Trying different FIR coefficients   Leave a comment

After playing around with FIR Designer for a couple of days I finally got around to trying some different settings on the Auto Magnitude and Auto phase windows within the program and see what would happen with the final respons measured at the same multiple mic positions.

Within FIR designer you can use different settings ranging from ⅓ to none smoothing on both auto mag & auto phase functions.

Screen Shot 2017-12-18 at 4.46.54 PMScreen Shot 2017-12-18 at 4.49.37 PM

I also found that with the Armonia software from Powersoft it’s possible to load more then 1 FIR file in any given output channel (in my case i loaded 6 files) and after that compare which 1 has your desired response.

I used the auto mag & auto phase from 4kHz to 16kHz on a system that has a bit of a challenge in the 8kHz to 16kHz range.

Here’s the screen capture I made during testing the different files.


Be careful with using the various different possibilities specially when using higher order smoothing resolutions , working in a none reflection free environment and always verify on as many mic positions as possible if the respons is similar on al mics…..

Little update:

There are updates on Armonia and FIR Designer available online.

Here’s a little taste of what’s possible (at the cost of a higher latency). Below a avarage of 3 mic’s done with Powersoft Armonia/X8dante Smaart V8.2 (32K FFT size) matched ISEMcon mics and FIR Designer 2.2

FIR on Low + high +:- 6ms latencyFIR on Low + high +:- 6ms latency 1:24 smoothingFIR on Low + high +:- 6ms latency ⅓ smoothing

Enjoy 😉


Posted 18/12/2017 by timobeckmangeluid in FIR

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