or regions in the Auto Mag and Auto Phase tabs.
Also, FIR Designer has integrated measurement averaging and a few workflow helpers like Second View, Impedance viewing and no limits on the number of simultaneous project windows visible at any one time.
Maybe take a look at the FIR Designer 3 Overview video on
EA Support7 December 2020 at 11:29 pm #305
If IIR data from REW is exported as “filter settings,” then we (EA) need to either get the exact math from REW or take the time to match REW to known equations for IIR filters.
If IIR data from REW is exported as “filter coefficients,” then we could add the capability to load in the raw coefficients, but those IIR filters would not be editable or adjustable in FIR Designer. And the user would need to ensure the sample rates between REW and FIR Designer matched.7 December 2020 at 5:49 am #303
From the Export tab, FIR filters can be exported as text files and copied into the FIR Filter block or loaded using the Load button.
The IIR tab of FIR Designer can export raw coefficients for all IIR filters to a summary txt file, and the raw coefficients can be entered in this block.
EA Support30 November 2020 at 9:02 pm #290
WAV file import problems are common from REW since the IR peak is often well into the WAV file, rather than near the start. Better to use the IR TXT export. See REW on https://eclipseaudio.com/loudspeaker-measurements/